Operator algebra seminar

Speaker: Christian Voigt, Glasgow

Title: The structure of quantum permutation groups 

Abstract: Quantum permutation groups, introduced by Wang, are a quantum analogue of permutation groups. These quantum groups have a surprisingly rich structure, and they appear naturally in a variety of contexts, including combinatorics, operator algebras, and free probability. In this talk I will give an introduction to these quantum groups, starting with some background and basic definitions. I will then present a computation of the K-groups of the C*-algebras associated with quantum permutation groups, 
relying on methods from the Baum-Connes conjecture.