| Date | Sep 18, 2015 | 
|---|---|
| Speaker | Damian Osajda | 
| Dept. | Uniwersytet Wroclawski, Poland | 
| Room | 129-104 | 
| Time | 11:00-12:30 | 
I will present my recent construction of finitely generated groups containing isometrically embedded expanders. Such groups have many exotic properties: they do not embed coarsely into Hilbert space, the Baum-Connes conjecture with coefficients fails for them. 
The construction allows to provide the first examples of groups that have no property A (are not exact) but still are coarsely embeddable into a Hilbert space. Even more: they act properly on CAT(0) cubical complexes. I will present some further applications of the main construction.