58 citations · 106 across the 12 of their papers we have counts for
Showing 2003 · math.DSShow all
3 papers · 2 filters
math.DS2003★ 1 cited
Almost isometric actions, property , and local rigidity
David Fisher, G. A. Margulis
Let be a discrete group with property of Kazhdan. We prove that any Riemannian isometric action of on a compact manifold is locally rigid. We also prove a more ge…
math.DS2003
When is a group action determined by its orbit structure?
David Fisher, Kevin Whyte
We present a simple approach to questions of topological orbit equivalence for actions of countable groups on topological and smooth manifolds. For example, for any action of a cou…
math.DS2003★ 6 cited
Local Rigidity for Cocycles
David Fisher, G. A. Margulis
In this paper we study perturbations of constant cocycles for actions of higher rank semi-simple algebraic groups and their lattices. Roughly speaking, for ergodic actions, Zimmer'…