[{"citation":{"mla":"Goncharov, Viacheslav. “An Easier Way to Compute 2-Cocycles Coming from a Reduction for Semidirect Products.” <i>Journal of Geometry and Physics</i>, vol. 227, 105878, Elsevier, 2026, doi:<a href=\"https://doi.org/10.1016/j.geomphys.2026.105878\">10.1016/j.geomphys.2026.105878</a>.","ama":"Goncharov V. An easier way to compute 2-cocycles coming from a reduction for semidirect products. <i>Journal of Geometry and Physics</i>. 2026;227. doi:<a href=\"https://doi.org/10.1016/j.geomphys.2026.105878\">10.1016/j.geomphys.2026.105878</a>","short":"V. Goncharov, Journal of Geometry and Physics 227 (2026).","chicago":"Goncharov, Viacheslav. “An Easier Way to Compute 2-Cocycles Coming from a Reduction for Semidirect Products.” <i>Journal of Geometry and Physics</i>. Elsevier, 2026. <a href=\"https://doi.org/10.1016/j.geomphys.2026.105878\">https://doi.org/10.1016/j.geomphys.2026.105878</a>.","ieee":"V. Goncharov, “An easier way to compute 2-cocycles coming from a reduction for semidirect products,” <i>Journal of Geometry and Physics</i>, vol. 227. Elsevier, 2026.","apa":"Goncharov, V. (2026). An easier way to compute 2-cocycles coming from a reduction for semidirect products. <i>Journal of Geometry and Physics</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.geomphys.2026.105878\">https://doi.org/10.1016/j.geomphys.2026.105878</a>","ista":"Goncharov V. 2026. An easier way to compute 2-cocycles coming from a reduction for semidirect products. Journal of Geometry and Physics. 227, 105878."},"main_file_link":[{"url":"https://doi.org/10.1016/j.geomphys.2026.105878","open_access":"1"}],"day":"21","external_id":{"arxiv":["2509.16169"]},"oa_version":"Published Version","has_accepted_license":"1","status":"public","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"For Hamiltonian actions of semidirect products G = FxH, we study 2-cocycles arising from residual Hamiltonian actions of F on Hamiltonian reductions for H. The motivation comes from the study of Teichmüller spaces for surfaces with boundary, which carry Hamiltonian actions of the Virasoro algebra. In this paper, we give a general setup for the problem, and we suggest an easier way to obtain the Gelfand-Fuchs 2-cocycles for Hamiltonian actions on Teichmüller spaces."}],"doi":"10.1016/j.geomphys.2026.105878","publication_identifier":{"eissn":["1879-1662"],"issn":["0393-0440"]},"volume":227,"ddc":["000"],"fulldoi":"https://doi.org/10.1016/j.geomphys.2026.105878","PlanS_conform":"1","intvolume":"       227","oa":1,"quality_controlled":"1","article_number":"105878","OA_place":"publisher","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"Elsevier","publication_status":"epub_ahead","OA_type":"hybrid","department":[{"_id":"GradSch"}],"scopus_import":"1","type":"journal_article","year":"2026","corr_author":"1","license":"https://creativecommons.org/licenses/by/4.0/","_id":"21981","publication":"Journal of Geometry and Physics","author":[{"id":"8a0e2993-7114-11f0-b60e-f50e633649d8","full_name":"Goncharov, Viacheslav","last_name":"Goncharov","first_name":"Viacheslav"}],"date_published":"2026-05-21T00:00:00Z","article_processing_charge":"Yes (via OA deal)","date_updated":"2026-06-16T09:23:39Z","month":"05","arxiv":1,"date_created":"2026-06-10T07:29:13Z","title":"An easier way to compute 2-cocycles coming from a reduction for semidirect products","article_type":"original"}]