Work group Operator algebras and non-commutative geometry

Our work group represents the fields of operator algebras and noncommutative geometry in teaching and research. The current focus of our research is

  • structure of C * algebras and more general non-commutative algebras, in particular their K-theory and cyclic homology, as well as cohomology, group C * algebras
  • representation theory of locally compact groups and the Baum-Connes conjecture
  • non-commutative dynamic systems such as crossed products and ring C * algebras
  • quantized spaces
  • quantum groups and quantum groupoids


We meet every Monday 14 - 16 in SRZ 216 for kleines seminar that is addressed mainly to MSc and PhD students, and to PostDocs.

 

During the lecture period, we meet for talks at Oberseminar C* algebras every Tuesday at 15:45 with coffee, cake and time for discussions in the seminar room SRZ 216 (Orléans-Ring 12).

 

 

Oberseminar C*-Algebras

 

 
Date Name Title Info
08.04.25 --- ---  
15.04.25 Philipp Sibbel C*-diagonals with Cantor spectrum in Cuntz algebras.  
22.04.25 Sam Shepherd Product separability for special cube complexes.  
29.04.25 Milan Donvil (KU Leuven) W*-superrigidity for cocycle twisted group von Neumann algebras.  
06.05.25 Keivan Mallahi Karei (Constructor University Bremen) Random free semigroups of affine transformations. change of room: M4
13.05.25 Dietmar Bisch (Vanderbilt University) Degrees of Noncommutativity for Subfactors. change of room: M4
20.05.25 Astrid an Huef (Victoria University of Wellington) Nuclear dimension of C*-algebras of groupoids, with applications to C*-algebras of directed graphs.  
27.05.25 Christos Kitsios (Göttingen) tba.  
03.06.25 Alistair Miller (SDU) Homology and K-theory for self-similar group actions.  
10.06.25 --- --- (Pfingstferien/ Pentecost holidays)
17.06.25 Soham Chakraborty (ENS Paris) tba. change of room: M4
24.06.25 Eduard Vilalta (Chalmers) tba.  
01.07.25     Belfast Conference
08.07.25 Spyros Petrakos tba.