[{"date_updated":"2026-06-24T10:31:05Z","_id":"21437","license":"https://creativecommons.org/licenses/by-nc-nd/4.0/","acknowledgement":"We thank Nicola Spaldin and Marc Vila for valuable discussions. J.O. received support from the Quantum Materials (KC2202) program under the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231, and the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4537 to J.O. at UC Berkeley.","arxiv":1,"oa_version":"Published Version","publication_identifier":{"eissn":["2397-4648"]},"day":"30","ddc":["530"],"date_created":"2026-03-11T10:40:08Z","external_id":{"arxiv":["2511.16421"]},"article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"text":"Altermagnets are a class of collinear magnets that exhibit non-relativistic spin splitting (NRSS) of electronic bands in the absence of net magnetization. Their potential to generate large spin polarization without spin-orbit coupling has created strong interest in probes that access the underlying order parameter directly. In this Perspective, we show that linear magneto-birefringence (LMB) provides a natural and broadly applicable route to detecting altermagnetic order. Building on the correspondence between the momentum-space structure of NRSS and the ferroic ordering of magnetic multipoles in real space, we demonstrate how $d$-wave and $g$-wave NRSS textures yield distinct LMB responses. We present a symmetry-based framework that identifies the optical geometries and field configurations required to isolate specific multipole components, enabling domain imaging and providing benchmarks for theoretical models of LMB.","lang":"eng"}],"tmp":{"image":"/images/cc_by_nc_nd.png","short":"CC BY-NC-ND (4.0)","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode"},"citation":{"ama":"Sunko V, Orenstein J. Linear magneto-birefringence as a probe of altermagnetism. <i>npj Quantum Materials</i>. 2026. doi:<a href=\"https://doi.org/10.1038/s41535-026-00901-8\">10.1038/s41535-026-00901-8</a>","short":"V. Sunko, J. Orenstein, Npj Quantum Materials (2026).","mla":"Sunko, Veronika, and J. Orenstein. “Linear Magneto-Birefringence as a Probe of Altermagnetism.” <i>Npj Quantum Materials</i>, Springer Nature, 2026, doi:<a href=\"https://doi.org/10.1038/s41535-026-00901-8\">10.1038/s41535-026-00901-8</a>.","chicago":"Sunko, Veronika, and J. Orenstein. “Linear Magneto-Birefringence as a Probe of Altermagnetism.” <i>Npj Quantum Materials</i>. Springer Nature, 2026. <a href=\"https://doi.org/10.1038/s41535-026-00901-8\">https://doi.org/10.1038/s41535-026-00901-8</a>.","ieee":"V. Sunko and J. Orenstein, “Linear magneto-birefringence as a probe of altermagnetism,” <i>npj Quantum Materials</i>. Springer Nature, 2026.","apa":"Sunko, V., &#38; Orenstein, J. (2026). Linear magneto-birefringence as a probe of altermagnetism. <i>Npj Quantum Materials</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41535-026-00901-8\">https://doi.org/10.1038/s41535-026-00901-8</a>","ista":"Sunko V, Orenstein J. 2026. Linear magneto-birefringence as a probe of altermagnetism. npj Quantum Materials."},"corr_author":"1","publication":"npj Quantum Materials","publication_status":"epub_ahead","type":"journal_article","OA_place":"publisher","date_published":"2026-05-30T00:00:00Z","oa":1,"year":"2026","publisher":"Springer Nature","title":"Linear magneto-birefringence as a probe of altermagnetism","language":[{"iso":"eng"}],"has_accepted_license":"1","month":"05","status":"public","main_file_link":[{"url":"https://doi.org/10.1038/s41535-026-00901-8","open_access":"1"}],"department":[{"_id":"VeSu"}],"doi":"10.1038/s41535-026-00901-8","author":[{"last_name":"Sunko","id":"23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3","first_name":"Veronika","orcid":"0000-0003-2724-3523","full_name":"Sunko, Veronika"},{"last_name":"Orenstein","full_name":"Orenstein, J.","first_name":"J."}],"article_processing_charge":"Yes","OA_type":"gold"},{"project":[{"_id":"bd9ca328-d553-11ed-ba76-dc4f890cfe62","grant_number":"101019564","call_identifier":"H2020","name":"The design and evaluation of modern fully dynamic data structures"}],"volume":368,"das_tickbox":"0","publisher":"Schloss Dagstuhl - Leibniz-Zentrum für Informatik","year":"2026","month":"06","researchdata_availability":"no","language":[{"iso":"eng"}],"title":"Learning rate scheduling with matrix factorization for private training","keyword":["differential privacy","machine learning","matrix factorization"],"has_accepted_license":"1","doi":"10.4230/LIPIcs.FORC.2026.2","department":[{"_id":"ChLa"},{"_id":"GradSch"},{"_id":"MoHe"}],"status":"public","article_processing_charge":"No","author":[{"full_name":"Kalinin, Nikita","first_name":"Nikita","id":"4b14526e-14d2-11ed-ba64-c14c9553d137","last_name":"Kalinin"},{"last_name":"Andersson","full_name":"Andersson, Joel D","first_name":"Joel D","id":"4a893819-d954-11f0-89b1-e360bad9ccc5"}],"OA_type":"gold","_id":"22146","file":[{"checksum":"c661f016d3861a1c1b590b87a744d087","access_level":"open_access","file_name":"2026_LIPIcsFORC_Kalinin.pdf","relation":"main_file","date_created":"2026-06-29T06:55:23Z","file_id":"22149","content_type":"application/pdf","date_updated":"2026-06-29T06:55:23Z","success":1,"file_size":1231914,"creator":"dernst"}],"date_updated":"2026-06-29T06:56:34Z","file_date_updated":"2026-06-29T06:55:23Z","scopus_import":"1","license":"https://creativecommons.org/licenses/by/4.0/","ec_funded":1,"acknowledgement":"We thank Rasmus Pagh, Christoph Lampert and Jalaj Upadhyay for valuable\r\ncomments on an early draft. We thank Ryan Mckenna for a fruitful discussion on the experiment\r\ndesign. We thank Antti Honkela for sharing insights on learning rate scheduling and DP.\r\nNikita P. Kalinin: Funded in part by the Austrian Science Fund (FWF) [10.55776/COE12].\r\nJoel Daniel Andersson: Funded by the European Union. Views and opinions expressed are however\r\nthose of the author(s) only and do not necessarily reflect those of the European Union or the European\r\nResearch Council Executive Agency. Neither the European Union nor the granting authority can be\r\nheld responsible for them. This project has received funding from the European Research Council\r\n(ERC) under the European Union’s Horizon 2020 research and innovation programme (MoDynStruct,\r\nNo. 101019564). Additional funding by Providentia, a Data Science Distinguished Investigator grant\r\nfrom Novo Nordisk Fonden, with additional support from VILLUM Investigator grant 54451.\r\n","day":"01","publication_identifier":{"eissn":["1868-8969"],"isbn":["9783959774192"]},"oa_version":"Published Version","arxiv":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"lang":"eng","text":"We study differentially private model training with stochastic gradient descent under learning rate scheduling and correlated noise. Although correlated noise, in particular via matrix factorizations, has been shown to improve accuracy, prior theoretical work focused primarily on the prefix-sum workload. That workload assumes a constant learning rate, whereas in practice learning rate schedules are widely used to accelerate training and improve convergence. We close this gap by deriving general upper and lower bounds for a broad class of learning rate schedules in both single- and multi-epoch settings. Building on these results, we propose a learning-rate-aware factorization that achieves improvements over prefix-sum factorizations under both MaxSE and MeanSE error metrics. Our theoretical analysis yields memory-efficient constructions suitable for practical deployment, and experiments on CIFAR-10 and IMDB datasets confirm that schedule-aware factorizations improve accuracy in private training."}],"supplementarymaterial":"no","ddc":["000"],"external_id":{"arxiv":["2511.17994"]},"date_created":"2026-06-28T22:01:34Z","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","conference":{"name":"FORC: Symposium on Foundations of Responsible Computing","location":"Cambridge, MA; United States","end_date":"2026-06-05","start_date":"2026-06-03"},"alternative_title":["LIPIcs"],"intvolume":"       368","citation":{"chicago":"Kalinin, Nikita, and Joel D Andersson. “Learning Rate Scheduling with Matrix Factorization for Private Training.” In <i>7th Symposium on Foundations of Responsible Computing</i>, Vol. 368. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2026. <a href=\"https://doi.org/10.4230/LIPIcs.FORC.2026.2\">https://doi.org/10.4230/LIPIcs.FORC.2026.2</a>.","apa":"Kalinin, N., &#38; Andersson, J. D. (2026). Learning rate scheduling with matrix factorization for private training. In <i>7th Symposium on Foundations of Responsible Computing</i> (Vol. 368). Cambridge, MA; United States: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.FORC.2026.2\">https://doi.org/10.4230/LIPIcs.FORC.2026.2</a>","ista":"Kalinin N, Andersson JD. 2026. Learning rate scheduling with matrix factorization for private training. 7th Symposium on Foundations of Responsible Computing. FORC: Symposium on Foundations of Responsible Computing, LIPIcs, vol. 368, 2:1-2:21.","ieee":"N. Kalinin and J. D. Andersson, “Learning rate scheduling with matrix factorization for private training,” in <i>7th Symposium on Foundations of Responsible Computing</i>, Cambridge, MA; United States, 2026, vol. 368.","mla":"Kalinin, Nikita, and Joel D. Andersson. “Learning Rate Scheduling with Matrix Factorization for Private Training.” <i>7th Symposium on Foundations of Responsible Computing</i>, vol. 368, 2:1-2:21, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2026, doi:<a href=\"https://doi.org/10.4230/LIPIcs.FORC.2026.2\">10.4230/LIPIcs.FORC.2026.2</a>.","ama":"Kalinin N, Andersson JD. Learning rate scheduling with matrix factorization for private training. In: <i>7th Symposium on Foundations of Responsible Computing</i>. Vol 368. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2026. doi:<a href=\"https://doi.org/10.4230/LIPIcs.FORC.2026.2\">10.4230/LIPIcs.FORC.2026.2</a>","short":"N. Kalinin, J.D. Andersson, in:, 7th Symposium on Foundations of Responsible Computing, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2026."},"corr_author":"1","publication_status":"published","publication":"7th Symposium on Foundations of Responsible Computing","article_number":"2:1-2:21","date_published":"2026-06-01T00:00:00Z","oa":1,"type":"conference","OA_place":"publisher"},{"publication_status":"published","publication":"ACS Nano","date_published":"2026-06-23T00:00:00Z","oa":1,"page":"17360-17372","type":"journal_article","OA_place":"publisher","pmid":1,"quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"intvolume":"        20","citation":{"mla":"Shchukin, Konstantin P., et al. “On-Chip Tuning of Superconductivity in Fullerides via Current-Driven Rb+ Intercalation.” <i>ACS Nano</i>, vol. 20, no. 24, American Chemical Society, 2026, pp. 17360–72, doi:<a href=\"https://doi.org/10.1021/acsnano.6c02466\">10.1021/acsnano.6c02466</a>.","chicago":"Shchukin, Konstantin P., Oliver N. Gallego Lacey, Baptiste Coquinot, Jacek Jakowski, Jingsong Huang, Patrik Staudenmayer, Yannic Falke, Ram Prakash Pandeya, and Alexander Grüneis. “On-Chip Tuning of Superconductivity in Fullerides via Current-Driven Rb+ Intercalation.” <i>ACS Nano</i>. American Chemical Society, 2026. <a href=\"https://doi.org/10.1021/acsnano.6c02466\">https://doi.org/10.1021/acsnano.6c02466</a>.","ieee":"K. P. Shchukin <i>et al.</i>, “On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation,” <i>ACS Nano</i>, vol. 20, no. 24. American Chemical Society, pp. 17360–17372, 2026.","ista":"Shchukin KP, Gallego Lacey ON, Coquinot B, Jakowski J, Huang J, Staudenmayer P, Falke Y, Pandeya RP, Grüneis A. 2026. On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation. ACS Nano. 20(24), 17360–17372.","apa":"Shchukin, K. P., Gallego Lacey, O. N., Coquinot, B., Jakowski, J., Huang, J., Staudenmayer, P., … Grüneis, A. (2026). On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation. <i>ACS Nano</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acsnano.6c02466\">https://doi.org/10.1021/acsnano.6c02466</a>","ama":"Shchukin KP, Gallego Lacey ON, Coquinot B, et al. On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation. <i>ACS Nano</i>. 2026;20(24):17360-17372. doi:<a href=\"https://doi.org/10.1021/acsnano.6c02466\">10.1021/acsnano.6c02466</a>","short":"K.P. Shchukin, O.N. Gallego Lacey, B. Coquinot, J. Jakowski, J. Huang, P. Staudenmayer, Y. Falke, R.P. Pandeya, A. Grüneis, ACS Nano 20 (2026) 17360–17372."},"day":"23","publication_identifier":{"eissn":["1936-086X"],"issn":["1936-0851"]},"oa_version":"Published Version","PlanS_conform":"1","article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","supplementarymaterial":"yes","abstract":[{"lang":"eng","text":"An in-operando electro-intercalation method for the on-chip synthesis of alkali-metal-intercalated materials and their Raman spectroscopic and transport characterization in ultrahigh vacuum (UHV) is developed. We apply this method to synthesize fulleride superconductors via Rb+ intercalation into a C60 film. During the intercalation, we monitor the stoichiometry via UHV-Raman spectroscopy and probe superconductivity via transport measurements. An increase of the superconducting transition temperature from 7.0 K to 14.5 K is observed when the stoichiometry is tuned from Rb2.7C60 to Rb3C60. In our experiment, an ionic Rb+ flux into the host material is induced by an applied electronic current via a Butler–Volmer-type mechanism. Electro-intercalation captivates through improved stoichiometric precision, the ability to smoothly vary stoichiometry via duration of current application, and the absence of a lower limit of the volume of the host material. It represents a powerful concept for the on-chip synthesis of intercalated materials, battery research, and beyond."}],"ddc":["530"],"external_id":{"pmid":["42260723"]},"date_created":"2026-06-28T22:01:34Z","_id":"22145","file_date_updated":"2026-06-29T08:58:12Z","file":[{"creator":"dernst","file_size":6290296,"content_type":"application/pdf","date_updated":"2026-06-29T08:58:12Z","success":1,"file_id":"22150","date_created":"2026-06-29T08:58:12Z","file_name":"2026_ACSNano_Shchukin.pdf","relation":"main_file","access_level":"open_access","checksum":"01ec8ee6fab7bf563df7af13f6b43045"}],"date_updated":"2026-06-29T09:00:33Z","scopus_import":"1","acknowledgement":"A.G. and K.P.S. acknowledge the DFG through CRC 1238 (277146847, A01) and DFG project SE 2575. K.P.S., P.S., and A.G. would like to thank the Center for Micro- and Nanostructures (ZMNS) for providing the cleanroom facilities. K.P.S. thanks Daniele Nazari for help with ALD of Al2O3 films. Financial support from FFG Austria (CrystalGate) is acknowledged. A.G. thanks John Weaver for discussions about the structure of RbxC60. B.C. acknowledges support from the NOMIS Foundation. First-principles simulations were supported as part of user project CNMS2025-R-03182 at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. J.J. and J.H. acknowledge the computational resources provided by the ACCESS (Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support) program through allocation TG-DMR110037; the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported under Contract No. DE-AC02-05CH11231, through NERSC award BES-ERCAP0031261; and the Compute and Data Environment for Science (CADES) Baseline at Oak Ridge National Laboratory, supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The authors acknowledge TU Wien Bibliothek for financial support through its Open access funding provided by Technische Universitat Wien.","OA_type":"hybrid","article_processing_charge":"Yes (via OA deal)","author":[{"last_name":"Shchukin","full_name":"Shchukin, Konstantin P.","first_name":"Konstantin P."},{"last_name":"Gallego Lacey","first_name":"Oliver N.","full_name":"Gallego Lacey, Oliver N."},{"id":"f8417bd4-f599-11ee-a482-b927e3ed1e8e","first_name":"Baptiste","full_name":"Coquinot, Baptiste","orcid":"0000-0001-5524-596X","last_name":"Coquinot"},{"full_name":"Jakowski, Jacek","first_name":"Jacek","last_name":"Jakowski"},{"last_name":"Huang","first_name":"Jingsong","full_name":"Huang, Jingsong"},{"first_name":"Patrik","full_name":"Staudenmayer, Patrik","last_name":"Staudenmayer"},{"first_name":"Yannic","full_name":"Falke, Yannic","last_name":"Falke"},{"last_name":"Pandeya","full_name":"Pandeya, Ram Prakash","first_name":"Ram Prakash"},{"last_name":"Grüneis","full_name":"Grüneis, Alexander","first_name":"Alexander"}],"issue":"24","researchdata_availability":"no","month":"06","title":"On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation","language":[{"iso":"eng"}],"has_accepted_license":"1","keyword":["fulleride","intercalation","alkali metal","superconductivity","Raman"],"department":[{"_id":"MiLe"}],"doi":"10.1021/acsnano.6c02466","status":"public","volume":20,"das_tickbox":"0","publisher":"American Chemical Society","year":"2026"},{"article_processing_charge":"No","author":[{"first_name":"Michael","id":"3BE60946-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-4844-6311","full_name":"Riedl, Michael","last_name":"Riedl"},{"last_name":"Sixt","full_name":"Sixt, Michael K","orcid":"0000-0002-6620-9179","id":"41E9FBEA-F248-11E8-B48F-1D18A9856A87","first_name":"Michael K"}],"issue":"13","OA_type":"closed access","volume":189,"das_tickbox":"0","year":"2026","publisher":"Elsevier","researchdata_availability":"no","month":"06","title":"A new sense for electrical fields","language":[{"iso":"eng"}],"doi":"10.1016/j.cell.2026.05.038","department":[{"_id":"MiSi"}],"status":"public","quality_controlled":"1","intvolume":"       189","corr_author":"1","citation":{"short":"M. Riedl, M.K. Sixt, Cell 189 (2026) 3845–3846.","ama":"Riedl M, Sixt MK. A new sense for electrical fields. <i>Cell</i>. 2026;189(13):3845-3846. doi:<a href=\"https://doi.org/10.1016/j.cell.2026.05.038\">10.1016/j.cell.2026.05.038</a>","mla":"Riedl, Michael, and Michael K. Sixt. “A New Sense for Electrical Fields.” <i>Cell</i>, vol. 189, no. 13, Elsevier, 2026, pp. 3845–46, doi:<a href=\"https://doi.org/10.1016/j.cell.2026.05.038\">10.1016/j.cell.2026.05.038</a>.","ista":"Riedl M, Sixt MK. 2026. A new sense for electrical fields. Cell. 189(13), 3845–3846.","ieee":"M. Riedl and M. K. Sixt, “A new sense for electrical fields,” <i>Cell</i>, vol. 189, no. 13. Elsevier, pp. 3845–3846, 2026.","apa":"Riedl, M., &#38; Sixt, M. K. (2026). A new sense for electrical fields. <i>Cell</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.cell.2026.05.038\">https://doi.org/10.1016/j.cell.2026.05.038</a>","chicago":"Riedl, Michael, and Michael K Sixt. “A New Sense for Electrical Fields.” <i>Cell</i>. Elsevier, 2026. <a href=\"https://doi.org/10.1016/j.cell.2026.05.038\">https://doi.org/10.1016/j.cell.2026.05.038</a>."},"publication_status":"published","publication":"Cell","date_published":"2026-06-25T00:00:00Z","type":"journal_article","page":"3845-3846","_id":"22144","date_updated":"2026-06-29T09:04:49Z","scopus_import":"1","day":"25","publication_identifier":{"issn":["0092-8674"],"eissn":["1097-4172"]},"oa_version":"None","abstract":[{"lang":"eng","text":"Most cells polarize and migrate in response to electrical fields. In this issue of Cell, Belliveau et al. identify TMEM154/Galvanin, a receptor that serves as a cellular antenna to sense electrical gradients and guide migration toward the cathode."}],"supplementarymaterial":"no","article_type":"comment","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_created":"2026-06-28T22:01:34Z"},{"OA_type":"hybrid","issue":"12","author":[{"last_name":"Hunter","full_name":"Hunter, Zach","first_name":"Zach"},{"id":"5fca0887-a1db-11eb-95d1-ca9d5e0453b3","first_name":"Matthew Alan","full_name":"Kwan, Matthew Alan","orcid":"0000-0002-4003-7567","last_name":"Kwan"},{"last_name":"Sauermann","first_name":"Lisa","full_name":"Sauermann, Lisa"},{"last_name":"Sawhney","first_name":"Mehtaab","full_name":"Sawhney, Mehtaab"}],"article_processing_charge":"Yes (via OA deal)","status":"public","doi":"10.1093/imrn/rnag126","department":[{"_id":"MaKw"}],"title":"On random matrices with large corank","language":[{"iso":"eng"}],"has_accepted_license":"1","researchdata_availability":"no","month":"06","publisher":"Oxford University Press","year":"2026","das_tickbox":"0","volume":2026,"project":[{"_id":"bd95085b-d553-11ed-ba76-e55d3349be45","grant_number":"101076777","name":"Randomness and structure in combinatorics"}],"type":"journal_article","OA_place":"publisher","date_published":"2026-06-01T00:00:00Z","oa":1,"publication":"International Mathematics Research Notices","article_number":"rnag126","publication_status":"published","citation":{"mla":"Hunter, Zach, et al. “On Random Matrices with Large Corank.” <i>International Mathematics Research Notices</i>, vol. 2026, no. 12, rnag126, Oxford University Press, 2026, doi:<a href=\"https://doi.org/10.1093/imrn/rnag126\">10.1093/imrn/rnag126</a>.","chicago":"Hunter, Zach, Matthew Alan Kwan, Lisa Sauermann, and Mehtaab Sawhney. “On Random Matrices with Large Corank.” <i>International Mathematics Research Notices</i>. Oxford University Press, 2026. <a href=\"https://doi.org/10.1093/imrn/rnag126\">https://doi.org/10.1093/imrn/rnag126</a>.","ista":"Hunter Z, Kwan MA, Sauermann L, Sawhney M. 2026. On random matrices with large corank. International Mathematics Research Notices. 2026(12), rnag126.","apa":"Hunter, Z., Kwan, M. A., Sauermann, L., &#38; Sawhney, M. (2026). On random matrices with large corank. <i>International Mathematics Research Notices</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/imrn/rnag126\">https://doi.org/10.1093/imrn/rnag126</a>","ieee":"Z. Hunter, M. A. Kwan, L. Sauermann, and M. Sawhney, “On random matrices with large corank,” <i>International Mathematics Research Notices</i>, vol. 2026, no. 12. Oxford University Press, 2026.","ama":"Hunter Z, Kwan MA, Sauermann L, Sawhney M. On random matrices with large corank. <i>International Mathematics Research Notices</i>. 2026;2026(12). doi:<a href=\"https://doi.org/10.1093/imrn/rnag126\">10.1093/imrn/rnag126</a>","short":"Z. Hunter, M.A. Kwan, L. Sauermann, M. Sawhney, International Mathematics Research Notices 2026 (2026)."},"corr_author":"1","intvolume":"      2026","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"ddc":["500"],"external_id":{"arxiv":["2510.12933"]},"date_created":"2026-06-28T22:01:35Z","article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","supplementarymaterial":"no","abstract":[{"lang":"eng","text":"Let 1 ≤ k ≤ n and M be a random n × n matrix with independent uniformly random {±1}-entries. We\r\nshow that there exists an absolute constant c > 0 such that\r\nP[rank(M) ≤ n − k] ≤ exp(−cnk).\r\nThis confirms a well-known prediction in the area, extending a result of Rudelson (who previously\r\nproved this same result under the restriction k ≤ √n, via different methods)."}],"arxiv":1,"oa_version":"Published Version","PlanS_conform":"1","publication_identifier":{"eissn":["1687-0247"],"issn":["1073-7928"]},"day":"01","acknowledgement":"Z.H. was supported by SNSF grant 200021-228014. M.K. was supported by ERC Starting Grant “RANDSTRUCT” No. 101076777. L.S. was supported by the Deutsche Forschungsgemeinschaft (DFG, German\r\nResearch Foundation)—CRC 1720–539309657. This research was conducted during the period M.S. served\r\nas a Clay Research Fellow. This work began when the authors were visiting Mathematisches Forschungsinstitut Oberwolfach, which\r\nprovided ideal working conditions. M.S. thanks Vishesh Jain for initial discussions regarding the problem.\r\nWe also thank the anonymous referee for helpful comments.","scopus_import":"1","file":[{"success":1,"content_type":"application/pdf","date_updated":"2026-06-29T09:15:15Z","file_id":"22151","creator":"dernst","file_size":524993,"access_level":"open_access","checksum":"396b47d0532d7ea509f8cd30f11392a8","date_created":"2026-06-29T09:15:15Z","relation":"main_file","file_name":"2026_IMRN_Hunter.pdf"}],"date_updated":"2026-06-29T09:19:14Z","file_date_updated":"2026-06-29T09:15:15Z","_id":"22147"},{"oa":1,"date_published":"2026-06-23T00:00:00Z","OA_place":"publisher","pmid":1,"type":"journal_article","publication_status":"published","article_number":"5540","publication":"Nature Communications","intvolume":"        17","corr_author":"1","citation":{"ama":"Vargas Barroso VM, Watson J, Navas Olivé AC, Schlögl A, Jonas PM. Developmental emergence of sparse and structured synaptic connectivity in the hippocampal CA3 memory circuit. <i>Nature Communications</i>. 2026;17. doi:<a href=\"https://doi.org/10.1038/s41467-026-71914-x\">10.1038/s41467-026-71914-x</a>","short":"V.M. Vargas Barroso, J. Watson, A.C. Navas Olivé, A. Schlögl, P.M. Jonas, Nature Communications 17 (2026).","mla":"Vargas Barroso, Victor M., et al. “Developmental Emergence of Sparse and Structured Synaptic Connectivity in the Hippocampal CA3 Memory Circuit.” <i>Nature Communications</i>, vol. 17, 5540, Springer Nature, 2026, doi:<a href=\"https://doi.org/10.1038/s41467-026-71914-x\">10.1038/s41467-026-71914-x</a>.","chicago":"Vargas Barroso, Victor M, Jake Watson, Andrea C Navas Olivé, Alois Schlögl, and Peter M Jonas. “Developmental Emergence of Sparse and Structured Synaptic Connectivity in the Hippocampal CA3 Memory Circuit.” <i>Nature Communications</i>. Springer Nature, 2026. <a href=\"https://doi.org/10.1038/s41467-026-71914-x\">https://doi.org/10.1038/s41467-026-71914-x</a>.","apa":"Vargas Barroso, V. M., Watson, J., Navas Olivé, A. C., Schlögl, A., &#38; Jonas, P. M. (2026). Developmental emergence of sparse and structured synaptic connectivity in the hippocampal CA3 memory circuit. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-026-71914-x\">https://doi.org/10.1038/s41467-026-71914-x</a>","ista":"Vargas Barroso VM, Watson J, Navas Olivé AC, Schlögl A, Jonas PM. 2026. Developmental emergence of sparse and structured synaptic connectivity in the hippocampal CA3 memory circuit. Nature Communications. 17, 5540.","ieee":"V. M. Vargas Barroso, J. Watson, A. C. Navas Olivé, A. Schlögl, and P. M. Jonas, “Developmental emergence of sparse and structured synaptic connectivity in the hippocampal CA3 memory circuit,” <i>Nature Communications</i>, vol. 17. Springer Nature, 2026."},"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","dataavailabilitystatement":"Source data are provided with this paper. Additional original data are available from the corresponding author upon request. Code is available from https://doi.org/10.15479/AT-ISTA-21442 under the link https://research-explorer.ista.ac.at/download/21442/21443/ca3simu-vargas2026v1.tar.gz","supplementarymaterial":"yes","abstract":[{"text":"Hippocampal CA3 pyramidal neurons (PNs) form the largest autoassociative network in the mammalian brain. Whether CA3–CA3 recurrent connectivity is genetically preconfigured or environmentally shaped during ongoing memory storage is currently unknown. To address this question, we performed multicellular patch-clamp-based circuit mapping of up to eight CA3 PNs in the mouse hippocampus at multiple postnatal time points (P7–8, P18–25, and P45–50). Here, we show that the hippocampal CA3 network undergoes a developmental transformation from local, dense, and random connectivity to a distributed, sparse, and structured configuration. Thus, sparse and structured connectivity may emerge via experience-dependent mechanisms. In parallel, the strength of single synapses is downregulated; single synaptic events are sufficient to trigger postsynaptic spiking early in development, whereas spatial summation of several inputs is required at later time points. Biologically inspired models of memory storage by Hebbian synaptic plasticity and retrieval via pattern completion suggest that developmental changes improve specific aspects of memory storage and retrieval. Our results imply a developmental transformation of the neuronal code and the memory functions in the hippocampal CA3 network.</jats:p>","lang":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","date_created":"2026-06-30T13:05:52Z","external_id":{"pmid":["42014695"]},"ddc":["570"],"day":"23","publication_identifier":{"eissn":["2041-1723"]},"PlanS_conform":"1","oa_version":"Published Version","scopus_import":"1","ec_funded":1,"acknowledgement":"We thank Jose Guzman, Simon Hippenmeyer, and Tim Vogels for critically reading the manuscript, Jozsef Csicsvari for useful discussions, Florian Marr for technical assistance, and Eleftheria Kralli-Beller for manuscript editing. This research was supported by the Scientific Services Units (SSUs) of ISTA: the preclinical facility (PCF) provided housing and breeding of the animals, the imaging and optics facility (IOF) offered technical training and state of the art equipment, the Miba machine shop contributed to the construction and maintenance of multicellular recording setups, and the scientific computing unit helped with the large-scale simulations. The project received funding from the European Union’s Horizon 2020 research and innovation programme (ERC Advanced Grants No 692692 GIANTSYN and 101199096 CA3-SYNGRAM to P.J.; Marie Skłodowska-Curie Grant 754411 to V.V.B.; Marie Skłodowska-Curie Grant 101026635 to J.F.W.), the Fond zur Förderung der Wissenschaftlichen Forschung (P 36232-B, PAT4178023, and 10.55776/CoE16 to P.J.), and the Nomis Foundation (fellowship to A.N.-O.). V.V.B. received funding from a CONACyT fellowship (289638).","related_material":{"record":[{"id":"21442","relation":"research_data","status":"public"}]},"_id":"22229","file_date_updated":"2026-07-01T06:46:06Z","file":[{"file_name":"2026_NatureComm_VargasBarroso.pdf","relation":"main_file","date_created":"2026-07-01T06:46:06Z","checksum":"d0b0093493926985b4c268662ff4d556","access_level":"open_access","creator":"dernst","file_size":18304997,"file_id":"22231","content_type":"application/pdf","date_updated":"2026-07-01T06:46:06Z","success":1}],"date_updated":"2026-07-01T06:47:49Z","DOAJ_listed":"1","acknowledged_ssus":[{"_id":"PreCl"},{"_id":"Bio"},{"_id":"M-Shop"},{"_id":"ScienComp"}],"OA_type":"gold","article_processing_charge":"Yes","author":[{"id":"2F55A9DE-F248-11E8-B48F-1D18A9856A87","first_name":"Victor M","full_name":"Vargas Barroso, Victor M","last_name":"Vargas Barroso"},{"first_name":"Jake","id":"63836096-4690-11EA-BD4E-32803DDC885E","full_name":"Watson, Jake","orcid":"0000-0002-8698-3823","last_name":"Watson"},{"last_name":"Navas Olivé","id":"739d26c9-52e8-11ee-8d72-f14d3893b4ce","first_name":"Andrea C","orcid":"0000-0002-9280-8597","full_name":"Navas Olivé, Andrea C"},{"orcid":"0000-0002-5621-8100","full_name":"Schlögl, Alois","first_name":"Alois","id":"45BF87EE-F248-11E8-B48F-1D18A9856A87","last_name":"Schlögl"},{"orcid":"0000-0001-5001-4804","full_name":"Jonas, Peter M","first_name":"Peter M","id":"353C1B58-F248-11E8-B48F-1D18A9856A87","last_name":"Jonas"}],"department":[{"_id":"PeJo"},{"_id":"ScienComp"}],"doi":"10.1038/s41467-026-71914-x","status":"public","researchdata_availability":"yes","month":"06","has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Developmental emergence of sparse and structured synaptic connectivity in the hippocampal CA3 memory circuit","das_tickbox":"1","year":"2026","publisher":"Springer Nature","project":[{"grant_number":"692692","_id":"25B7EB9E-B435-11E9-9278-68D0E5697425","name":"Biophysics and circuit function of a giant cortical glutamatergic synapse","call_identifier":"H2020"},{"_id":"e62b56fe-ab3c-11f0-94c7-d181dd352b3b","grant_number":"101199096","name":"Synaptic mechanisms of engram storage and retrieval in CA3 hippocampal microcircuits"},{"call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411"},{"call_identifier":"H2020","name":"Synaptic computations of the hippocampal CA3 circuitry","_id":"fc2be41b-9c52-11eb-aca3-faa90aa144e9","grant_number":"101026635"},{"name":"Mechanisms of GABA release in hippocampal circuits","_id":"bd88be38-d553-11ed-ba76-81d5a70a6ef5","grant_number":"P36232"},{"name":"Synaptic networks of human brain","_id":"8d9195e9-16d5-11f0-9cad-d075be887a1e","grant_number":"PAT 4178023"},{"_id":"26366136-B435-11E9-9278-68D0E5697425","name":"Reglas de Conectividad funcional en el hipocampo"}],"volume":17},{"corr_author":"1","citation":{"ista":"Schlögl A. 2026. CA3Simu v1.06 (vargas2026v1), Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT-ISTA-21442\">10.15479/AT-ISTA-21442</a>.","ieee":"A. Schlögl, “CA3Simu v1.06 (vargas2026v1).” Institute of Science and Technology Austria, 2026.","apa":"Schlögl, A. (2026). CA3Simu v1.06 (vargas2026v1). Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-21442\">https://doi.org/10.15479/AT-ISTA-21442</a>","chicago":"Schlögl, Alois. “CA3Simu v1.06 (Vargas2026v1).” Institute of Science and Technology Austria, 2026. <a href=\"https://doi.org/10.15479/AT-ISTA-21442\">https://doi.org/10.15479/AT-ISTA-21442</a>.","mla":"Schlögl, Alois. <i>CA3Simu v1.06 (Vargas2026v1)</i>. Institute of Science and Technology Austria, 2026, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21442\">10.15479/AT-ISTA-21442</a>.","short":"A. Schlögl, (2026).","ama":"Schlögl A. CA3Simu v1.06 (vargas2026v1). 2026. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21442\">10.15479/AT-ISTA-21442</a>"},"tmp":{"legal_code_url":"https://www.gnu.org/licenses/gpl-3.0.en.html","short":"GPL 3.0","name":"GNU General Public License 3.0"},"author":[{"id":"45BF87EE-F248-11E8-B48F-1D18A9856A87","first_name":"Alois","orcid":"0000-0002-5621-8100","full_name":"Schlögl, Alois","last_name":"Schlögl"}],"oa":1,"date_published":"2026-03-12T00:00:00Z","type":"software","related_material":{"record":[{"status":"public","relation":"used_in_publication","id":"22229"}]},"ec_funded":1,"year":"2026","license":"https://opensource.org/licenses/GPL-3.0","publisher":"Institute of Science and Technology Austria","project":[{"name":"Synaptic mechanisms of engram storage and retrieval in CA3 hippocampal microcircuits","grant_number":"101199096","_id":"e62b56fe-ab3c-11f0-94c7-d181dd352b3b"},{"name":"Mechanisms of GABA release in hippocampal circuits","_id":"bd88be38-d553-11ed-ba76-81d5a70a6ef5","grant_number":"P36232"},{"name":"Synaptic networks of human brain","grant_number":"PAT 4178023","_id":"8d9195e9-16d5-11f0-9cad-d075be887a1e"},{"grant_number":"692692","_id":"25B7EB9E-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Biophysics and circuit function of a giant cortical glutamatergic synapse"}],"_id":"21442","file":[{"creator":"schloegl","file_size":160410,"file_id":"21443","success":1,"date_updated":"2026-03-12T08:19:14Z","content_type":"application/gzip","file_name":"ca3simu-vargas2026v1.tar.gz","relation":"main_file","date_created":"2026-03-12T08:19:14Z","checksum":"441c8827717dcda05f91c127d15cf1e9","access_level":"open_access"},{"checksum":"3c0092076228a15c0a7ae703192d43ea","access_level":"open_access","date_created":"2026-03-12T10:24:45Z","relation":"main_file","file_name":"README.md","content_type":"text/markdown","success":1,"date_updated":"2026-03-12T10:24:45Z","file_id":"21445","file_size":10923,"creator":"schloegl"}],"date_updated":"2026-07-01T06:47:49Z","file_date_updated":"2026-03-12T10:24:45Z","doi":"10.15479/AT-ISTA-21442","department":[{"_id":"ScienComp"},{"_id":"PeJo"}],"user_id":"68b8ca59-c5b3-11ee-8790-cd641c68093d","date_created":"2026-03-12T08:20:46Z","status":"public","day":"12","month":"03","has_accepted_license":"1","keyword":["hypocampus","ca3 simulations","modelling"],"title":"CA3Simu v1.06 (vargas2026v1)"},{"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"conference":{"name":"EGU General Assembly","start_date":"2026-05-03","location":"Vienna, Austria & Virtual","end_date":"2026-05-08"},"corr_author":"1","citation":{"ama":"Muñoz Hermosilla JM, Miles E, McCarthy M, et al. Constraining debris input to Oberaletsch Glacier using ensemble-based Lagrangian modelling. In: <i>EGU General Assembly 2026</i>. European Geosciences Union; 2026. doi:<a href=\"https://doi.org/10.5194/egusphere-egu26-19367\">10.5194/egusphere-egu26-19367</a>","short":"J.M. Muñoz Hermosilla, E. Miles, M. McCarthy, J.V. Melo Velasco, F. Hardmeier, P. GANTAYAT, A. Fontrodona-Bach, G. Jouvet, F. Pellicciotti, in:, EGU General Assembly 2026, European Geosciences Union, 2026.","mla":"Muñoz Hermosilla, José M., et al. “Constraining Debris Input to Oberaletsch Glacier Using Ensemble-Based Lagrangian Modelling.” <i>EGU General Assembly 2026</i>, EGU26-19367, European Geosciences Union, 2026, doi:<a href=\"https://doi.org/10.5194/egusphere-egu26-19367\">10.5194/egusphere-egu26-19367</a>.","chicago":"Muñoz Hermosilla, José M, Evan Miles, Michael McCarthy, Juan Vicente Melo Velasco, Florian Hardmeier, PRATEEK GANTAYAT, Adrià Fontrodona-Bach, Guillaume Jouvet, and Francesca Pellicciotti. “Constraining Debris Input to Oberaletsch Glacier Using Ensemble-Based Lagrangian Modelling.” In <i>EGU General Assembly 2026</i>. European Geosciences Union, 2026. <a href=\"https://doi.org/10.5194/egusphere-egu26-19367\">https://doi.org/10.5194/egusphere-egu26-19367</a>.","ista":"Muñoz Hermosilla JM, Miles E, McCarthy M, Melo Velasco JV, Hardmeier F, GANTAYAT P, Fontrodona-Bach A, Jouvet G, Pellicciotti F. 2026. Constraining debris input to Oberaletsch Glacier using ensemble-based Lagrangian modelling. EGU General Assembly 2026. EGU General Assembly, EGU26-19367.","apa":"Muñoz Hermosilla, J. M., Miles, E., McCarthy, M., Melo Velasco, J. V., Hardmeier, F., GANTAYAT, P., … Pellicciotti, F. (2026). Constraining debris input to Oberaletsch Glacier using ensemble-based Lagrangian modelling. In <i>EGU General Assembly 2026</i>. Vienna, Austria &#38; Virtual: European Geosciences Union. <a href=\"https://doi.org/10.5194/egusphere-egu26-19367\">https://doi.org/10.5194/egusphere-egu26-19367</a>","ieee":"J. M. Muñoz Hermosilla <i>et al.</i>, “Constraining debris input to Oberaletsch Glacier using ensemble-based Lagrangian modelling,” in <i>EGU General Assembly 2026</i>, Vienna, Austria &#38; Virtual, 2026."},"publication":"EGU General Assembly 2026","article_number":"EGU26-19367","publication_status":"published","OA_place":"publisher","type":"conference_abstract","oa":1,"date_published":"2026-07-02T00:00:00Z","file":[{"file_id":"22233","date_updated":"2026-07-02T06:22:50Z","content_type":"application/pdf","success":1,"creator":"dernst","file_size":284023,"access_level":"open_access","checksum":"2ea3e691cfa53176d0e801b9172842d6","relation":"main_file","file_name":"2026_EGU26_MunozHermosilla.pdf","date_created":"2026-07-02T06:22:50Z"}],"file_date_updated":"2026-07-02T06:22:50Z","date_updated":"2026-07-02T06:42:37Z","_id":"22119","oa_version":"Published Version","day":"02","date_created":"2026-06-22T12:16:50Z","ddc":["550"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"first_name":"José M","id":"e1037a6d-646e-11ef-b402-e0ed9ab0901e","orcid":"0000-0002-1990-8508","full_name":"Muñoz Hermosilla, José M","last_name":"Muñoz Hermosilla"},{"first_name":"Evan","full_name":"Miles, Evan","last_name":"Miles"},{"full_name":"McCarthy, Michael","first_name":"Michael","id":"22a2674a-61ce-11ee-94b5-d18813baf16f","last_name":"McCarthy"},{"last_name":"Melo Velasco","id":"2611dec0-b9c6-11ed-9bea-a81c2b17a549","first_name":"Juan Vicente","full_name":"Melo Velasco, Juan Vicente"},{"last_name":"Hardmeier","full_name":"Hardmeier, Florian","first_name":"Florian"},{"last_name":"GANTAYAT","id":"02734268-3e8d-11ef-80a1-cec4a088d004","first_name":"PRATEEK","full_name":"GANTAYAT, PRATEEK"},{"last_name":"Fontrodona-Bach","first_name":"Adrià","id":"f06891fd-9f42-11ee-8632-a20971c43046","full_name":"Fontrodona-Bach, Adrià"},{"last_name":"Jouvet","full_name":"Jouvet, Guillaume","first_name":"Guillaume"},{"last_name":"Pellicciotti","first_name":"Francesca","id":"b28f055a-81ea-11ed-b70c-a9fe7f7b0e70","orcid":"0000-0002-5554-8087","full_name":"Pellicciotti, Francesca"}],"article_processing_charge":"No","OA_type":"gold","publisher":"European Geosciences Union","year":"2026","has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Constraining debris input to Oberaletsch Glacier using ensemble-based Lagrangian modelling","month":"07","status":"public","doi":"10.5194/egusphere-egu26-19367","department":[{"_id":"FrPe"},{"_id":"GradSch"}]},{"month":"06","researchdata_availability":"no","has_accepted_license":"1","keyword":["Congestion Approximators","Hierarchical Graph Decompositions"],"language":[{"iso":"eng"}],"title":"An improved quality hierarchical congestion approximator in near-linear time","doi":"10.1145/3798129.3800851","department":[{"_id":"MoHe"}],"status":"public","project":[{"_id":"bd9ca328-d553-11ed-ba76-dc4f890cfe62","grant_number":"101019564","name":"The design and evaluation of modern fully dynamic data structures","call_identifier":"H2020"},{"_id":"bda196b2-d553-11ed-ba76-8e8ee6c21103","grant_number":"I05982","name":"Static and Dynamic Hierarchical Graph Decompositions"}],"das_tickbox":"0","publisher":"Association for Computing Machinery","year":"2026","OA_type":"gold","article_processing_charge":"No","author":[{"last_name":"Henzinger","full_name":"Henzinger, Monika H","orcid":"0000-0002-5008-6530","first_name":"Monika H","id":"540c9bbd-f2de-11ec-812d-d04a5be85630"},{"full_name":"Münk, Robin","first_name":"Robin","last_name":"Münk"},{"last_name":"Räcke","first_name":"Harald","full_name":"Räcke, Harald"}],"publication_identifier":{"issn":["0737-8017"],"isbn":["9798400725364"]},"day":"09","arxiv":1,"oa_version":"Published Version","abstract":[{"text":"A single-commodity congestion approximator for a graph is a compact data structure that approximately predicts the edge congestion required to route any set of single-commodity flow demands in a network. A hierarchical congestion approximator (HCA) consists of a laminar family of cuts in the graph and has numerous applications in approximating cut and flow problems in graphs, designing efficient routing schemes, and managing distributed networks.\r\nThere is a tradeoff between the running time for computing an HCA and its approximation quality. The best polynomial-time construction in an n-node graph gives an HCA with approximation quality O(log1.5n loglogn). Among near-linear time algorithms, the best previous result achieves approximation quality O(log4 n). We improve upon the latter result by giving the first near-linear time algorithm for computing an HCA with approximation quality O(log2 n loglogn). Additionally, our algorithm can be implemented in the parallel setting with polylogarithmic span and near-linear work, achieving the same approximation quality. This improves upon the best previous such algorithm, which has an O(log9n) approximation quality. We also present a lower bound of Ω(logn) for the approximation guarantee of hierarchical congestion approximators.\r\nCrucial for achieving a near-linear running time is a new partitioning routine that, unlike previous such routines, manages to avoid recursing on large subgraphs. To achieve the improved approximation quality, we introduce the new concept of border routability of a cut and provide an improved sparsest cut oracle for general vertex weights.","lang":"eng"}],"supplementarymaterial":"no","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["2511.03716"]},"date_created":"2026-07-05T22:01:36Z","ddc":["000"],"_id":"22245","date_updated":"2026-07-06T06:59:52Z","file":[{"access_level":"open_access","checksum":"2bef46be8da6d19a641697bb0d8ade65","file_name":"2026_STOC_HenzingerMo.pdf","relation":"main_file","date_created":"2026-07-06T06:57:16Z","file_id":"22250","date_updated":"2026-07-06T06:57:16Z","success":1,"content_type":"application/pdf","file_size":919005,"creator":"dernst"}],"file_date_updated":"2026-07-06T06:57:16Z","scopus_import":"1","ec_funded":1,"acknowledgement":"We thank Evangelos Kosinas for helpful discussions on this topic.\r\nFunded by the European Union. Views and opinions expressed\r\nare however those of the author(s) only and do not necessarily\r\nreflect those of the European Union or the European Research\r\nCouncil Executive Agency. Neither the European Union nor the\r\ngranting authority can be held responsible for them.\r\nThis project has received funding from the European Research\r\nCouncil (ERC) under the European Union’s Horizon 2020 research\r\nand innovation programme (MoDynStruct, No. 101019564)\r\nand the Austrian Science Fund (FWF) grant DOI 10.55776/I5982. For\r\nopen access purposes, the author has applied a CC BY public copyright license to any author-accepted manuscript version arising\r\nfrom this submission.\r\nThis project has received funding from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 498605858.","publication_status":"published","publication":"58th Annual ACM Symposium on Theory of Computing","oa":1,"date_published":"2026-06-09T00:00:00Z","OA_place":"publisher","page":"1417-1428","type":"conference","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"conference":{"start_date":"2026-06-22","location":"Salt Lake City, UT, United States","end_date":"2026-06-26","name":"STOC: Symposium on the Theory of Computing"},"quality_controlled":"1","corr_author":"1","citation":{"ama":"Henzinger M, Münk R, Räcke H. An improved quality hierarchical congestion approximator in near-linear time. In: <i>58th Annual ACM Symposium on Theory of Computing</i>. Association for Computing Machinery; 2026:1417-1428. doi:<a href=\"https://doi.org/10.1145/3798129.3800851\">10.1145/3798129.3800851</a>","short":"M. Henzinger, R. Münk, H. Räcke, in:, 58th Annual ACM Symposium on Theory of Computing, Association for Computing Machinery, 2026, pp. 1417–1428.","mla":"Henzinger, Monika, et al. “An Improved Quality Hierarchical Congestion Approximator in Near-Linear Time.” <i>58th Annual ACM Symposium on Theory of Computing</i>, Association for Computing Machinery, 2026, pp. 1417–28, doi:<a href=\"https://doi.org/10.1145/3798129.3800851\">10.1145/3798129.3800851</a>.","chicago":"Henzinger, Monika, Robin Münk, and Harald Räcke. “An Improved Quality Hierarchical Congestion Approximator in Near-Linear Time.” In <i>58th Annual ACM Symposium on Theory of Computing</i>, 1417–28. Association for Computing Machinery, 2026. <a href=\"https://doi.org/10.1145/3798129.3800851\">https://doi.org/10.1145/3798129.3800851</a>.","apa":"Henzinger, M., Münk, R., &#38; Räcke, H. (2026). An improved quality hierarchical congestion approximator in near-linear time. In <i>58th Annual ACM Symposium on Theory of Computing</i> (pp. 1417–1428). Salt Lake City, UT, United States: Association for Computing Machinery. <a href=\"https://doi.org/10.1145/3798129.3800851\">https://doi.org/10.1145/3798129.3800851</a>","ieee":"M. Henzinger, R. Münk, and H. Räcke, “An improved quality hierarchical congestion approximator in near-linear time,” in <i>58th Annual ACM Symposium on Theory of Computing</i>, Salt Lake City, UT, United States, 2026, pp. 1417–1428.","ista":"Henzinger M, Münk R, Räcke H. 2026. An improved quality hierarchical congestion approximator in near-linear time. 58th Annual ACM Symposium on Theory of Computing. STOC: Symposium on the Theory of Computing, 1417–1428."}},{"issue":"4","article_processing_charge":"Yes (via OA deal)","author":[{"id":"488e236c-6bad-11f0-9831-859175c78e8a","first_name":"Peiyuan","full_name":"Xie, Peiyuan","last_name":"Xie"},{"last_name":"Hafner","full_name":"Hafner, Christian","id":"400429CC-F248-11E8-B48F-1D18A9856A87","first_name":"Christian"},{"first_name":"Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","full_name":"Wojtan, Christopher J","orcid":"0000-0001-6646-5546","last_name":"Wojtan"}],"OA_type":"hybrid","das_tickbox":"0","year":"2026","publisher":"Association for Computing Machinery","project":[{"name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088","grant_number":"101045083"}],"volume":45,"department":[{"_id":"GradSch"},{"_id":"ChWo"}],"doi":"10.1145/3811339","status":"public","month":"07","researchdata_availability":"no","has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Fast and exact winding numbers for triangle meshes","intvolume":"        45","corr_author":"1","citation":{"ama":"Xie P, Hafner C, Wojtan C. Fast and exact winding numbers for triangle meshes. <i>ACM Transactions on Graphics</i>. 2026;45(4). doi:<a href=\"https://doi.org/10.1145/3811339\">10.1145/3811339</a>","short":"P. Xie, C. Hafner, C. Wojtan, ACM Transactions on Graphics 45 (2026).","chicago":"Xie, Peiyuan, Christian Hafner, and Chris Wojtan. “Fast and Exact Winding Numbers for Triangle Meshes.” <i>ACM Transactions on Graphics</i>. Association for Computing Machinery, 2026. <a href=\"https://doi.org/10.1145/3811339\">https://doi.org/10.1145/3811339</a>.","ista":"Xie P, Hafner C, Wojtan C. 2026. Fast and exact winding numbers for triangle meshes. ACM Transactions on Graphics. 45(4), 41.","ieee":"P. Xie, C. Hafner, and C. Wojtan, “Fast and exact winding numbers for triangle meshes,” <i>ACM Transactions on Graphics</i>, vol. 45, no. 4. Association for Computing Machinery, 2026.","apa":"Xie, P., Hafner, C., &#38; Wojtan, C. (2026). Fast and exact winding numbers for triangle meshes. <i>ACM Transactions on Graphics</i>. Association for Computing Machinery. <a href=\"https://doi.org/10.1145/3811339\">https://doi.org/10.1145/3811339</a>","mla":"Xie, Peiyuan, et al. “Fast and Exact Winding Numbers for Triangle Meshes.” <i>ACM Transactions on Graphics</i>, vol. 45, no. 4, 41, Association for Computing Machinery, 2026, doi:<a href=\"https://doi.org/10.1145/3811339\">10.1145/3811339</a>."},"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","oa":1,"date_published":"2026-07-03T00:00:00Z","OA_place":"publisher","type":"journal_article","publication_status":"published","publication":"ACM Transactions on Graphics","article_number":"41","scopus_import":"1","acknowledgement":"We thank Sadashige Ishida and Ryusuke Sugimoto for their insightful discussions and proofreading and other members of the ISTA\r\nVisual Computing Group for their general feedback. This project was\r\nfunded in part by the European Research Council (ERC Consolidator\r\nGrant 101045083 CoDiNA).","_id":"22241","date_updated":"2026-07-06T06:14:18Z","file":[{"file_size":5212838,"creator":"dernst","file_id":"22249","date_updated":"2026-07-06T06:13:12Z","success":1,"content_type":"application/pdf","file_name":"2026_TransactionsGraphics_Xie.pdf","relation":"main_file","date_created":"2026-07-06T06:13:12Z","checksum":"7e36e69f377b680a893e65b620b43813","access_level":"open_access"}],"file_date_updated":"2026-07-06T06:13:12Z","abstract":[{"text":"We revisit the computation of 3D generalized winding numbers, a useful measure for inside-outside classification on triangle meshes with gaps, self-intersections, and open boundaries. At the core of our new method is an analytical reduction of the surface integral that defines the winding number, resulting in a single ray-mesh intersection test and an elementary sum over boundary edges per evaluation. This construction is orders of magnitude more efficient than the state of the art in practice, which we show in an extensive performance benchmark. Conveniently, the method also reduces to the best-available asymptotic complexity in the worst case, and it introduces no approximations apart from floating-point errors. Our algorithm is conceptually simple to understand, straightforward to implement and debug, and it works reliably even on extremely noisy and corrupt input geometry.","lang":"eng"}],"supplementarymaterial":"no","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","date_created":"2026-07-03T21:03:48Z","ddc":["000"],"publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"day":"03","PlanS_conform":"1","oa_version":"Published Version"},{"has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Learning by Training: Emergent physical memory from cyclically tuning disordered sphere packings","researchdata_availability":"upon request","month":"06","status":"public","doi":"10.1103/48k2-cw3b","department":[{"_id":"CaGo"}],"volume":4,"year":"2026","publisher":"American Physical Society","das_tickbox":"1","OA_type":"gold","author":[{"full_name":"Zu, Mengjie","first_name":"Mengjie","id":"26dd9e7c-e86a-11eb-a854-82ac731c9ae2","last_name":"Zu"},{"id":"EB352CD2-F68A-11E9-89C5-A432E6697425","first_name":"Carl Peter","full_name":"Goodrich, Carl Peter","orcid":"0000-0002-1307-5074","last_name":"Goodrich"}],"article_processing_charge":"Yes","issue":"2","PlanS_conform":"1","oa_version":"Published Version","publication_identifier":{"eissn":["2835-8279"]},"day":"18","date_created":"2026-07-05T22:01:37Z","ddc":["570"],"supplementarymaterial":"no","abstract":[{"lang":"eng","text":"Many living and artificial systems improve their fitness or performance by adapting to changing environments or diverse training data. However, it remains unclear how environmental variation shapes adaptation, what is learned, and when memory of past conditions is retained. Here we show how cyclic environmental change can produce robust memory. Using a model athermal disordered solid trained by inverse design to attain target elastic properties over a prescribed range, we find that the system evolves toward a marginally absorbing manifold (MAM), meaning that training is reversible within the training range but not beyond it, which encodes a memory of that range. We further propose a general mechanism for MAM formation and memory encoding based on discontinuities in the gradient of the trained quantity. These results provide a simple, broadly applicable physical framework for how adaptive systems learn under changing environments and retain memory of past conditions."}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","DOAJ_listed":"1","file":[{"file_id":"22251","date_updated":"2026-07-06T07:24:43Z","content_type":"application/pdf","success":1,"file_size":2758728,"creator":"dernst","checksum":"e2d13c30bf9c036951fd2ba3455cf72a","access_level":"open_access","relation":"main_file","file_name":"2026_PRXLife_Zu.pdf","date_created":"2026-07-06T07:24:43Z"}],"date_updated":"2026-07-06T07:28:45Z","file_date_updated":"2026-07-06T07:24:43Z","_id":"22248","acknowledgement":"We thank Nathan Keim, Aayush Desai, Nicholas Barton,\r\nand Gašper Tkacik for important and stimulating discussions. ˇ\r\nThe work was funded by the Institute of Science and Technology Austria.","scopus_import":"1","article_number":"023029","publication":"PRX Life","publication_status":"published","OA_place":"publisher","type":"journal_article","oa":1,"date_published":"2026-06-18T00:00:00Z","dataavailabilitystatement":"The data that support the findings of this article are not\r\npublicly available. The data are available from the authors\r\nupon reasonable request.","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","corr_author":"1","citation":{"mla":"Zu, Mengjie, and Carl Peter Goodrich. “Learning by Training: Emergent Physical Memory from Cyclically Tuning Disordered Sphere Packings.” <i>PRX Life</i>, vol. 4, no. 2, 023029, American Physical Society, 2026, doi:<a href=\"https://doi.org/10.1103/48k2-cw3b\">10.1103/48k2-cw3b</a>.","apa":"Zu, M., &#38; Goodrich, C. P. (2026). Learning by Training: Emergent physical memory from cyclically tuning disordered sphere packings. <i>PRX Life</i>. American Physical Society. <a href=\"https://doi.org/10.1103/48k2-cw3b\">https://doi.org/10.1103/48k2-cw3b</a>","ista":"Zu M, Goodrich CP. 2026. Learning by Training: Emergent physical memory from cyclically tuning disordered sphere packings. PRX Life. 4(2), 023029.","ieee":"M. Zu and C. P. Goodrich, “Learning by Training: Emergent physical memory from cyclically tuning disordered sphere packings,” <i>PRX Life</i>, vol. 4, no. 2. American Physical Society, 2026.","chicago":"Zu, Mengjie, and Carl Peter Goodrich. “Learning by Training: Emergent Physical Memory from Cyclically Tuning Disordered Sphere Packings.” <i>PRX Life</i>. American Physical Society, 2026. <a href=\"https://doi.org/10.1103/48k2-cw3b\">https://doi.org/10.1103/48k2-cw3b</a>.","short":"M. Zu, C.P. Goodrich, PRX Life 4 (2026).","ama":"Zu M, Goodrich CP. Learning by Training: Emergent physical memory from cyclically tuning disordered sphere packings. <i>PRX Life</i>. 2026;4(2). doi:<a href=\"https://doi.org/10.1103/48k2-cw3b\">10.1103/48k2-cw3b</a>"},"intvolume":"         4"},{"OA_type":"green","issue":"23","author":[{"first_name":"Martynas","full_name":"Skrabulis, Martynas","last_name":"Skrabulis"},{"last_name":"Sosa","first_name":"Martin Colombano","full_name":"Sosa, Martin Colombano"},{"last_name":"Zambon","first_name":"Nicola Carlon","full_name":"Zambon, Nicola Carlon"},{"id":"d67706f8-8eb1-11ee-ad1b-9c30dfa19e0b","first_name":"Andrei","full_name":"Militaru, Andrei","last_name":"Militaru"},{"full_name":"Rossi, Massimiliano","first_name":"Massimiliano","last_name":"Rossi"},{"last_name":"Frimmer","first_name":"Martin","full_name":"Frimmer, Martin"},{"first_name":"Lukas","full_name":"Novotny, Lukas","last_name":"Novotny"}],"article_processing_charge":"No","status":"public","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2601.19392","open_access":"1"}],"doi":"10.1103/9wzm-3qyb","department":[{"_id":"JoFi"}],"language":[{"iso":"eng"}],"title":"Nanomechanical sensor resolving impulsive forces below its zero-point fluctuations","month":"06","researchdata_availability":"yes","publisher":"American Physical Society","year":"2026","das_tickbox":"1","volume":136,"type":"journal_article","OA_place":"repository","date_published":"2026-06-12T00:00:00Z","oa":1,"publication":"Physical Review Letters","article_number":"233604","publication_status":"published","citation":{"ama":"Skrabulis M, Sosa MC, Zambon NC, et al. Nanomechanical sensor resolving impulsive forces below its zero-point fluctuations. <i>Physical Review Letters</i>. 2026;136(23). doi:<a href=\"https://doi.org/10.1103/9wzm-3qyb\">10.1103/9wzm-3qyb</a>","short":"M. Skrabulis, M.C. Sosa, N.C. Zambon, A. Militaru, M. Rossi, M. Frimmer, L. Novotny, Physical Review Letters 136 (2026).","chicago":"Skrabulis, Martynas, Martin Colombano Sosa, Nicola Carlon Zambon, Andrei Militaru, Massimiliano Rossi, Martin Frimmer, and Lukas Novotny. “Nanomechanical Sensor Resolving Impulsive Forces below Its Zero-Point Fluctuations.” <i>Physical Review Letters</i>. American Physical Society, 2026. <a href=\"https://doi.org/10.1103/9wzm-3qyb\">https://doi.org/10.1103/9wzm-3qyb</a>.","apa":"Skrabulis, M., Sosa, M. C., Zambon, N. C., Militaru, A., Rossi, M., Frimmer, M., &#38; Novotny, L. (2026). Nanomechanical sensor resolving impulsive forces below its zero-point fluctuations. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/9wzm-3qyb\">https://doi.org/10.1103/9wzm-3qyb</a>","ieee":"M. Skrabulis <i>et al.</i>, “Nanomechanical sensor resolving impulsive forces below its zero-point fluctuations,” <i>Physical Review Letters</i>, vol. 136, no. 23. American Physical Society, 2026.","ista":"Skrabulis M, Sosa MC, Zambon NC, Militaru A, Rossi M, Frimmer M, Novotny L. 2026. Nanomechanical sensor resolving impulsive forces below its zero-point fluctuations. Physical Review Letters. 136(23), 233604.","mla":"Skrabulis, Martynas, et al. “Nanomechanical Sensor Resolving Impulsive Forces below Its Zero-Point Fluctuations.” <i>Physical Review Letters</i>, vol. 136, no. 23, 233604, American Physical Society, 2026, doi:<a href=\"https://doi.org/10.1103/9wzm-3qyb\">10.1103/9wzm-3qyb</a>."},"intvolume":"       136","dataavailabilitystatement":"The data that support the findings of this article are openly available DOI 10.3929/ethz-c-000798807","quality_controlled":"1","date_created":"2026-07-05T22:01:36Z","external_id":{"arxiv":["2601.19392"]},"article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"lang":"eng","text":"The sensitivity of a mechanical transducer is ultimately limited by its inherent quantum fluctuations. Here, we use an optically levitated nanoparticle to measure impulsive forces smaller than the particle’s zero-point momentum uncertainty. Our approach relies on reversibly squeezing the levitated particle’s center-of-mass motion to coherently amplify the perturbation. We demonstrate an impulsive-force resolution as small as 6.9  keV/c, a value 0.6 dB below the sensor’s zero-point value."}],"supplementarymaterial":"yes","arxiv":1,"oa_version":"Preprint","publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"day":"12","acknowledgement":"We thank Oscar Schmitt Kremer for his help with the Kalman filter and the rest of our colleagues at the ETH Photonics Laboratory for fruitful discussions. This research has been supported by the Swiss SERI Quantum Initiative (Grants No. UeM019-2 and No. UeM029-3), the Swiss National Science Foundation (Grant No. 51NF40-160591), and the European Research Council (ERC) under the Grant Agreement No. [951234] (Q-Xtreme ERC-2020-SyG). M. C. S. acknowledges support through an SNSF Fellowship (Grant No. 224465).","scopus_import":"1","date_updated":"2026-07-06T07:07:24Z","_id":"22244"},{"publication_identifier":{"eissn":["1942-3462"],"issn":["1942-3454"]},"day":"04","oa_version":"Published Version","arxiv":1,"PlanS_conform":"1","article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"lang":"eng","text":"A linearly ordered (LO) k-colouring of a hypergraph is a colouring of its vertices with colours 1, …, k such that each edge contains a unique maximal colour. Deciding whether an input hypergraph admits LO k-colouring with a fixed number of colours is NP-complete (and in the special case of graphs, LO colouring coincides with the usual graph colouring).\r\nHere, we investigate the complexity of approximating the “linearly ordered chromatic number” of a hypergraph. We prove that the following promise problem is NP-complete: Given a 3-uniform hypergraph, distinguish between the case that it is LO 3-colourable, and the case that it is not even LO 4-colourable. We prove this result by a combination of algebraic, topological, and combinatorial methods, building on and extending a topological approach for studying approximate graph colouring introduced by Krokhin, Opršal, Wrochna, and Živný (2023)."}],"supplementarymaterial":"no","ddc":["500"],"external_id":{"arxiv":["2312.12981"]},"date_created":"2026-07-05T22:01:37Z","_id":"22247","file":[{"access_level":"open_access","checksum":"0399ab94085878fc810084845eabd627","relation":"main_file","file_name":"2026_TransactionsGraphics_Filakovsky.pdf","date_created":"2026-07-06T09:03:02Z","file_id":"22252","date_updated":"2026-07-06T09:03:02Z","success":1,"content_type":"application/pdf","creator":"dernst","file_size":941518}],"file_date_updated":"2026-07-06T09:03:02Z","date_updated":"2026-07-06T09:06:29Z","scopus_import":"1","ec_funded":1,"related_material":{"record":[{"id":"15168","relation":"earlier_version","status":"public"}]},"acknowledgement":"This research was supported by the Charles University project PRIMUS/21/SCI/014, by the Ministry of Education, Youth\r\nand Sports of the Czech Republic under the project MSCAfellow5_MUNI (CZ.02.01.01/00/22_010/0003229), and by the\r\nAustrian Science Fund (FWF project P31312-N35). This research was funded by UKRI EP/X024431/1 and by a Clarendon\r\nFund Scholarship. This project has received funding from the European Union’s Horizon 2020 research and innovation\r\nprogramme under the Marie Skłodowska-Curie Grant Agreement No 101034413.\r\n","publication_status":"published","publication":"ACM Transactions on Computation Theory","article_number":"10","date_published":"2026-05-04T00:00:00Z","oa":1,"type":"journal_article","OA_place":"publisher","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"intvolume":"        18","citation":{"ama":"Filakovský M, Nakajima TV, Opršal J, Tasinato G, Wagner U. Hardness of linearly ordered 4-colouring of 3-colourable 3-uniform hypergraphs. <i>ACM Transactions on Computation Theory</i>. 2026;18(2). doi:<a href=\"https://doi.org/10.1145/3779121\">10.1145/3779121</a>","short":"M. Filakovský, T.V. Nakajima, J. Opršal, G. Tasinato, U. Wagner, ACM Transactions on Computation Theory 18 (2026).","chicago":"Filakovský, Marek, Tamio Vesa Nakajima, Jakub Opršal, Gianluca Tasinato, and Uli Wagner. “Hardness of Linearly Ordered 4-Colouring of 3-Colourable 3-Uniform Hypergraphs.” <i>ACM Transactions on Computation Theory</i>. Association for Computing Machinery, 2026. <a href=\"https://doi.org/10.1145/3779121\">https://doi.org/10.1145/3779121</a>.","ieee":"M. Filakovský, T. V. Nakajima, J. Opršal, G. Tasinato, and U. Wagner, “Hardness of linearly ordered 4-colouring of 3-colourable 3-uniform hypergraphs,” <i>ACM Transactions on Computation Theory</i>, vol. 18, no. 2. Association for Computing Machinery, 2026.","ista":"Filakovský M, Nakajima TV, Opršal J, Tasinato G, Wagner U. 2026. Hardness of linearly ordered 4-colouring of 3-colourable 3-uniform hypergraphs. ACM Transactions on Computation Theory. 18(2), 10.","apa":"Filakovský, M., Nakajima, T. V., Opršal, J., Tasinato, G., &#38; Wagner, U. (2026). Hardness of linearly ordered 4-colouring of 3-colourable 3-uniform hypergraphs. <i>ACM Transactions on Computation Theory</i>. Association for Computing Machinery. <a href=\"https://doi.org/10.1145/3779121\">https://doi.org/10.1145/3779121</a>","mla":"Filakovský, Marek, et al. “Hardness of Linearly Ordered 4-Colouring of 3-Colourable 3-Uniform Hypergraphs.” <i>ACM Transactions on Computation Theory</i>, vol. 18, no. 2, 10, Association for Computing Machinery, 2026, doi:<a href=\"https://doi.org/10.1145/3779121\">10.1145/3779121</a>."},"corr_author":"1","month":"05","researchdata_availability":"no","title":"Hardness of linearly ordered 4-colouring of 3-colourable 3-uniform hypergraphs","language":[{"iso":"eng"}],"has_accepted_license":"1","keyword":["Constraint satisfaction problem","hypergraph colouring","promise problem","topological methods"],"doi":"10.1145/3779121","department":[{"_id":"UlWa"}],"status":"public","project":[{"grant_number":"P31312","_id":"26611F5C-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Algorithms for Embeddings and Homotopy Theory"},{"grant_number":"101034413","_id":"fc2ed2f7-9c52-11eb-aca3-c01059dda49c","call_identifier":"H2020","name":"IST-BRIDGE: International postdoctoral program"}],"volume":18,"das_tickbox":"0","publisher":"Association for Computing Machinery","year":"2026","OA_type":"gold","article_processing_charge":"Yes","author":[{"full_name":"Filakovský, Marek","first_name":"Marek","id":"3E8AF77E-F248-11E8-B48F-1D18A9856A87","last_name":"Filakovský"},{"last_name":"Nakajima","full_name":"Nakajima, Tamio Vesa","first_name":"Tamio Vesa"},{"last_name":"Opršal","first_name":"Jakub","id":"ec596741-c539-11ec-b829-c79322a91242","full_name":"Opršal, Jakub","orcid":"0000-0003-1245-3456"},{"last_name":"Tasinato","full_name":"Tasinato, Gianluca","first_name":"Gianluca","id":"0433290C-AF8F-11E9-A4C7-F729E6697425"},{"last_name":"Wagner","orcid":"0000-0002-1494-0568","full_name":"Wagner, Uli","first_name":"Uli","id":"36690CA2-F248-11E8-B48F-1D18A9856A87"}],"issue":"2"},{"author":[{"first_name":"Hsien Chih","full_name":"Chang, Hsien Chih","last_name":"Chang"},{"last_name":"Conroy","first_name":"Jonathan","full_name":"Conroy, Jonathan"},{"first_name":"Zihan","full_name":"Tan, Zihan","last_name":"Tan"},{"last_name":"Zheng","id":"af77956b-e859-11ef-8dc9-d301b898e32f","first_name":"Da Wei","full_name":"Zheng, Da Wei"}],"article_processing_charge":"No","OA_type":"gold","publisher":"Association for Computing Machinery","year":"2026","das_tickbox":"0","status":"public","department":[{"_id":"MoHe"}],"doi":"10.1145/3798129.3800917","language":[{"iso":"eng"}],"title":"Cutting planarians: Planar emulators for string graphs","has_accepted_license":"1","researchdata_availability":"no","month":"06","citation":{"short":"H.C. Chang, J. Conroy, Z. Tan, D.W. Zheng, in:, 58th Annual ACM Symposium on Theory of Computing, Association for Computing Machinery, 2026, pp. 2140–2151.","ama":"Chang HC, Conroy J, Tan Z, Zheng DW. Cutting planarians: Planar emulators for string graphs. In: <i>58th Annual ACM Symposium on Theory of Computing</i>. Association for Computing Machinery; 2026:2140-2151. doi:<a href=\"https://doi.org/10.1145/3798129.3800917\">10.1145/3798129.3800917</a>","mla":"Chang, Hsien Chih, et al. “Cutting Planarians: Planar Emulators for String Graphs.” <i>58th Annual ACM Symposium on Theory of Computing</i>, Association for Computing Machinery, 2026, pp. 2140–51, doi:<a href=\"https://doi.org/10.1145/3798129.3800917\">10.1145/3798129.3800917</a>.","apa":"Chang, H. C., Conroy, J., Tan, Z., &#38; Zheng, D. W. (2026). Cutting planarians: Planar emulators for string graphs. In <i>58th Annual ACM Symposium on Theory of Computing</i> (pp. 2140–2151). Salt Lake City, UT, United States: Association for Computing Machinery. <a href=\"https://doi.org/10.1145/3798129.3800917\">https://doi.org/10.1145/3798129.3800917</a>","ista":"Chang HC, Conroy J, Tan Z, Zheng DW. 2026. Cutting planarians: Planar emulators for string graphs. 58th Annual ACM Symposium on Theory of Computing. STOC: Symposium on the Theory of Computing, 2140–2151.","ieee":"H. C. Chang, J. Conroy, Z. Tan, and D. W. Zheng, “Cutting planarians: Planar emulators for string graphs,” in <i>58th Annual ACM Symposium on Theory of Computing</i>, Salt Lake City, UT, United States, 2026, pp. 2140–2151.","chicago":"Chang, Hsien Chih, Jonathan Conroy, Zihan Tan, and Da Wei Zheng. “Cutting Planarians: Planar Emulators for String Graphs.” In <i>58th Annual ACM Symposium on Theory of Computing</i>, 2140–51. Association for Computing Machinery, 2026. <a href=\"https://doi.org/10.1145/3798129.3800917\">https://doi.org/10.1145/3798129.3800917</a>."},"corr_author":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"conference":{"start_date":"2026-06-22","end_date":"2026-06-26","location":"Salt Lake City, UT, United States","name":"STOC: Symposium on the Theory of Computing"},"quality_controlled":"1","page":"2140-2151","type":"conference","OA_place":"publisher","date_published":"2026-06-09T00:00:00Z","oa":1,"publication":"58th Annual ACM Symposium on Theory of Computing","publication_status":"published","acknowledgement":"Hsien-Chih Chang and Jonathan Conroy are supported by the U.S.\r\nNational Science Foundation CAREER Award under the Grant No.\r\nCCF-2443017.","scopus_import":"1","file_date_updated":"2026-07-06T10:23:09Z","date_updated":"2026-07-06T10:25:23Z","file":[{"file_size":2015699,"creator":"dernst","date_updated":"2026-07-06T10:23:09Z","content_type":"application/pdf","success":1,"file_id":"22253","date_created":"2026-07-06T10:23:09Z","file_name":"2026_STOC_Chang.pdf","relation":"main_file","access_level":"open_access","checksum":"c184596a3e18fee912caef4c7751a96d"}],"_id":"22246","ddc":["500","000"],"date_created":"2026-07-05T22:01:37Z","external_id":{"arxiv":["2510.21700"]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","supplementarymaterial":"no","abstract":[{"lang":"eng","text":"In this paper we construct distance sketches for intersection graphs of arbitrary path-connected regions in the plane (known as the string graphs) in the constant and 1+ε distortion regimes. Furthermore, the distance sketches themselves are planar graphs. First, we show that every unweighted string graph G has an O(1)-distortion planar emulator: that is, there exists an edge-weighted planar graph H containing every vertex in G, such that every pair of vertices (u,v) satisfies δG(u,v) ≤ δH(u,v) ≤ O(1) · δG(u,v). Furthermore, we show that for any constant ε > 0, there is an edge-weighted planar graph H′ such that every pair of vertices (u,v) satisfies δG(u,v) ≤ δH′(u,v) ≤ (1+ε) · δG(u,v) + O(ε−4polylogn). No previous constructions of sparse distance sketches were known even for intersection graphs of simple shapes like axis-parallel rectangles or fat convex polygons.\r\nAs applications, we construct the first (1+ε, +O(1)) mixed-distortion tree cover and distance oracle for arbitrary string graphs, as well as the first additive +(εΔ+O(1))-distortion embedding of string graphs G with diameter Δ into graphs of constant treewidth O(ε−4)."}],"arxiv":1,"oa_version":"Published Version","publication_identifier":{"isbn":["9798400725364"],"issn":["0737-8017"]},"day":"09"},{"OA_place":"repository","type":"dissertation","page":"110","date_published":"2026-03-11T00:00:00Z","publication_status":"published","supervisor":[{"last_name":"Hannezo","full_name":"Hannezo, Edouard B","orcid":"0000-0001-6005-1561","id":"3A9DB764-F248-11E8-B48F-1D18A9856A87","first_name":"Edouard B"}],"corr_author":"1","citation":{"short":"Z. Dunajova, Geometry-Driven Self-Organization of Migrating Cells and Chiral Filaments, Institute of Science and Technology Austria, 2026.","ama":"Dunajova Z. Geometry-driven self-organization of migrating cells and chiral filaments. 2026. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21423\">10.15479/AT-ISTA-21423</a>","mla":"Dunajova, Zuzana. <i>Geometry-Driven Self-Organization of Migrating Cells and Chiral Filaments</i>. Institute of Science and Technology Austria, 2026, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21423\">10.15479/AT-ISTA-21423</a>.","apa":"Dunajova, Z. (2026). <i>Geometry-driven self-organization of migrating cells and chiral filaments</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-21423\">https://doi.org/10.15479/AT-ISTA-21423</a>","ista":"Dunajova Z. 2026. Geometry-driven self-organization of migrating cells and chiral filaments. Institute of Science and Technology Austria.","ieee":"Z. Dunajova, “Geometry-driven self-organization of migrating cells and chiral filaments,” Institute of Science and Technology Austria, 2026.","chicago":"Dunajova, Zuzana. “Geometry-Driven Self-Organization of Migrating Cells and Chiral Filaments.” Institute of Science and Technology Austria, 2026. <a href=\"https://doi.org/10.15479/AT-ISTA-21423\">https://doi.org/10.15479/AT-ISTA-21423</a>."},"alternative_title":["ISTA Thesis"],"tmp":{"short":"CC BY-NC-SA (4.0)","name":"Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","image":"/images/cc_by_nc_sa.png","legal_code_url":"https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode"},"date_created":"2026-03-11T08:30:49Z","ddc":["539","570"],"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","oa_version":"Published Version","day":"11","publication_identifier":{"isbn":["978-3-99078-076-3"],"issn":["2663-337X"]},"related_material":{"record":[{"relation":"part_of_dissertation","id":"13314","status":"public"},{"relation":"research_data","id":"13116","status":"public"},{"id":"21439","relation":"research_data","status":"public"},{"id":"21427","relation":"part_of_dissertation","status":"public"}]},"degree_awarded":"PhD","acknowledgement":"Finally, I gratefully acknowledge funding from the DOC Fellowship of the Austrian Academy\r\nof Sciences (OeAW): grant agreement 26360.","license":"https://creativecommons.org/licenses/by-nc-sa/4.0/","file_date_updated":"2026-03-13T11:19:21Z","file":[{"checksum":"47ce6a48a0c63f28eca6e64c9ffd2c84","access_level":"closed","embargo_to":"open_access","date_created":"2026-03-12T20:38:52Z","relation":"main_file","file_name":"2026_Dunajova_Zuzana_Thesis_pdfA.pdf","date_updated":"2026-03-12T20:38:52Z","content_type":"application/pdf","embargo":"2026-09-11","file_id":"21446","file_size":14662770,"creator":"zdunajov"},{"access_level":"closed","checksum":"5dec5afdffd47c2b0b162d0fe1bed925","relation":"source_file","file_name":"Thesis-Dunajova_source_file.docx","date_created":"2026-03-12T20:40:18Z","file_id":"21447","content_type":"application/vnd.openxmlformats-officedocument.wordprocessingml.document","date_updated":"2026-03-13T11:19:21Z","creator":"zdunajov","file_size":32961408}],"date_updated":"2026-07-06T12:38:16Z","_id":"21423","acknowledged_ssus":[{"_id":"ScienComp"}],"author":[{"full_name":"Dunajova, Zuzana","id":"4B39F286-F248-11E8-B48F-1D18A9856A87","first_name":"Zuzana","last_name":"Dunajova"}],"article_processing_charge":"No","status":"public","doi":"10.15479/AT-ISTA-21423","department":[{"_id":"GradSch"},{"_id":"EdHa"}],"has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Geometry-driven self-organization of migrating cells and chiral filaments","month":"03","year":"2026","publisher":"Institute of Science and Technology Austria","project":[{"_id":"34d75525-11ca-11ed-8bc3-89b6307fee9d","grant_number":"26360","name":"Motile active matter models of migrating cells and chiral filaments"}]},{"acknowledged_ssus":[{"_id":"Bio"},{"_id":"ScienComp"}],"OA_type":"free access","article_processing_charge":"No","author":[{"last_name":"Dunajova","id":"4B39F286-F248-11E8-B48F-1D18A9856A87","first_name":"Zuzana","full_name":"Dunajova, Zuzana"}],"month":"03","title":"Supplementary movies to PhD thesis “Geometry-driven self-organization of migrating cells and chiral filaments”","has_accepted_license":"1","doi":"10.15479/AT-ISTA-21439","department":[{"_id":"GradSch"},{"_id":"EdHa"}],"status":"public","project":[{"name":"Motile active matter models of migrating cells and chiral filaments","grant_number":"26360","_id":"34d75525-11ca-11ed-8bc3-89b6307fee9d"}],"year":"2026","publisher":"Institute of Science and Technology Austria","contributor":[{"contributor_type":"researcher","last_name":"Tasciyan","id":"4323B49C-F248-11E8-B48F-1D18A9856A87","first_name":"Saren","orcid":"0000-0003-1671-393X"},{"orcid":"0000-0001-9198-2182 ","id":"40136C2A-F248-11E8-B48F-1D18A9856A87","first_name":"Philipp","last_name":"Radler","contributor_type":"researcher"}],"date_published":"2026-03-12T00:00:00Z","oa":1,"type":"research_data","OA_place":"repository","tmp":{"short":"CC BY-NC-SA (4.0)","name":"Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","image":"/images/cc_by_nc_sa.png","legal_code_url":"https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode"},"citation":{"chicago":"Dunajova, Zuzana. “Supplementary Movies to PhD Thesis ‘Geometry-Driven Self-Organization of Migrating Cells and Chiral Filaments.’” Institute of Science and Technology Austria, 2026. <a href=\"https://doi.org/10.15479/AT-ISTA-21439\">https://doi.org/10.15479/AT-ISTA-21439</a>.","ista":"Dunajova Z. 2026. Supplementary movies to PhD thesis “Geometry-driven self-organization of migrating cells and chiral filaments”, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT-ISTA-21439\">10.15479/AT-ISTA-21439</a>.","apa":"Dunajova, Z. (2026). Supplementary movies to PhD thesis “Geometry-driven self-organization of migrating cells and chiral filaments.” Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-21439\">https://doi.org/10.15479/AT-ISTA-21439</a>","ieee":"Z. Dunajova, “Supplementary movies to PhD thesis ‘Geometry-driven self-organization of migrating cells and chiral filaments.’” Institute of Science and Technology Austria, 2026.","mla":"Dunajova, Zuzana. <i>Supplementary Movies to PhD Thesis “Geometry-Driven Self-Organization of Migrating Cells and Chiral Filaments.”</i> Institute of Science and Technology Austria, 2026, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21439\">10.15479/AT-ISTA-21439</a>.","ama":"Dunajova Z. Supplementary movies to PhD thesis “Geometry-driven self-organization of migrating cells and chiral filaments.” 2026. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-21439\">10.15479/AT-ISTA-21439</a>","short":"Z. Dunajova, (2026)."},"corr_author":"1","day":"12","oa_version":"Published Version","user_id":"68b8ca59-c5b3-11ee-8790-cd641c68093d","abstract":[{"text":"These files contain supplementary movies accompanying the PhD thesis “Geometry-driven self-organization of migrating cells and chiral filaments” by Zuzana Dunajova (2026). The videos provide additional visual material supporting the experiments and results described in the thesis.","lang":"eng"}],"ddc":["570"],"date_created":"2026-03-11T21:05:20Z","_id":"21439","date_updated":"2026-07-06T12:38:16Z","file":[{"checksum":"47809a9a31b748b16e21e92d11ddc87f","access_level":"open_access","date_created":"2026-03-11T20:41:28Z","file_name":"Supplementary_movies_Thesis_Dunajova.zip","relation":"main_file","success":1,"content_type":"application/zip","date_updated":"2026-03-11T20:41:28Z","file_id":"21440","file_size":154465214,"creator":"zdunajov"},{"file_id":"21441","success":1,"content_type":"text/plain","date_updated":"2026-03-11T20:52:39Z","creator":"zdunajov","file_size":2289,"checksum":"a64a174bc6abf0a5e77631e4fd121f1f","access_level":"open_access","relation":"main_file","file_name":"readme.txt","date_created":"2026-03-11T20:52:39Z"}],"file_date_updated":"2026-03-11T20:52:39Z","related_material":{"record":[{"relation":"used_in_publication","id":"13314","status":"public"},{"relation":"used_in_publication","id":"21423","status":"public"},{"id":"21427","relation":"used_in_publication","status":"public"}]}},{"issue":"1","author":[{"full_name":"Yoon, Arim","first_name":"Arim","last_name":"Yoon"},{"full_name":"Hohenegger, Cathy","first_name":"Cathy","last_name":"Hohenegger"},{"last_name":"Bao","id":"bb9a7399-fefd-11ed-be3c-ae648fd1d160","first_name":"Jiawei","full_name":"Bao, Jiawei"},{"first_name":"Lukas","full_name":"Brunner, Lukas","last_name":"Brunner"}],"article_processing_charge":"Yes (via OA deal)","OA_type":"gold","year":"2026","publisher":"Copernicus Publications","das_tickbox":"1","volume":17,"status":"public","department":[{"_id":"CaMu"}],"doi":"10.5194/esd-17-167-2026","has_accepted_license":"1","language":[{"iso":"eng"}],"title":"Extreme events in the Amazon after deforestation","month":"02","citation":{"mla":"Yoon, Arim, et al. “Extreme Events in the Amazon after Deforestation.” <i>Earth System Dynamics</i>, vol. 17, no. 1, Copernicus Publications, 2026, pp. 167–79, doi:<a href=\"https://doi.org/10.5194/esd-17-167-2026\">10.5194/esd-17-167-2026</a>.","apa":"Yoon, A., Hohenegger, C., Bao, J., &#38; Brunner, L. (2026). Extreme events in the Amazon after deforestation. <i>Earth System Dynamics</i>. Copernicus Publications. <a href=\"https://doi.org/10.5194/esd-17-167-2026\">https://doi.org/10.5194/esd-17-167-2026</a>","ieee":"A. Yoon, C. Hohenegger, J. Bao, and L. Brunner, “Extreme events in the Amazon after deforestation,” <i>Earth System Dynamics</i>, vol. 17, no. 1. Copernicus Publications, pp. 167–179, 2026.","ista":"Yoon A, Hohenegger C, Bao J, Brunner L. 2026. Extreme events in the Amazon after deforestation. Earth System Dynamics. 17(1), 167–179.","chicago":"Yoon, Arim, Cathy Hohenegger, Jiawei Bao, and Lukas Brunner. “Extreme Events in the Amazon after Deforestation.” <i>Earth System Dynamics</i>. Copernicus Publications, 2026. <a href=\"https://doi.org/10.5194/esd-17-167-2026\">https://doi.org/10.5194/esd-17-167-2026</a>.","short":"A. Yoon, C. Hohenegger, J. Bao, L. Brunner, Earth System Dynamics 17 (2026) 167–179.","ama":"Yoon A, Hohenegger C, Bao J, Brunner L. Extreme events in the Amazon after deforestation. <i>Earth System Dynamics</i>. 2026;17(1):167-179. doi:<a href=\"https://doi.org/10.5194/esd-17-167-2026\">10.5194/esd-17-167-2026</a>"},"intvolume":"        17","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"OA_place":"publisher","type":"journal_article","page":"167-179","oa":1,"date_published":"2026-02-04T00:00:00Z","publication":"Earth System Dynamics","publication_status":"published","acknowledgement":"AY acknowledges funding by the CLICCS centre of excellence subproject A3 funded by DFG. We thank the German Climate Computing Center DKRZ for providing computing resources and the Integrated Climate Data Center (ICDC), the Center for Earth System Research and Sustainability (CEN), University of Hamburg, for supporting the IMERG data. In addition, we would like to thank Jana Sillmann for suggesting the analysis of heat stress indices and Keno Riechers for providing a thorough internal review of the initial manuscript at the Max Planck Institute for Meteorology. Open Access funding is enabled and organized by Projekt DEAL. This research has been supported by the Deutsche Forschungsgemeinschaft (grant no. CLICCS 390683824 (A3)). The article processing charges for this open-access publication were covered by the Max Planck Society.","scopus_import":"1","file_date_updated":"2026-02-23T10:26:29Z","DOAJ_listed":"1","date_updated":"2026-07-06T12:55:02Z","file":[{"file_size":2068229,"creator":"dernst","content_type":"application/pdf","date_updated":"2026-02-23T10:26:29Z","success":1,"file_id":"21348","date_created":"2026-02-23T10:26:29Z","file_name":"2026_EarthSystDynam_Yoon.pdf","relation":"main_file","access_level":"open_access","checksum":"6c3669c463731ad7c484b2990eb8ee0d"}],"_id":"21233","date_created":"2026-02-16T10:44:58Z","ddc":["550"],"abstract":[{"text":"Potential self-perpetuating dieback of the Amazon rain forest has been a topic of concern. The concern is that initial deforestation could critically impair the forest’s water recycling capacities, further harming the remaining forest through reduced annual precipitation. Many studies have focused on annual mean precipitation changes, due to its widespread perception as a central control on the Amazon rain forest’s stability. However, the impact of deforestation goes beyond changes in the annual mean precipitation. Yet, global coarse-resolution climate models are not well suited to investigate changes in short-duration and localized events due to their coarse resolution. Here, we circumvent these issues by analyzing a full-deforestation scenario simulated by a global storm-resolving model. We focus on changes in the tail of the hourly distribution of precipitation, temperature, and wind. Hourly precipitation becomes more extreme in the absence of the forest than in an intact forest, with an increased occurrence of both no rain and intense rainfall. These changes are driven by enhanced moisture convergence that strengthens vertical velocity. On average, the near-surface temperature rises significantly by about 3.84 °C, and the daily minimum temperature after deforestation becomes similar to the daily maximum temperature before deforestation. Except for wet-bulb temperature, human heat stress indicators shift to more severe levels, with implications for health and a significant reduction in work productivity. Finally, the mean 10 m wind speed intensifies by a factor of four, with the 99th percentile wind speed doubling. To summarize, our findings, while based on an idealized case, provide a stark warning of the effects of continuing deforestation of the Amazon.","lang":"eng"}],"article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","PlanS_conform":"1","oa_version":"Published Version","publication_identifier":{"eissn":["2190-4987"]},"day":"04"},{"das_tickbox":"1","publisher":"EDP Sciences","year":"2026","volume":706,"doi":"10.1051/0004-6361/202557568","department":[{"_id":"IlCa"}],"status":"public","month":"02","has_accepted_license":"1","title":"The evolutionary history of ultra-compact accreting binaries: I. Chemical abundances and the formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy","language":[{"iso":"eng"}],"article_processing_charge":"No","author":[{"first_name":"W.","full_name":"Yu, W.","last_name":"Yu"},{"first_name":"A. F.","full_name":"Pala, A. F.","last_name":"Pala"},{"last_name":"Kupfer","full_name":"Kupfer, T.","first_name":"T."},{"last_name":"Gänsicke","first_name":"B. T.","full_name":"Gänsicke, B. T."},{"first_name":"D.","full_name":"Koester, D.","last_name":"Koester"},{"first_name":"D.","full_name":"Belloni, D.","last_name":"Belloni"},{"last_name":"Wong","full_name":"Wong, T. L.S.","first_name":"T. L.S."},{"last_name":"Schreiber","full_name":"Schreiber, M. R.","first_name":"M. R."},{"first_name":"Joannes C","id":"4d122fc8-6083-11f0-87a5-97d68b860333","full_name":"van Roestel, Joannes C","last_name":"van Roestel"},{"full_name":"Brown, A. J.","first_name":"A. J.","last_name":"Brown"},{"last_name":"Waagen","full_name":"Waagen, E. O.","first_name":"E. O."},{"last_name":"González-Carballo","first_name":"J. L.","full_name":"González-Carballo, J. L."},{"first_name":"S.","full_name":"Bednarz, S.","last_name":"Bednarz"},{"last_name":"Bernacki","first_name":"K.","full_name":"Bernacki, K."},{"first_name":"D.","full_name":"De Martino, D.","last_name":"De Martino"},{"last_name":"Fernández Mañanes","full_name":"Fernández Mañanes, E.","first_name":"E."},{"last_name":"González Farfán","full_name":"González Farfán, R.","first_name":"R."},{"full_name":"Green, M. J.","first_name":"M. J.","last_name":"Green"},{"last_name":"Groot","first_name":"P. J.","full_name":"Groot, P. J."},{"last_name":"Hambsch","full_name":"Hambsch, F. J.","first_name":"F. J."},{"full_name":"Knigge, C.","first_name":"C.","last_name":"Knigge"},{"last_name":"Martin-Velasco","first_name":"J. L.","full_name":"Martin-Velasco, J. L."},{"first_name":"M.","full_name":"Morales-Aimar, M.","last_name":"Morales-Aimar"},{"last_name":"Myers","full_name":"Myers, G.","first_name":"G."},{"full_name":"Naves Nogues, R.","first_name":"R.","last_name":"Naves Nogues"},{"first_name":"R.","full_name":"Poggiani, R.","last_name":"Poggiani"},{"last_name":"Popowicz","full_name":"Popowicz, A.","first_name":"A."},{"first_name":"G.","full_name":"Ramsay, G.","last_name":"Ramsay"},{"last_name":"Reina-Lorenz","full_name":"Reina-Lorenz, E.","first_name":"E."},{"full_name":"Rodríguez-Gil, P.","first_name":"P.","last_name":"Rodríguez-Gil"},{"first_name":"J. L.","full_name":"Salto-González, J. L.","last_name":"Salto-González"},{"last_name":"Sion","first_name":"E. M.","full_name":"Sion, E. M."},{"last_name":"Steeghs","first_name":"D.","full_name":"Steeghs, D."},{"first_name":"P.","full_name":"Szkody, P.","last_name":"Szkody"},{"full_name":"Toloza, O.","first_name":"O.","last_name":"Toloza"},{"last_name":"Tovmassian","full_name":"Tovmassian, G.","first_name":"G."}],"OA_type":"diamond","scopus_import":"1","acknowledgement":"We thank Lars Bildsten for valuable insights and discussions. We acknowledge with thanks the variable star observations from the\r\nAAVSO International Database contributed by observers worldwide and used in this research. We thank the members of the Spanish Observers of Supernovae\r\n(ObSN) group for their valuable photometric contributions. This research was\r\nsupported by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC 2121 “Quantum Universe”\r\n– 390833306. Co-funded by the European Union (ERC, CompactBINARIES,\r\n101078773). Views and opinions expressed are however those of the author(s)\r\nonly and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority\r\ncan be held responsible for them. DB acknowledges support from the São Paulo\r\nResearch Foundation (FAPESP), Brazil, Process Numbers #2024/03736-2 and\r\n#2025/00817-4. MRS is supported by Fondecyt (grant 1221059). MJG acknowledges support from the European Research Council through ERC Advanced\r\nGrant No. 101054731, from the National Aeronautics and Space Administration under grants 80NSSC24K0436, 80NSSC22K0479, and 80NSSC24K0380,\r\nand from the National Science Foundation under grant AST-2205736. PJG\r\nis supported by NRF SARChI grant 111692. PR-G acknowledges support by\r\nthe Agencia Estatal de Investigación del Ministerio de Ciencia e Innovación\r\n(MCIN/AEI) and the European Regional Development Fund (ERDF) under grant\r\nPID2021–124879NB–I00. DS is supported by the UK Science and Technology Facilities Council (STFC, grant numbers ST/T007184/1, ST/T003103/1,\r\nand ST/T000406/1). OT acknowledges Proyectos Internos USM 2025, PI-LII2025-03. GT was supported by grants IN109723 from the Programa de Apoyo a\r\nProyectos de Investigación e Innovación Tecnológica (PAPIIT). This project has\r\nreceived funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No. 101020057).","_id":"21160","file":[{"file_size":4020466,"creator":"dernst","success":1,"content_type":"application/pdf","date_updated":"2026-02-16T09:33:56Z","file_id":"21227","date_created":"2026-02-16T09:33:56Z","file_name":"2026_AstronomyAstrophysics_Yu.pdf","relation":"main_file","checksum":"2faec710fd04f927aa43deb57e35c9b2","access_level":"open_access"}],"date_updated":"2026-07-08T06:38:46Z","file_date_updated":"2026-02-16T09:33:56Z","abstract":[{"lang":"eng","text":"Context. AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf primary accreting from a hydrogen-deficient donor. They play a crucial role in astrophysics as potential progenitors of Type Ia supernovae and as laboratories for gravitational wave studies. However, their formation and evolutionary history remain incomplete. Three formation channels have been discussed in the literature: the white dwarf, He-star, and cataclysmic variable channels.\r\n\r\nAims. The chemical composition of the accretor atmosphere reflects the material transferred from the donor. In this work we took the first accurate measurements of the fundamental parameters of the accreting white dwarf in ZTF J225237.05−051917.4, including the abundances of key elements such as carbon, nitrogen, and silicon, by analysing ultraviolet spectra obtained with the Hubble Space Telescope (HST). These measurements provide new insight into the evolutionary history of the system and, together with existing optical observations, establish it as a benchmark to develop our pipeline, paving the way for its application to a larger sample of AM CVn systems.\r\n\r\nMethods. We determined the binary parameters through photometric analysis and constrained the atmospheric parameters of the white dwarf accretor, including its effective temperature, surface gravity, and chemical abundances, by fitting the HST ultraviolet spectrum with synthetic spectral models. We then inferred the system’s formation channel by comparing the results with theoretical evolutionary models.\r\n\r\nResults. According to our measurements, the accretor’s effective temperature (Teff) is 23 300 ± 600 K and the surface gravity (log g) is 8.4 ± 0.3, which imply an accretor mass (MWD) of 0.86 ± 0.16 M⊙. We find a high nitrogen-to-carbon abundance ratio by mass of > 153.\r\n\r\nConclusions. The accretor is significantly hotter than previous estimates based on simplified blackbody fits to the spectral energy distribution, underscoring the importance of detailed spectral modelling for accurately determining system parameters. Our results show that ultraviolet spectroscopy is well suited to constraining the formation channels of AM CVn systems. Of the three proposed formation channels, the He-star channel can be excluded given the high nitrogen-to-carbon ratio. Our results are consistent with both the white dwarf and cataclysmic variable channels."}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","date_created":"2026-02-08T23:02:49Z","external_id":{"arxiv":["2512.04147"]},"ddc":["520"],"day":"01","publication_identifier":{"issn":["0004-6361"],"eissn":["1432-0746"]},"PlanS_conform":"1","arxiv":1,"oa_version":"Published Version","intvolume":"       706","citation":{"chicago":"Yu, W., A. F. Pala, T. Kupfer, B. T. Gänsicke, D. Koester, D. Belloni, T. L.S. Wong, et al. “The Evolutionary History of Ultra-Compact Accreting Binaries: I. Chemical Abundances and the Formation Channel of the Eclipsing AM CVn System ZTF J225237.05-051917.4 from HST Spectroscopy.” <i>Astronomy &#38; Astrophysics</i>. EDP Sciences, 2026. <a href=\"https://doi.org/10.1051/0004-6361/202557568\">https://doi.org/10.1051/0004-6361/202557568</a>.","ieee":"W. Yu <i>et al.</i>, “The evolutionary history of ultra-compact accreting binaries: I. Chemical abundances and the formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy,” <i>Astronomy &#38; Astrophysics</i>, vol. 706. EDP Sciences, 2026.","ista":"Yu W, Pala AF, Kupfer T, Gänsicke BT, Koester D, Belloni D, Wong TLS, Schreiber MR, van Roestel JC, Brown AJ, Waagen EO, González-Carballo JL, Bednarz S, Bernacki K, De Martino D, Fernández Mañanes E, González Farfán R, Green MJ, Groot PJ, Hambsch FJ, Knigge C, Martin-Velasco JL, Morales-Aimar M, Myers G, Naves Nogues R, Poggiani R, Popowicz A, Ramsay G, Reina-Lorenz E, Rodríguez-Gil P, Salto-González JL, Sion EM, Steeghs D, Szkody P, Toloza O, Tovmassian G. 2026. The evolutionary history of ultra-compact accreting binaries: I. Chemical abundances and the formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy. Astronomy &#38; Astrophysics. 706, A14.","apa":"Yu, W., Pala, A. F., Kupfer, T., Gänsicke, B. T., Koester, D., Belloni, D., … Tovmassian, G. (2026). The evolutionary history of ultra-compact accreting binaries: I. Chemical abundances and the formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy. <i>Astronomy &#38; Astrophysics</i>. EDP Sciences. <a href=\"https://doi.org/10.1051/0004-6361/202557568\">https://doi.org/10.1051/0004-6361/202557568</a>","mla":"Yu, W., et al. “The Evolutionary History of Ultra-Compact Accreting Binaries: I. Chemical Abundances and the Formation Channel of the Eclipsing AM CVn System ZTF J225237.05-051917.4 from HST Spectroscopy.” <i>Astronomy &#38; Astrophysics</i>, vol. 706, A14, EDP Sciences, 2026, doi:<a href=\"https://doi.org/10.1051/0004-6361/202557568\">10.1051/0004-6361/202557568</a>.","ama":"Yu W, Pala AF, Kupfer T, et al. The evolutionary history of ultra-compact accreting binaries: I. Chemical abundances and the formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy. <i>Astronomy &#38; Astrophysics</i>. 2026;706. doi:<a href=\"https://doi.org/10.1051/0004-6361/202557568\">10.1051/0004-6361/202557568</a>","short":"W. Yu, A.F. Pala, T. Kupfer, B.T. Gänsicke, D. Koester, D. Belloni, T.L.S. Wong, M.R. Schreiber, J.C. van Roestel, A.J. Brown, E.O. Waagen, J.L. González-Carballo, S. Bednarz, K. Bernacki, D. De Martino, E. Fernández Mañanes, R. González Farfán, M.J. Green, P.J. Groot, F.J. Hambsch, C. Knigge, J.L. Martin-Velasco, M. Morales-Aimar, G. Myers, R. Naves Nogues, R. Poggiani, A. Popowicz, G. Ramsay, E. Reina-Lorenz, P. Rodríguez-Gil, J.L. Salto-González, E.M. Sion, D. Steeghs, P. Szkody, O. Toloza, G. Tovmassian, Astronomy &#38; Astrophysics 706 (2026)."},"quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"oa":1,"date_published":"2026-02-01T00:00:00Z","OA_place":"publisher","type":"journal_article","publication_status":"published","article_number":"A14","publication":"Astronomy & Astrophysics"},{"PlanS_conform":"1","arxiv":1,"oa_version":"Published Version","publication_identifier":{"issn":["0004-6361"],"eissn":["1432-0746"]},"day":"14","date_created":"2026-01-25T23:01:41Z","external_id":{"arxiv":["2505.09542"]},"ddc":["520"],"abstract":[{"text":"The abundant population of little red dots (LRDs), compact objects with red UV to optical colors and broad Balmer lines at high redshift, is revealing new insights into the properties of early active galactic nuclei (AGN). Perhaps the most surprising features of this population are the presence of Balmer absorption and ubiquitous strong Balmer breaks. Recent models link these features to an active supermassive black hole (SMBH) cocooned in very dense gas (NH ∼ 1024 cm−2). We present a stringent test of such models using VLT/MUSE observations of A2744-45924, the most luminous LRD known to date (LHα ≈ 1044 erg s−1), located behind the Abell-2744 lensing cluster at z = 4.464 (μ = 1.8). We detect a moderately extended Lyα nebula (h ≈ 5.7 pkpc), spatially offset from the point-like Hα seen by JWST by ≈1.6 pkpc. The Lyα emission is narrow (FWHM = 270 ± 15 km s−1), and faint (Lyα = 0.07Hα) compared to Lyα nebulae typically observed around quasars of similar luminosity. We detect compact N IV]λ1486 emission, spatially aligned with Hα, and a spatial shift in the far-UV continuum matching the Lyα offset. We discuss that Hα and Lyα have distinct physical origins: Hα originates from the AGN, while Lyα is powered by star formation. In the environment of A2744-45924, we identified four extended Lyα halos (Δz < 0.02, Δr < 100 pkpc). Their Lyα luminosities match the expectations based on Hα emission, and show no evidence for radiation from A2744-45924 affecting its surroundings. The lack of strong, compact, and broad Lyα and the absence of a luminous extended halo, suggest that the UV AGN light is obscured by dense gas cloaking the SMBH with a covering factor close to unity.","lang":"eng"}],"article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","file":[{"file_id":"21224","success":1,"content_type":"application/pdf","date_updated":"2026-02-16T07:35:03Z","creator":"dernst","file_size":2259914,"checksum":"3782e03bc0843438aae8487f6af779c5","access_level":"open_access","relation":"main_file","file_name":"2026_AstronomyAstrophysics_Torralba.pdf","date_created":"2026-02-16T07:35:03Z"}],"file_date_updated":"2026-02-16T07:35:03Z","date_updated":"2026-07-08T06:38:23Z","_id":"21045","acknowledgement":"We thank the anonymous referee for constructive and useful comments. We thank Sebastiano Cantalupo for comments on the draft. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 114.27M6.001. Funded by the European Union (ERC, AGENTS, 101076224). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. We acknowledge funding from JWST program GO-3516. This work is based in part on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #3516. MG thanks the Max Planck Society for support through the MPRG. FDE acknowledges support by the Science and Technology Facilities Council (STFC), by the ERC through Advanced Grant 695671 “QUENCH”, and by the UKRI Frontier Research grant RISEandFALL. TU acknowledges funding from the ERC-AdG grant SPECMAP-CGM, GA 101020943. GK acknowledges support from the MERAC foundation.","scopus_import":"1","publication":"Astronomy & Astrophysics","article_number":"A147","publication_status":"published","OA_place":"publisher","type":"journal_article","oa":1,"date_published":"2026-01-14T00:00:00Z","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"corr_author":"1","citation":{"mla":"Torralba Torregrosa, Alberto, et al. “A Weak Ly α Halo for an Extremely Bright Little Red Dot. Indications of Enshrouded Supermassive Black Hole Growth.” <i>Astronomy &#38; Astrophysics</i>, vol. 705, A147, EDP Sciences, 2026, doi:<a href=\"https://doi.org/10.1051/0004-6361/202555596\">10.1051/0004-6361/202555596</a>.","chicago":"Torralba Torregrosa, Alberto, Jorryt J Matthee, Gabriele Pezzulli, Tanya Urrutia, Max Gronke, Sara Mascia, Francesco D’Eugenio, et al. “A Weak Ly α Halo for an Extremely Bright Little Red Dot. Indications of Enshrouded Supermassive Black Hole Growth.” <i>Astronomy &#38; Astrophysics</i>. EDP Sciences, 2026. <a href=\"https://doi.org/10.1051/0004-6361/202555596\">https://doi.org/10.1051/0004-6361/202555596</a>.","ieee":"A. Torralba Torregrosa <i>et al.</i>, “A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth,” <i>Astronomy &#38; Astrophysics</i>, vol. 705. EDP Sciences, 2026.","apa":"Torralba Torregrosa, A., Matthee, J. J., Pezzulli, G., Urrutia, T., Gronke, M., Mascia, S., … Kotiwale, G. (2026). A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth. <i>Astronomy &#38; Astrophysics</i>. EDP Sciences. <a href=\"https://doi.org/10.1051/0004-6361/202555596\">https://doi.org/10.1051/0004-6361/202555596</a>","ista":"Torralba Torregrosa A, Matthee JJ, Pezzulli G, Urrutia T, Gronke M, Mascia S, D’Eugenio F, Di Cesare C, Eilers AC, Greene JE, Iani E, Ishikawa Y, Mackenzie R, Naidu RP, Navarrete B, Kotiwale G. 2026. A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth. Astronomy &#38; Astrophysics. 705, A147.","ama":"Torralba Torregrosa A, Matthee JJ, Pezzulli G, et al. A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth. <i>Astronomy &#38; Astrophysics</i>. 2026;705. doi:<a href=\"https://doi.org/10.1051/0004-6361/202555596\">10.1051/0004-6361/202555596</a>","short":"A. Torralba Torregrosa, J.J. Matthee, G. Pezzulli, T. Urrutia, M. Gronke, S. Mascia, F. D’Eugenio, C. Di Cesare, A.C. Eilers, J.E. Greene, E. Iani, Y. Ishikawa, R. Mackenzie, R.P. Naidu, B. Navarrete, G. Kotiwale, Astronomy &#38; Astrophysics 705 (2026)."},"intvolume":"       705","has_accepted_license":"1","title":"A weak Ly α halo for an extremely bright little red dot. Indications of enshrouded supermassive black hole growth","language":[{"iso":"eng"}],"month":"01","status":"public","doi":"10.1051/0004-6361/202555596","department":[{"_id":"JoMa"},{"_id":"GradSch"}],"volume":705,"project":[{"name":"Young galaxies as tracers and agents of cosmic reionization","grant_number":"101076224","_id":"bd9b2118-d553-11ed-ba76-db24564edfea"}],"publisher":"EDP Sciences","year":"2026","das_tickbox":"1","OA_type":"diamond","author":[{"first_name":"Alberto","id":"018f0249-0e87-11f0-b167-cbce08fbd541","full_name":"Torralba Torregrosa, Alberto","orcid":"0000-0001-5586-6950","last_name":"Torralba Torregrosa"},{"last_name":"Matthee","full_name":"Matthee, Jorryt J","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J"},{"last_name":"Pezzulli","first_name":"Gabriele","full_name":"Pezzulli, Gabriele"},{"last_name":"Urrutia","first_name":"Tanya","full_name":"Urrutia, Tanya"},{"first_name":"Max","full_name":"Gronke, Max","last_name":"Gronke"},{"first_name":"Sara","id":"edaf889c-c7cd-11ef-ab1b-bb28c431bd29","full_name":"Mascia, Sara","last_name":"Mascia"},{"last_name":"D’Eugenio","full_name":"D’Eugenio, Francesco","first_name":"Francesco"},{"last_name":"Di Cesare","full_name":"Di Cesare, Claudia","first_name":"Claudia","id":"2d002343-372f-11ef-98ec-a164d20427cb"},{"last_name":"Eilers","first_name":"Anna Christina","full_name":"Eilers, Anna Christina"},{"last_name":"Greene","first_name":"Jenny E.","full_name":"Greene, Jenny E."},{"first_name":"Edoardo","id":"4053390a-6b68-11ef-9828-a3b8adef8d0a","full_name":"Iani, Edoardo","orcid":"0000-0001-8386-3546","last_name":"Iani"},{"first_name":"Yuzo","full_name":"Ishikawa, Yuzo","last_name":"Ishikawa"},{"last_name":"Mackenzie","full_name":"Mackenzie, Ruari","first_name":"Ruari"},{"first_name":"Rohan P.","full_name":"Naidu, Rohan P.","last_name":"Naidu"},{"last_name":"Navarrete","id":"aa14a535-50c9-11ef-b52e-e0c373d10148","first_name":"Benjamín","full_name":"Navarrete, Benjamín"},{"full_name":"Kotiwale, Gauri","id":"1438afc8-1ff6-11ee-9fa6-cd4a75d66875","first_name":"Gauri","last_name":"Kotiwale"}],"article_processing_charge":"No"},{"status":"public","doi":"10.1051/0004-6361/202558023","department":[{"_id":"LiBu"},{"_id":"IlCa"},{"_id":"GradSch"}],"language":[{"iso":"eng"}],"title":"Near-degeneracy effects in quadrupolar mixed modes: From an asymptotic description to data fitting","has_accepted_license":"1","month":"03","publisher":"EDP Sciences","year":"2026","das_tickbox":"1","volume":707,"OA_type":"diamond","author":[{"first_name":"Bastien Raymond Bernard","id":"662f1873-cab4-11f0-a719-8087d302868d","full_name":"Liagre, Bastien Raymond Bernard","last_name":"Liagre"},{"last_name":"Desai","first_name":"Aayush A","id":"502cfd30-32c1-11ee-a9a4-d8dad5c6739e","full_name":"Desai, Aayush A"},{"full_name":"Einramhof, Lukas","id":"f1497a1a-72ef-11ef-b75a-fd877bbf6e8c","first_name":"Lukas","last_name":"Einramhof"},{"full_name":"Bugnet, Lisa Annabelle","orcid":"0000-0003-0142-4000","first_name":"Lisa Annabelle","id":"d9edb345-f866-11ec-9b37-d119b5234501","last_name":"Bugnet"}],"article_processing_charge":"No","ddc":["520"],"date_created":"2026-04-05T22:01:32Z","external_id":{"arxiv":["2511.05314 "]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","abstract":[{"lang":"eng","text":"Dipolar (ℓ = 1) mixed modes have revealed a surprisingly weak differential rotation between the core and the envelope of evolved solar-like stars. Quadrupolar (ℓ = 2) mixed modes also contain information regarding internal dynamics but are very rarely characterised due to their low amplitude and the challenging identification of adjacent or overlapping rotationally split multiplets affected by near-degeneracy effects. We aim to extend the broadly used asymptotic seismic diagnostics beyond ℓ = 1 mixed modes by developing an analogue asymptotic description of ℓ = 2 mixed modes while explicitly accounting for near-degeneracy effects that distort their rotational multiplets. We have derived a new asymptotic formulation of near-degenerate mixed ℓ = 2 modes that describes off-diagonal terms representing the interaction between modes of adjacent radial orders. This formalism, expressed directly in the mixed-mode basis, provides analytical expressions for the near-degeneracy effects. We implemented the formalism within a global Bayesian mode-fitting framework for a direct fit of all ℓ = 0, 1, 2 modes in the power spectrum density. We were able to asymptotically model the asymmetric rotational splitting present in various radial orders of ℓ = 2 modes observed in young red giant stars without the need for any numerical stellar modelling. We applied our formalism to the Kepler target KIC 7341231, and it yielded core and envelope rotation rates consistent with previous numerical modelling while providing improved constraints from the global and model-independent approach. We also characterised the new target, KIC 8179973, measuring its rotation rate and mixed-mode parameters for the first time. As our framework relies on a direct global fit, it allows for much better precision on the asteroseismic parameters and rotation rate estimates than standard methods, yielding better constraints for rotation inversions. We have placed the first observational constraints on the asymptotic ℓ = 2 mixed-mode parameters (ΔΠ2, q2, and εg, 2), thus paving the way towards the use of asymptotic seismology beyond ℓ = 1 mixed modes."}],"oa_version":"Published Version","arxiv":1,"PlanS_conform":"1","publication_identifier":{"eissn":["1432-0746"],"issn":["0004-6361"]},"day":"01","acknowledgement":"We thank the referee for their careful and constructive report, which has substantially enhanced both the quality and clarity of the manuscript. L. Bugnet and L. Einramhof gratefully acknowledge support from the European Research Council (ERC) under the Horizon Europe programme (Calcifer; Starting Grant agreement N°101165631). While partially funded by the European Union, views and opinions expressed are, however, those of the authors only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. The authors acknowledge the great support and feedback provided during the redaction of this article by Pr. Rafael García and Pr. Savita Mathur. We would also like to thank Dr. Emily Hatt for her insights on uncertainty estimates. The authors also thank the members of the Asteroseismology and Stellar Dynamics group of the Institute of Science and Technology Austria (ISTA) for very useful discussions: L. Barrault, S.B. Das, K. Smith. This paper includes data collected by the Kepler mission and obtained from the MAST data archive at the Space Telescope Science Institute (STScI). Funding for the Kepler mission is provided by the NASA Science Mission Directorate. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–26555. Software: AstroPy (Astropy Collaboration 2013, 2018), Matplotlib (Hunter 2007), NumPy (Harris et al. 2020), SciPy (Virtanen et al. 2020), emcee (Foreman-Mackey et al. 2013), celerite (Foreman-Mackey et al. 2017), slepc4py (Dalcin et al. 2011; Hernandez et al. 2005), KADACS (García et al. 2011), sloscillations (Kuszlewicz et al. 2019, 2023).","scopus_import":"1","date_updated":"2026-07-08T06:39:05Z","file":[{"content_type":"application/pdf","date_updated":"2026-04-07T09:00:50Z","success":1,"file_id":"21664","file_size":12287607,"creator":"dernst","checksum":"560cac19dc70184626b85e71a26ee22e","access_level":"open_access","date_created":"2026-04-07T09:00:50Z","relation":"main_file","file_name":"2026_AstronomyAstrophysics_Liagre.pdf"}],"DOAJ_listed":"1","file_date_updated":"2026-04-07T09:00:50Z","_id":"21658","type":"journal_article","OA_place":"publisher","date_published":"2026-03-01T00:00:00Z","oa":1,"publication":"Astronomy & Astrophysics","article_number":"A321","publication_status":"published","citation":{"ieee":"B. R. B. Liagre, A. A. Desai, L. Einramhof, and L. A. Bugnet, “Near-degeneracy effects in quadrupolar mixed modes: From an asymptotic description to data fitting,” <i>Astronomy &#38; Astrophysics</i>, vol. 707. EDP Sciences, 2026.","apa":"Liagre, B. R. B., Desai, A. A., Einramhof, L., &#38; Bugnet, L. A. (2026). Near-degeneracy effects in quadrupolar mixed modes: From an asymptotic description to data fitting. <i>Astronomy &#38; Astrophysics</i>. EDP Sciences. <a href=\"https://doi.org/10.1051/0004-6361/202558023\">https://doi.org/10.1051/0004-6361/202558023</a>","ista":"Liagre BRB, Desai AA, Einramhof L, Bugnet LA. 2026. Near-degeneracy effects in quadrupolar mixed modes: From an asymptotic description to data fitting. Astronomy &#38; Astrophysics. 707, A321.","chicago":"Liagre, Bastien Raymond Bernard, Aayush A Desai, Lukas Einramhof, and Lisa Annabelle Bugnet. “Near-Degeneracy Effects in Quadrupolar Mixed Modes: From an Asymptotic Description to Data Fitting.” <i>Astronomy &#38; Astrophysics</i>. EDP Sciences, 2026. <a href=\"https://doi.org/10.1051/0004-6361/202558023\">https://doi.org/10.1051/0004-6361/202558023</a>.","mla":"Liagre, Bastien Raymond Bernard, et al. “Near-Degeneracy Effects in Quadrupolar Mixed Modes: From an Asymptotic Description to Data Fitting.” <i>Astronomy &#38; Astrophysics</i>, vol. 707, A321, EDP Sciences, 2026, doi:<a href=\"https://doi.org/10.1051/0004-6361/202558023\">10.1051/0004-6361/202558023</a>.","short":"B.R.B. Liagre, A.A. Desai, L. Einramhof, L.A. Bugnet, Astronomy &#38; Astrophysics 707 (2026).","ama":"Liagre BRB, Desai AA, Einramhof L, Bugnet LA. Near-degeneracy effects in quadrupolar mixed modes: From an asymptotic description to data fitting. <i>Astronomy &#38; Astrophysics</i>. 2026;707. doi:<a href=\"https://doi.org/10.1051/0004-6361/202558023\">10.1051/0004-6361/202558023</a>"},"corr_author":"1","intvolume":"       707","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1"}]