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A three-manifold is a space that locally looks like Euclidean three-dimensional space

18 votes
3 answers
1k views

How to see isometries of figure 8 knot complement

The figure 8 knot complement $M$ is the orientable double cover of the Gieseking manifold, which implies that $M$ has a fixed-point free involution. If we think of $M$ with its hyperbolic metric, this …
Michael Siler's user avatar
14 votes
Accepted

Heegaard splitting of covering hyperbolic manifold.

There are examples like this. Check out section 4.5 of Shalen's paper "Hyperbolic volume, Heegaard genus and ranks of groups." It's here: http://arxiv.org/abs/0904.0191 He gives a reference for a gen …
Michael Siler's user avatar
8 votes
1 answer
970 views

When are isometry groups of hyperbolic 3-manifolds finite?

If $M$ is a finite volume hyperbolic 3-manifold, then its isometry group is finite. I believe this is also true for geometrically finite 3-manifolds. What is the most general condition on a hyperbolic …
Michael Siler's user avatar