Multipliers between model spaces

A characterization of Schur multipliers between character-automorphic Hardy spaces

We give a new characterization of character-automorphic Hardy spaces of order 2 and of their contractive multipliers in terms of de Branges Rovnyak spaces. Keys tools in our arguments are analytic extension and a factorization result for matrix-valued analytic functions due to Leech.

Multipliers of generalized frames in Hilbert spaces

Multipliers of Spaces of Derivatives

For subspaces, X and Y , of the space, D, of all derivatives M(X, Y ) denotes the set of all g ∈ D such that fg ∈ Y for all f ∈ X. Subspaces of D are defined depending on a parameter p ∈ [0,∞]. In Section 6, M(X, D) is determined for each of these subspaces and in Section 7, M(X, Y ) is found for X and Y any of these subspaces. In Section 3, M(X, D) is determined for other spaces of functions o...

L-multipliers for Noncompact Symmetric Spaces.

Let G be a real noncompact semi-simple Lie group with finite center and K a maximal compact sub-group. The symmetric space M = G/K carries a measure invariant under the action of G. The operators which map L(p)(M) continuously into itself and commute with the action of G, can be easily characterized when p = 2 or p = 1. This note gives some results on "singular integrals" which map L(p) into it...

Notes on the Spaces of Bilinear Multipliers

A locally integrable function m(ξ, η) defined on R × R is said to be a bilinear multiplier on R of type (p1, p2, p3) if Bm(f, g)(x) = Z