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„The median class and superrigidity of actions on CAT(0) cube complexes “
Alessandra Iozzi, ETH Zurich
Let G be a group acting by automorphisms on a finite dimensional CAT(0) cube complex. We define the median class of the action in the second bounded cohomology of G with geometrically defined coefficients and prove that it does not vanish if the action is not elementary. We apply this result to establish a superrigidity result.
Dienstag, den 18. Dezember 2012 um 11:00 Uhr, in INF 288, HS 5 Dienstag, den 18. Dezember 2012 at 11:00, in INF 288, HS 5
Der Vortrag folgt der Einladung von The lecture takes place at invitation by Anna Wienhard