Classification of crossed product C*-algebras arising from essentially free actions.

Kang Li  (Friedrich-Alexander-Universitat Erlangen-Nürnberg, Germany)

9:00-10:00，April 15，2024    WenfuBuilding 301

Abstract:

Essentially free actions play an important role in ergodic theory and group measure space II1-factors. In this talk, I will explain why (uniform) essential freeness is a better prerequisite than topological freeness in the classification of crossed product C*-algebras, and provide a first general result on uniform property Γ and Z-stability, assuming only topological freeness, in this direction. This is a joint work with Xin Ma.

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