**Speaker**: Tullio Ceccherini-Silberstein, Universita' del Sannio

**Date**: Fri, Sep 22, 2017

**Time**: 16:00 - 17:30

**Venue**: Middle Meeting Room

**Title**: Gromov's Theorem: Asymptotic cones and the proof of the theorem

**Abstract**:

We discuss ultrafilters, ultrapowers, and asymptotic cones. Then we recall the notion of Hausdorff dimension, Tits' alternative theorem, the Montgomery-Zippin theorem. We complete with a detail account of all steps of the proof of the theorem.