Vertex Operators, Solvable Lattice Models and Metaplectic Whittaker Functions

Whittaker Functions on Metaplectic Groups

The theory of Whittaker functions is of crucial importance in the classical study of automorphic forms on adele groups. Motivated by the appearance of Whittaker functions for covers of reductive groups in the theory of multiple Dirichlet series, we provide a study of Whittaker functions on metaplectic covers of reductive groups over local fields. Thesis Supervisor: Benjamin Brubaker Title: Assi...

Metaplectic Whittaker Functions and Crystal Bases

We study Whittaker functions on nonlinear coverings of simple algebraic groups over a non-archimedean local field. We produce a recipe for expressing such a Whittaker function as a weighted sum over a crystal graph, and show that in type A, these expressions agree with known formulae for the p-part of Multiple Dirichlet Series.

Twisted Whittaker models for metaplectic groups

Metaplectic Whittaker Functions and Crystals of Type B

Let n be an integer and let F be a nonarchimedean local field whose characteristic is not a prime dividing n. Let μk be the group of k-th roots of unity in the algebraic closure of F ; we assume that μ2n ⊂ F . Let G be a split, simply-connected semisimple algebraic group over F . We assume that G is actually defined over the ring o of integers in F in such a way that K = G(o) is a special maxim...

Heredity of Whittaker Models on the Metaplectic Group

and the Whittaker models of the inducing representation π M (cf. Theorem 2 of [4]). In this paper, Rodier’s theorem on the “heredity” of Whittaker models is extended to the non-algebraic setting of the n-fold metaplectic cover G̃ of G, where n is a positive integer such that F contains all of the n-th roots of unity. The main result is stated as a theorem in §2. In order to illustrate the situat...