中文

循环覆盖:Hodge理论与范畴Torelli定理

代数几何 2023-12-11 v2

摘要

YY的导出范畴具有矩形Lefschetz分解,并考虑在除子ZZ上分歧的循环覆盖XYX\to Y。在Kuznetsov与Perry未考虑的情形下,我们定义XX的等变导出范畴的一个子范畴AZ\mathcal{A}_Z,它包含而非被包含于Db(Z)\mathrm{D}^{\mathrm{b}}(Z)。我们随后证明XX的Kuznetsov分支的等变范畴分解为AZ\mathcal{A}_Z的若干拷贝。作为一个应用,我们在某些数值假设下将AZ\mathcal{A}_ZZZ的上同调联系起来。特别地,我们获得了指标为1和2的最低次素Fano三维簇的范畴Torelli定理。

关键词

引用

@article{arxiv.2310.13651,
  title  = {Cyclic covers: Hodge theory and categorical Torelli theorems},
  author = {Hannah Dell and Augustinas Jacovskis and Franco Rota},
  journal= {arXiv preprint arXiv:2310.13651},
  year   = {2023}
}

备注

19 pages. Added a categorical Torelli theorem for prime Fano threefolds of index 2 and degree 1. Slightly weakened the generality assumptions. Other minor changes. Comments welcome!