Displaying similar documents to “Existence of compact quotients of homogeneous spaces, measurably proper actions, and decay of matrix coefficients”

Minimality and unique ergodicity for subgroup actions

Shahar Mozes, Barak Weiss (1998)

Annales de l'institut Fourier

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Let G be an -algebraic semisimple group, H an algebraic -subgroup, and Γ a lattice in G . Partially answering a question posed by Hillel Furstenberg in 1972, we prove that if the action of H on G / Γ is minimal, then it is uniquely ergodic. Our proof uses in an essential way Marina Ratner’s classification of probability measures on G / Γ invariant under unipotent elements, and the study of “tubes” in G / Γ .