Home | deutsch  |  Impressum  |  Data Protection  |  Sitemap  |  Intranet  |  KIT
Department of Mathematics

Karlsruhe Institute of Technology
D-76128 Karlsruhe
Tel.: +49 721 608-43800

C*-simplicity and the amenable radical

Speaker: Adrien Le Boudec
Place: SR 1.067 (20.30)
Time: 20.10.2015, 16:00 - 17:00
Invited by: Prof. Dr. Roman Sauer


A countable group is C*-simple if its reduced C*-algebra is simple. We will first survey recent results of Kalentar-Kennedy and Breuillard-Kalentar-Kennedy-Ozawa about the connection between the C*-simplicity of a countable group and its boundary actions. We will then explain the construction of non-C*-simple groups with no amenable normal subgroup. Some examples arising from this construction are moreover finitely generated and simple.

Tea at 15:30 h in room 1.062 (20.30).