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The infinitesimal projective rigidity under Dehn filling

By Michael Heusener and Joan Porti

Abstract

To a hyperbolic manifold one can associate a canonical projective structure and ask whether it can be deformed or not. In a cusped manifold, one can ask about the existence of deformations that are trivial on the boundary. We prove that if the canonical projective structure of a cusped manifold is infinitesimally projectively rigid relative to the boundary, then infinitely many Dehn fillings are projectively rigid. We analyze in more detail the figure eight knot and the Withehead link exteriors, for which we can give explicit infinite families of slopes with projectively rigid Dehn fillings.Comment: Accepted for publication at G

Topics: Mathematics - Geometric Topology, Mathematics - Differential Geometry
Publisher: 'Mathematical Sciences Publishers'
Year: 2011
DOI identifier: 10.2140/gt.2011.15.2017
OAI identifier: oai:arXiv.org:0908.2863

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