Topological freeness of various boundary actions arising in geometric topology and applications to C*-algebras
报告人：马昕
报告地点：人民大街校区数学与统计学院104室
报告时间：2025年11月23日星期日13:30-14:30
邀请人：李春光 安庆楠
报告摘要：
In this talk, I will demonstrate topological freeness of the actions on the visual boundary of a proper CAT(0) space and on the Roller boundary of a proper CAT(0) cube complex by a group with a rank-one element. Then I will show their applications to C*-algebras such as C*- selfless of groups and regularity properties, such as pure infiniteness, of crossed product C*-algebras. This is based on a joint work with Daxun Wang and Wenyuan Yang.
主讲人简介：
马昕，2019年毕业于美国得克萨斯农工大学。现任哈尔滨工业大学数学研究院教授。主要研究方向为算子代数、群论、动力系统交叉。在TAMS、IMRN、JLMS、JFA、ETDS、PAMS发表文章若干。
学校主页