Stefan Witzel
Stefan Witzel

I'm a postdoc at the Faculty of Mathematics of Bielefeld University where I obtained my habilitation in 2017. Before I was a postdoc in Münster. I did my PhD in Darmstadt.

My research interests fall into the area of geometric group theory, that is, I study groups using geometric and topological tools. Many of the groups I am interested in act on Bruhat-Tits buildings; this is the case for example for S-arithmetic groups. Another class of groups I have become interested in are relatives of Thompson's groups F, T and V. A common feature is that these groups act on CAT(0) spaces, although not cocompactly. I am particularly interested in finiteness properties of groups, which means that I try to find highly connected, cocompact spaces for the groups to act on.

My student Eduard Schesler works on Sigma-invariants of S-arithmetic subgroups of Borel groups.

I am funded through the DFG via the project WI 4079/2 and am member of the SPP 2026.

Together with Dawid Kielak and Kai-Uwe Bux I am organizing the conference Topological and Homological Methods in Group Theory 2018, successor to the conference Topological and Homological Methods in Group Theory from 2016.

Address

Faculty of Mathematics
Bielefeld University
Universitätsstraße 25
D-33615 Bielefeld

Mail Address

Faculty of Mathematics
Bielefeld University
Postfach 100131
D-33501 Bielefeld

Office: V4-204
Phone: +49 (521) 106 4986
Fax: +49 (521) 106 6480
Email: switzel [at] math.uni-bielefeld.de

Last modified: Mon 15 Jan 2018, 14:13