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Relative rigidity, quasiconvexity and C-complexes

By Mahan Mj

Abstract

Abstract. We introduce and study the notion of relative rigidity for pairs (X,J) where 1) X is a hyperbolic metric space andJ a collection of quasiconvex sets 2) X is a relatively hyperbolic group andJ the collection of parabolics 3) X is a higher rank symmetric space and J an equivariant collection of maximal flats Relative rigidity can roughly be described as upgrading a uniformly proper map between two suchJ ’s to a quasi-isometry between the corresponding X’s. A related notion is that of a C-complex which is the adaptation of a Tits complex to this context. We prove the relative rigidity of the collection of pairs (X,J) as above. This generalises a result of Schwarz for symmetric patterns of geodesics in hyperbolic space. We show that a uniformly proper map induces an isomorphism of the corresponding C-complexes. We also give a couple of characterization

Year: 2013
OAI identifier: oai:CiteSeerX.psu:10.1.1.313.1862
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