中文

具有缺陷的节点簇的最大族

代数几何 2024-10-21 v4

摘要

本文证明了 P4P^4 中具有缺陷的节点超曲面至少有 (d1)2(d-1)^2 个节点,且若其节点数不超过 2(d2)(d1)2(d-2)(d-1)d>6d>6,则它包含一个平面或二次曲面。此外,我们证明了沿 2d2d 次曲面分支且具有缺陷的 P3P^3 节点二重覆盖至少有 d(2d1)d(2d-1) 个节点。对于充分大的 dd,我们构造了 P2n+2P^{2n+2} 中具有缺陷的 dd 次节点超曲面的最大维数族。

关键词

引用

@article{arxiv.1310.0227,
  title  = {Maximal families of nodal varieties with defect},
  author = {Remke Kloosterman},
  journal= {arXiv preprint arXiv:1310.0227},
  year   = {2024}
}

备注

v2: A proof for the Ciliberto-Di Gennaro conjecture is added (Section 5); Some minor corrections in the other sections. v3: some minor corrections in the abstract v4: The proof for the Ciliberto-Di Gennaro conjecture has been modified; The paper is split into two parts, the complete intersection case will be discussed in a different paper