Index Theory on Mapping Tori
发布时间：2021年10月11日
浏览次数：3854
发布者: He Liu
主讲人： Valerio Proietti (East China Normal University)
活动时间： 从 2021-10-12 14:00 到 15:00
场地： 北京国际数学研究中心，全斋全29教室
We consider two different discrete group actions on a compact space. In algebraic topology, the associated homotopy quotient is a good model for the orbit space. In noncommutative geometry, the crossed product is another such model. Do isomorphic homotopy quotients lead to isomorphic crossed product algebras? We'll give a partial answer to this question, and explain a geometric interpretation of the so-called Elliott invariant along the way.
