Seminar on Discrete Mathematics: Permutation module decomposition of the cohomology of a regular semisimple Hessenberg variety

报告人：Soojin Cho（韩国亚洲大学）

时  间：2026年5月27日14:00

地  点：Zoom会议: 714-1526-6102（密码：260527）& 实验楼S105

内容摘要:

We consider the module structure of the cohomology of regular semisimple Hessenberg varieties (of type A) under the symmetric group action. We use BB(Bialynicki-Birula) basis of the cohomology space to construct permutation module decomposition of the cohomology for the Hessenberg varieties associated with lollipop graphs and the second degree cohomology for general cases. This talk is based on the works done with Jaehyun Hong and Eunjeong Lee, and with JiSun Huh and Seonjeong Park.

个人简介：

Soojin Cho，韩国亚洲大学数学学院教授，主要研究领域是代数组合学。1995年在美国Minnesota大学获得博士学位，目前已经在众多数学权威期刊上《Adv. Math.》，《Combinatorica》，《Int. Math. Res. Not.》，《J. Comb. Theory Ser. A》,《Trans. Am. Math. Soc》发表多篇文章。

联系人：靳宇