Harmonic analysis on real reductive symmetric spaces
arXiv:math/0304322
Abstract
Let be a reductive group in the Harish-Chandra class e.g. a connected semisimple Lie group with finite center, or the group of real points of a connected reductive algebraic group defined over . Let be an involution of the Lie group , an open subgroup of the subgroup of fixed points of . One decomposes the elements of with the help of joint eigenfunctions under the algebra of left invariant differential operators under on .