CRC Colloquium:
Prof. Dr. Wilhelm Winter (WWU Münster): Approximation properties and rigidity questions for C*-algebras
Prof. Dr. David Kerr (WWU Münster): The dynamics of comparison

The talks will take place as hybrid event.

Thursday, 03.02.2022 16:00 per ZOOM: Link to Zoom info

Mathematik und Informatik

1st talk:
I give an introduction to approximation properties for nuclear C*-algebras, discuss how they are related to amenability, and describe how finite dimensional approximations lead to intriguing rigidity questions. I will use C*-algebras associated with topological dynamical systems as guiding examples.

2nd talk:
The notion of comparison traces its roots back to the Hausdorff and Banach-Tarski paradoxes and has long layed a fundamental role in both ergodic theory and operator algebras. Its importance is often overshadowed however by related but more refined structural properties such as tileability and finite-dimensional approximation. In this talk I will highlight two instances in dynamics where the teasing out of finer structure hinges around comparison, one of a quantitative nature with connections to entropy theory and the other of a topological nature with connections to C*-algebras.

Angelegt am Monday, 31.01.2022 07:42 von boeckena
Geändert am Monday, 31.01.2022 07:43 von boeckena
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