Talk:Atoroidal 3-manifolds (Ex)
From Manifold Atlas
Revision as of 01:20, 8 January 2019 by Maggie Miller (Talk | contribs)
No. could for example be a lens space or .
We do know that because doesn’t contain a copy of , is atoroidal. Then by Perelman, is either reducible (and hence ), spherical, or hyperbolic.