Commensurators of thin normal subgroups and abelian quotients

Geometric group theory (20F65) Discrete subgroups of Lie groups (22E40) General geometric structures on low-dimensional manifolds (57M50) Hyperbolic groups and nonpositively curved groups (20F67)

Cites Work

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The virtual Haken conjecture (with an appendix by Ian Agol, Daniel Groves and Jason Manning).
Commensurated subgroups of arithmetic groups, totally disconnected groups and adelic rigidity
Pattern rigidity and the Hilbert-Smith conjecture.
On discreteness of commensurators
Commensurators of finitely generated nonfree Kleinian groups.
Asymptotic properties of linear groups
Pattern rigidity in hyperbolic spaces: duality and PD subgroups.
Virtual Betti numbers of compact locally symmetric spaces
Relative rigidity, quasiconvexity and $C$-complexes.
Symmetric patterns of geodesics and automorphisms of surface groups
Rigidity of commensurators and irreducible lattices
Rigidity, unitary representations of semisimple groups, and fundamental groups of manifolds with rank one transformation group
Über das Verhalten der Integrale 1. Gattung bei Automorphismen des Funktionenkörpers
The quasi-isometry classification of rank one lattices
Über modulare Darstellungen endlicher Gruppen, die von freien Gruppen induziert werden
Notes on Thin Matrix Groups
L 2 Harmonic Forms on Rotationally Symmetric Riemannian Manifolds
A Report on Harmonic Maps
On the spectral geometry of spaces with cone-like singularities
The $L^2$-harmonic forms on rotationally symmetric Riemannian manifolds revisited
Commutators, commensurators, and PSL2(Z)
Homotopical height
Residually finite rationally solvable groups and virtual fibring
Hyperplane sections in arithmetic hyperbolic manifolds
Density and maximality of arithmetic subgroups.