Which random groups are cubulated
Presenter
September 30, 2016
Keywords:
- Kazhdan's property T
- geometric group theory
- expander graph
- representation theory and algebraic geometry
- CAT(0) space
- Riemannian geometry
- discrete isoperimetric inequality
MSC:
- 57M60
- 57-xx
- 58-xx
- 58Dxx
- 58D05
- 58D19
- 20F65
- 20F67
- 20F70
- 20F40
- 20F55
- 20Fxx
- 20-xx
Abstract
In Gromov's density model for random groups at low densities groups can be cubulated (Ollivier-Wise) whereas at higher densities the groups have Property (T) (Zuk, Kotowski-Kotowski), but there's a gap where things are unclear. I'll discuss two results, with Piotr Przytycki and Cornelia Drutu respectively, about this problem.