Equivalent notions of rank for manifolds of non-positive curvature and for mapping class groups of surfaces

Equivalent notions of rank for manifolds of non-positive curvature and for mapping class groups of surfaces

Mon, 21/05/2012
15:45 		Cornelia Drutu (Oxford) Topology Seminar Add to calendar L3
Equivalent notions of rank for manifolds of non-positive curvature and for mapping class groups of surfaces
In Riemannian geometry there are several notions of rank defined for non-positively curved manifolds and with natural extensions for groups acting on non-positively curved spaces. The talk shall explain how various notions of rank behave for mapping class groups of surfaces. This is joint work with J. Behrstock.