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Let |$G$| be a real reductive algebraic group, and let |$H\subset G$| be an algebraic subgroup. It is known that the action of |$G$| on the space of functions on |$G/H$| is "tame" if this space is spherical. In particular, the multiplicities of the space |${\mathcal {S}}(G/H)$| of Schwartz functions on |$G/H$| are finite in this case. In this paper, we formulate and analyze a generalization of sphericity that implies finite multiplicities in |${\mathcal {S}}(G/H)$| for small enough irreducible representations of |$G$|⁠. [ABSTRACT FROM AUTHOR]

We prove vanishing of distribution on p-adic spherical spaces that are equivariant with respect to a generic character of the nilradical of a Borel subgroup and satisfy a certain condition on the wave-front set. We deduce from this nonvanishing of spherical Bessel functions for Galois symmetric pairs. [ABSTRACT FROM AUTHOR]

The goal of this paper we extend the notions of Schwartz functions, tempered functions, and generalized Schwartz functions to Nash (i.e. smooth semi-algebraic) manifolds. We reprove for this case the classically known properties of Schwartz functions on and build some additional tools that are important in representation theory. [ABSTRACT FROM PUBLISHER]