Type semigroups and groupoid C*-algebras

Bartosz Kwasniewski (University of Bialystok)

Thursday 23rd July 16:00-17:00
Maths 311B

Abstract

Tarski developed the theory of type semigroups for group actions as a tool for studying phenomena such as the Banach-Tarski paradox. We will discuss how to generalize this theory to etale groupoids. This leads to a dynamical version of dichotomy theorem known for classifiable simple C*-algebras -- they are either stably finite or purely infinite. (based on a joint work with Ralf Meyer and Akshara Prasad)

Add to your calendar

Download event information as iCalendar file (only this event)