Dehn surgery and negatively curved 3-manifolds

Details Dehn surgery and negatively curved 3-manifolds Dehn surgery and negatively curved 3-manifolds

1998-11-12

arxiv.org/abs/math/9811082v1

Mathematics

Geometric Topology

35 pages, 2 figures. To be published in JDG

Scientific paper

We show that, for any given 3-manifold M, there are at most finitely many hyperbolic knots K in the 3-sphere and fractions p/q (with q > 22), such that M is obtained by p/q surgery along K. This is a corollary of the following result. If M is obtained by Dehn filling the cusps of a hyperbolic 3-manifold X, where each filling slope has length more than 2 \pi + \epsilon, then, for any given M and \epsilon > 0, there are only finitely many possibilities for X and for the filling slopes. In this paper, we also investigate the length of boundary slopes, and sequences of negatively curved metrics on a given 3-manifold.

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