Traces on ultrapower C*-algebras

Francesc Perera (Universitat Autònoma de Barcelona)

09-Jun-2021, 19:00-20:00 (3 years ago)

Abstract: Every sequence of traces on a C*-algebra induces a limit trace on a free ultrapower. I will discuss the natural question of characterizing when this set of limit traces is dense, and mention the use of techniques coming from the theory of Cuntz semigroups to obtain such a characterization. This talk is based on joint work with Ramon Antoine, Leonel Robert, and Hannes Thiel.

geometric topologynumber theoryoperator algebrasrepresentation theory

Audience: researchers in the topic

( slides | video )


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