活动地点：CMS 201

活动类型：学术报告

主讲人：韩飞教授

活动时间：2019-04-19 10:30:00--2019-04-19 11:30:00

活动内容：

韩飞教授专题学术报告

 

 

报告题目：Modular invariants for proper actions

报告人：韩飞  教授（新加坡国立大学）

 

时间：2019年4月19日（周五）上午10:30

 

地点：数学中心201教室 

Abstract: Witten genus and elliptic genera are modular topological invariants for manifolds, which are closely related to representation of loop groups and the hypothetical index theory on free loop space as well as the elliptic cohomology theory in algebraic topology. They find applications in problems of positive curvature and group actions on manifolds. In this talk, we will briefly introduce these invariants and present our joint work with Varghese Mathai on generalizing them to open manifolds with proper actions of open groups.