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arXiv:1107.3308

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Title: Hyperbolicity of the complex of free factors
Authors: Mladen Bestvina, Mark Feighn
Categories: math.GR Group Theory (math.GT Geometric Topology)
Comments: bibliography updated, minor corrections, to appear in Advances in Mathematics
MSC: 20F645

Abstract: We develop the geometry of folding paths in Outer space and, as an application, prove that the complex of free factors of a free group of finite rank is hyperbolic.

Owner: Mark Feighn
Version 1: Sun, 17 Jul 2011 15:23:15 GMT
Version 2: Mon, 31 Oct 2011 20:42:08 GMT
Version 3: Sat, 10 Nov 2012 16:20:11 GMT
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