报告题目 (Title)：On unitriangular decomposition matrices（关于单位三角分解矩阵）
报告人 (Speaker)： 冯致程 副研究员（南方科技大学）
报告时间 (Time)：2023年9月27日(周三) 9:00
报告地点 (Place)：腾讯会议：116851262
邀请人(Inviter)：孟沆洋
报告摘要：Irreducible representations of finite groups over fields of positive characteristic, or equivalently irreducible Brauer characters, make a quite difficult subject. Most of the problems and results can be studied via the decomposition matrix relating the set of irreducible Brauer characters in characteristic to the better understood set of ordinary characters. Many decomposition matrices of finite groups enjoy the property of so-called unitriangularity. We will talk about the unitriangular basic sets, especially for finite reductive groups in non-defining characteristic, as well as some applications. This is a joint work with Britta Späth.