Mathematics – Geometric Topology
Scientific paper
2006-11-22
Mathematics
Geometric Topology
60 pages, 4 figures
Scientific paper
We give new bounds for the distance between two exceptional filling slopes for a 1-cusped hyperbolic 3-manifold in several different situations. The distance between a reducible slope and a slope that produces a manifold with finite fundamental group is at most 2. The distance between a reducible slope and one that produces a very small manifold is also at most 2. The distance between a reducible slope and one which produces a manifold with a pi_1 injective torus is at most 4. The methods used involve both characteristic submanifold theory and the theory of the PSL(2,C) character variety.
Boyer Steve
Culler Marc
Shalen Peter B.
Zhang Xingru
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