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math.DS2004★ 3 cited
Local rigidity of affine actions of higher rank groups and lattices
David Fisher, Gregory Margulis
Let be a semisimple Lie group with all simple factors of real rank at least two. Let be a lattice. We prove a very general local rigidity result about actions of or $…
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…