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.

TEL 02-880-5857,6530,6531 / FAX 02-887-4694