Effective equidistribution for closed orbits of semisimple groups on homogeneous spaces

M. Einsiedler, G. Margulis, A. Venkatesh

Published 2007-08-30Version 1

We prove effective equidistribution, with polynomial rate, for large closed orbits of semisimple groups on homogeneous spaces, under certain technical restrictions (notably, the acting group should have finite centralizer in the ambient group). The proofs make extensive use of spectral gaps, and also of a closing lemma for such actions.