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Smooth Factors of Projective Actions of Higher Rank Lattices and Rigidity

Presenter
February 12, 2015
Abstract
Ralf Spatzier University of Michigan This is joint work with Alex Gorodnik. We study smooth factors of projective action of higher rank lattices Γ in a semsimple group G on G/P, P a parabolic. Under a mild condition on existence of a differentiable sink, we show that these actions are C∞ conjugate to a projective action.