C*-simplicity and the amenable radical (GGT-Seminar)

  • Datum:

    20.10.2015

  • Referent:

    Adrien Le Boudec 

  • Zeit:

    16:00 Uhr

  • Abstract: 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. 
  • Ort:

    SR 1.067 (20.30)