{"article_processing_charge":"No","intvolume":"        24","has_accepted_license":"1","external_id":{"arxiv":["1809.08970"],"isi":["000517806400019"]},"day":"20","scopus_import":"1","oa":1,"quality_controlled":"1","type":"journal_article","date_created":"2020-02-02T23:01:06Z","author":[{"first_name":"Tanya K","id":"4D046628-F248-11E8-B48F-1D18A9856A87","full_name":"Srivastava, Tanya K","last_name":"Srivastava"}],"date_updated":"2023-10-17T07:42:21Z","publication_identifier":{"issn":["1431-0635"],"eissn":["1431-0643"]},"date_published":"2019-05-20T00:00:00Z","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png"},"file":[{"date_created":"2020-02-03T06:26:12Z","date_updated":"2020-07-14T12:47:58Z","creator":"dernst","file_id":"7438","relation":"main_file","file_name":"2019_DocumMath_Srivastava.pdf","file_size":469730,"checksum":"9a1a64bd49ab03fa4f738fb250fc4f90","content_type":"application/pdf","access_level":"open_access"}],"file_date_updated":"2020-07-14T12:47:58Z","ddc":["510"],"volume":24,"language":[{"iso":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","page":"1135-1177","publisher":"EMS Press","publication_status":"published","citation":{"ama":"Srivastava TK. On derived equivalences of k3 surfaces in positive characteristic. <i>Documenta Mathematica</i>. 2019;24:1135-1177. doi:<a href=\"https://doi.org/10.25537/dm.2019v24.1135-1177\">10.25537/dm.2019v24.1135-1177</a>","apa":"Srivastava, T. K. (2019). On derived equivalences of k3 surfaces in positive characteristic. <i>Documenta Mathematica</i>. EMS Press. <a href=\"https://doi.org/10.25537/dm.2019v24.1135-1177\">https://doi.org/10.25537/dm.2019v24.1135-1177</a>","ista":"Srivastava TK. 2019. On derived equivalences of k3 surfaces in positive characteristic. Documenta Mathematica. 24, 1135–1177.","ieee":"T. K. Srivastava, “On derived equivalences of k3 surfaces in positive characteristic,” <i>Documenta Mathematica</i>, vol. 24. EMS Press, pp. 1135–1177, 2019.","mla":"Srivastava, Tanya K. “On Derived Equivalences of K3 Surfaces in Positive Characteristic.” <i>Documenta Mathematica</i>, vol. 24, EMS Press, 2019, pp. 1135–77, doi:<a href=\"https://doi.org/10.25537/dm.2019v24.1135-1177\">10.25537/dm.2019v24.1135-1177</a>.","short":"T.K. Srivastava, Documenta Mathematica 24 (2019) 1135–1177.","chicago":"Srivastava, Tanya K. “On Derived Equivalences of K3 Surfaces in Positive Characteristic.” <i>Documenta Mathematica</i>. EMS Press, 2019. <a href=\"https://doi.org/10.25537/dm.2019v24.1135-1177\">https://doi.org/10.25537/dm.2019v24.1135-1177</a>."},"status":"public","publication":"Documenta Mathematica","department":[{"_id":"TaHa"}],"oa_version":"Published Version","doi":"10.25537/dm.2019v24.1135-1177","month":"05","article_type":"original","isi":1,"title":"On derived equivalences of k3 surfaces in positive characteristic","year":"2019","abstract":[{"text":"For an ordinary K3 surface over an algebraically closed field of positive characteristic we show that every automorphism lifts to characteristic zero. Moreover, we show that the Fourier-Mukai partners of an ordinary K3 surface are in one-to-one correspondence with the Fourier-Mukai partners of the geometric generic fiber of its canonical lift. We also prove that the explicit counting formula for Fourier-Mukai partners of the K3 surfaces with Picard rank two and with discriminant equal to minus of a prime number, in terms of the class number of the prime, holds over a field of positive characteristic as well. We show that the image of the derived autoequivalence group of a K3 surface of finite height in the group of isometries of its crystalline cohomology has index at least two. Moreover, we provide a conditional upper bound on the kernel of this natural cohomological descent map. Further, we give an extended remark in the appendix on the possibility of an F-crystal structure on the crystalline cohomology of a K3 surface over an algebraically closed field of positive characteristic and show that the naive F-crystal structure fails in being compatible with inner product. ","lang":"eng"}],"_id":"7436"}