Proceedings of the London Mathematical Society Advance Access originally published online on July 18, 2008
Proceedings of the London Mathematical Society 2009 98(2):325-364; doi:10.1112/plms/pdn033
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© 2008 London Mathematical Society
Angled decompositions of arborescent link complements
Mathematics Department
Temple University
Philadelphia, PA 19122
USA
Laboratoire de mathématiques
Université de Paris–Sud
91405 Orsay cedex
France
Francois.Gueritaud@normalesup.org
Received 18 December 2006. Revision received 24 January 2008.
This paper describes a way to subdivide a 3-manifold into angled blocks, namely polyhedral pieces that need not be simply connected. When the individual blocks carry dihedral angles that fit together in a consistent fashion, we prove that a manifold constructed from these blocks must be hyperbolic. The main application is a new proof of a classical, unpublished theorem of Bonahon and Siebenmann: that all arborescent links, except for three simple families of exceptions, have hyperbolic complements.
2000 Mathematics Subject Classification 57M25, 57M50.
Futer is partially supported by NSF grant DMS-0353717 (RTG), and Guéritaud is partially supported by NSF grant DMS-0103511.