中文

关于无平方单项式理想的Hilbert深度的注记

交换代数 2024-04-29 v5

摘要

KK为无限域,S=K[x1,,xn]S=K[x_1,\ldots,x_n],且0IJS0\subset I\subsetneq J\subset S为两个无平方单项式理想。在先前论文中我们证明了J/IJ/I的Hilbert深度的新公式。本文中,我们阐明如何利用(相对)单纯复形与(商)无平方单项式理想之间的Stanley-Reisner对应,以重新得到Hilbert深度的一些基本性质。更确切地说,我们证明depth(J/I)hdepth(J/I)dim(J/I)\operatorname{depth}(J/I)\leq \operatorname{hdepth}(J/I)\leq \dim(J/I)。同时,我们证明若S/IS/I是Cohen-Macaulay的,则hdepth(I)hdepth(S/I)+1\operatorname{hdepth}(I)\geq \operatorname{hdepth}(S/I)+1

关键词

引用

@article{arxiv.2310.12339,
  title  = {Remarks on the Hilbert depth of squarefree monomial ideals},
  author = {Silviu Balanescu and Mircea Cimpoeas},
  journal= {arXiv preprint arXiv:2310.12339},
  year   = {2024}
}

备注

10 pages; major changes (we realized that our results hold only in the squarefree case and we modified accordingly); one coauthor added