Two approaches towards property (T) for groups acting on simplicial complexes

preprint2012arXivOpen access

Abstract

This article generalizes two approaches for property (T) - the first is a generalization of Zuk's criterion for property (T) and the second is a generalization of the work of Kassabov regarding property (T) and subspace arrangements. In both cases we obtain new criteria for property (T) (and for vanishing of higher L2-cohomologies).

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