Operator Theory Seminar

Krishendu Khan
Fundamental group and Cartan rigidity for von Neumann algebras arising from Rips construction.


The fundamental group is an important invariant of finite factors introduced by Murray and von Neumann. Calculation of fundamental group is in general a very difficult and challenging problem. The first examples of property (T) factors with trivial fundamental group were constructed in a joint work with Ionut Chifan and Sayan Das. In this talk I shall talk about some recent development about calculation of fundamental groups of some finite factors based on an ongoing work with Sayan Das. If time permits, I shall talk about Cartan rigidity of products of some relatively hyperbolic groups and groups arising from Rips constructions.

Event Date: 
December 7, 2021 - 1:30pm to 3:30pm
VAN 309 or Online (See URL)
Calendar Category: 
Seminar Category: 
Operator Theory