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math.CA2019
Diagonalization of Shift-Preserving Operators
Alejandra Aguilera, Carlos Cabrelli, Diana Carbajal +1
In this note we study the structure of shift-preserving operators acting on a finitely generated shift-invariant space. We define a new notion of diagonalization for these operator…
math.CA2017
Riesz Bases of Exponentials on Unbounded Multi-tiles
Carlos Cabrelli, Diana Carbajal
We prove the existence of Riesz bases of exponentials of L^2(Omega), provided that Omega in R^d is a measurable set of finite and positive measure, not necessarily bounded, that sa…