Virtually free groups are Hilbert-Schmidt stable

  • Datum:

    06.05.22

  • Referent:

    Maria Gerasimova

  • Zeit:

    11:30

  • Abstract:

    We will discuss the notion of Hilbert-Schmidt stability of groups, its connection to C*-algebras, and examples of stable and non-stable groups. After this we will present a new class of Hilbert-Schmidt stable groups, more precisely we will prove that virtually free groups are Hilbert-Schmidt stable. This proof is quite elementary and uses only the tools from geometric group theory.