相干捆的陈氏电流

Pub Date : 2021-05-31 DOI:10.46298/epiga.2022.8653
Richard Larkang, Elizabeth Wulcan
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引用次数: 1

摘要

给定具有厄米度量和连接的相干解析层$\mathcalF$的有限局部自由分辨率,我们构造了一个显式电流,作为$\mathcalF$的某些光滑陈恩形式的极限,它表示$\mathcalF$的陈恩类,并且在$\mathcalF$的支持上得到支持。如果连接为$(1,0)$-connections,并且$\mathcal F$具有纯维数,则该chen电流的第一个非平凡分量与$\mathcal F$的基本周期重合(常数乘以)。这是通过作者先前得到的一个广义庞加莱隆公式来证明的,以及一个将陈恩电流与与局部自由分辨率相关的剩余电流联系起来的结果。
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Chern currents of coherent sheaves
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.
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