中文

余维二 Cohen-Macaulay 理想的符号幂

交换代数 2020-05-12 v3

摘要

IXI_X 为定义余维二算术 Cohen-Macaulay 概型 XPnX \subseteq \mathbb{P}^n 的饱和齐次理想,并设 IX(m)I_X^{(m)} 表示其第 mm 次符号幂。我们关注何时 IX(m)=IXmI_X^{(m)} = I_X^m。我们综述了当 XX 局部为完全交时关于此问题的已知结果,并特别回顾了何时对所有 m1m \geq 1IX(m)=IXmI_X^{(m)} = I_X^m 的分类。然后我们讨论了如何弱化这些假设,但仍能获得符号幂与普通幂之间的等式。最后,我们证明此分类允许我们:(1) 简化关于 P1×P1\mathbb{P}^1 \times \mathbb{P}^1 中点理想符号幂的已知结果;(2) 验证 Guardo、Harbourne 和 Van Tuyl 的一个猜想;(3) 为 R"omer 的一个猜想提供额外证据。

关键词

引用

@article{arxiv.1606.00935,
  title  = {Symbolic powers of codimension two Cohen-Macaulay ideals},
  author = {Susan Cooper and Giuliana Fatabbi and Elena Guardo and Anna Lorenzini and Juan Migliore and Uwe Nagel and Alexandra Seceleanu and Justyna Szpond and Adam Van Tuyl},
  journal= {arXiv preprint arXiv:1606.00935},
  year   = {2020}
}

备注

This project was started at the Mathematisches Forschungsinstitut Oberwolfach (MFO) as part of the mini-workshop "Ideals of Linear Subspaces, Their Symbolic Powers and Waring Problems" held in February 2015. Final version of paper; to appear in Communications in Algebra