On Quadratic Distinction of Automorphic Sheaves
On Quadratic Distinction of Automorphic Sheaves
We prove a geometric version of a classical result on the characterization of an irreducible cuspidal automorphic representation of being the base change of a stable cuspidal representation of the quasi-split unitary group associated to the quadratic extension E/F, via the nonvanishing of certain period integrals, called being distinguished. We …