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 |
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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.