{"title":"相干捆的陈氏电流","authors":"Richard Larkang, Elizabeth Wulcan","doi":"10.46298/epiga.2022.8653","DOIUrl":null,"url":null,"abstract":"Given a finite locally free resolution of a coherent analytic sheaf $\\mathcal\nF$, equipped with Hermitian metrics and connections, we construct an explicit\ncurrent, obtained as the limit of certain smooth Chern forms of $\\mathcal F$,\nthat represents the Chern class of $\\mathcal F$ and has support on the support\nof $\\mathcal F$. If the connections are $(1,0)$-connections and $\\mathcal F$\nhas pure dimension, then the first nontrivial component of this Chern current\ncoincides with (a constant times) the fundamental cycle of $\\mathcal F$. The\nproof of this goes through a generalized Poincar\\'e-Lelong formula, previously\nobtained by the authors, and a result that relates the Chern current to the\nresidue current associated with the locally free resolution.","PeriodicalId":41470,"journal":{"name":"Epijournal de Geometrie Algebrique","volume":"1 1","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Chern currents of coherent sheaves\",\"authors\":\"Richard Larkang, Elizabeth Wulcan\",\"doi\":\"10.46298/epiga.2022.8653\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Given a finite locally free resolution of a coherent analytic sheaf $\\\\mathcal\\nF$, equipped with Hermitian metrics and connections, we construct an explicit\\ncurrent, obtained as the limit of certain smooth Chern forms of $\\\\mathcal F$,\\nthat represents the Chern class of $\\\\mathcal F$ and has support on the support\\nof $\\\\mathcal F$. If the connections are $(1,0)$-connections and $\\\\mathcal F$\\nhas pure dimension, then the first nontrivial component of this Chern current\\ncoincides with (a constant times) the fundamental cycle of $\\\\mathcal F$. The\\nproof of this goes through a generalized Poincar\\\\'e-Lelong formula, previously\\nobtained by the authors, and a result that relates the Chern current to the\\nresidue current associated with the locally free resolution.\",\"PeriodicalId\":41470,\"journal\":{\"name\":\"Epijournal de Geometrie Algebrique\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2021-05-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Epijournal de Geometrie Algebrique\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.46298/epiga.2022.8653\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Epijournal de Geometrie Algebrique","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.46298/epiga.2022.8653","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
Given a finite locally free resolution of a coherent analytic sheaf $\mathcal
F$, equipped with Hermitian metrics and connections, we construct an explicit
current, obtained as the limit of certain smooth Chern forms of $\mathcal F$,
that represents the Chern class of $\mathcal F$ and has support on the support
of $\mathcal F$. If the connections are $(1,0)$-connections and $\mathcal F$
has pure dimension, then the first nontrivial component of this Chern current
coincides with (a constant times) the fundamental cycle of $\mathcal F$. The
proof of this goes through a generalized Poincar\'e-Lelong formula, previously
obtained by the authors, and a result that relates the Chern current to the
residue current associated with the locally free resolution.