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Equivalent notions of rank for the mapping class groups


Speaker: Cornelia Drutu, University of Oxford/MSRI
Location: 2112 MSB
Start time: Tue, Nov 29 2011, 3:10PM

Several notions of rank, initially defined in the setting of manifolds of non-positive curvature, have been extended later to finitely generated groups. This talk is on the equality of three types of rank (de fined using isoperimetric inequalities, divergence functions and respectively the maximal dimension of a quasi-flat) for mapping class groups. This is joint work with Jason Behrstock.