Kolloquium
des SFBs 1442 Geometrie: Deformationen und Rigidität
am Donnerstag, 26. Januar 2023
um 16:15 Uhr
im Hörsaal M2
Simplicity of automorphism groups of homogeneous structures
Sprecher: Katrin Tent
We discuss some general criteria that can be used to show that the automorphism group of a homogeneous structure (such as metric space, right-angled building, graph or hypergraphs) are simple groups or have simple quotients.
Compact connected one-dimensional spaces
Sprecher: Aleksandra Kwiatkowska
Using a dualization of the Fraisse limit construction from model theory, we show how to construct various (well known as well as new ones) projectively homogeneous compact connected one-dimensional metric spaces. Furthermore, instead of automorphism groups of homogeneous structures, we are interested in homeomorphism groups of projectively homogeneous spaces. I will present recent results on this topic.