PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Stephanie Zerby.

Title:$\ell^2$-Betti Numbers, Costs of Group Actions, and Random Trees
Seminar:Job Candidate Talk
Speaker:Russell Lyons
Abstract:
Abstract: Two important invariants of groups and their measure-preserving actions are $\ell^2$-Betti numbers and cost. Several basic questions about these invariants remain open. We discuss a possible approach to some of these questions that uses random trees. This is joint work with Damien Gaboriau. No background will be assumed.

Room Reservation Information

Room Number:MB114
Date:10 / 24 / 2013
Time:09:30am - 10:30am