Topics in geometric group theory.

This is a weekly EDMA course whose aim is to introduce the students to some contemporary aspects of geometric group theory. 
 
On September 23, the speaker is  Marc Troyanov, with title   The geometry of finitely generated groups and quasi-isometry invariants.

Abstract:  In this first lecture we will introduce some of the main ideas of geometric group theory, in particular the word metric the Cayley graph and the notion of qausi-isometry. We will give some examples of quasi-isomery invariants and prove the so called Milnor-Svarc Lemma.