Place:

This talk will take place in the blue seminar room, back building, Žitná 25.

It will also be broadcast on Zoom:

https://cesnet.zoom.us/j/91975183920?pwd=SGdlRUhLS21HUnVFTXBKcE1vYXlrQT09

Meeting ID: 919 7518 3920

Passcode: 102707

Abstract:

Recently there has been a lot of research on C*-inclusions with the property that every intermediate C*-algebra is simple. Last year, Mikael Rørdam initiated a systematic study of such inclusions, which he called C*-irreducible. I will use this notion as an excuse to present some of the results of my recent work with Ralph Meyer. I will discuss the relationship between C*-irreducibility, aperiodicity, the almost extension property and noncommutative Cartan inclusions in the sense of Ruy Exel. This leads to a characterisation of regular C*-irreducible inclusions by a long list of equivalent conditions, one being that the inclusion comes from an outer Fell bundle over a discrete group.