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Fakultät für Mathematik

Karlsruher Institut für Technologie
D-76128 Karlsruhe
Tel.: +49 721 608-43800

C*-simplicity and the amenable radical

Referent: Adrien Le Boudec
Ort: SR 1.067 (20.30)
Termin: 20.10.2015, 16:00 - 17:00 Uhr
Gastgeber: 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.

Ab 15:30 Uhr findet in Raum 1.062 im Kollegiengebäude Mathematik (Geb. 20.30) ein gemeinsamer Tee statt. Herzliche Einladung!