Seminar June 29th

Monday, June 29th, 13:00, CRM Small Room

Speaker: Martin Kassabov, Cornell University

Title: Subspace arrangements and property T

Abstract: I will mainly talk about (my viewpoint at) a method for proving property T started by Dymara and Januszkiewicz. Their original motivation came from groups action on dimensional building, but the refined idea does not used anything more angles between subspaces in an finite dimensional Euclidean space. Parts of the talk are based on a work of M. Ershov and A. Jaikin.

Seminar June 3rd

We will have a double session of the seminar at the same time as the Hyperbolic Groups course:


Wednesday June 3rd, Room 005, FME, Campus Sud UPC


First Talk, 11:00

Speaker: José Manuel Higes López, Universidad Complutense de Madrid

Title: The coarse classification of countable abelian groups

Abstract: We will show the classification of countable abelian groups up to coarse equivalence. As an application we will use this result to detect which groups are coarsely equivalent to countable abelian groups. Joint with T. Banakh, I. Zarichnyi.



Second talk, 12:00

Speaker: Lars Louder, University of Michigan

Title: Graphs of subgroups of free groups

Abstract: We will develop, using Stallings' folding, graphs of groups, and a process called "blowing up," a simple topological model for representing graphs of subgroups of free groups. Applications to be discussed include simple proofs of some old results of combinatorial group theory. Generalizations of the technique and of these seemingly simple ideas to limit groups are important in the dimension theory for algebraic varieties defined over the free group.

Course on Hyperbolic Groups, June 2nd to 4th

As an event for the graduate class "Seminar on Group Theory", there will be a three-day minicourse.

Tuesday June 2nd to Thursday June 4th, 15.00 to 18:00, Room 005, FME, UPC Campus Sud

Speaker: Oleg Bogopolski, Universität Düsseldorf

Title: Hyperbolic groups