Title: Graph covers with two new eigenvaluesSpeaker: Olha Silina Affiliation: University of Waterloo Room: MC 5479
I am going to talk about graph covers. If $Y$ is a cyclic cover of $X$, it turns out that $Y$ has the same spectrum as $X$ plus (possibly) some new eigenvalues.
Title: OutFn, M_gn and renormalized topological field theorySpeaker: Michael Borinsky Affiliation: Nikhef Room: MC 5417
I will report on recent joint work with Karen Vogtmann on the Euler characteristic of Out(F_n) and the moduli space of graphs.