Abstract
We show that any finitely generated non-elementary Kleinian group has a co-final family of finite index normal subgroups with respect to which it has Property τ. As a consequence, any closed hyperbolic 3-manifold has a co-final family of finite index normal subgroups for which the infimal Heegaard gradient is positive.
| Original language | English |
|---|---|
| Pages (from-to) | 152-158 |
| Number of pages | 7 |
| Journal | Journal of Topology |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2008 |
Bibliographical note
Publisher Copyright:© 2007 London Mathematical Society.