3 papers
math.CA2025
On Wiener's Lemma on locally compact abelian groups
Philippe Jaming, Karim Kellay, Rolando Perez
We establish a general form of Wiener's lemma for measures on locally compact abelian (LCA) groups by using Fourier analysis and the theory of F{ø}lner sequences. Our approach prov…
math.CA2025
Phase retrieval for solutions of the Schr{ö}dinger equations
Philippe Jaming
In this note we present several questions about the phase retrieval problem for the Schr{ö}dinger equation. Some partial answers are given as well as some of the heuristics behind…
math.CA2025
Sign retrieval in spaces of variable bandwidth
Philippe Jaming, Rolando Perez
The aim of this paper is to get a deeper understanding of the spaces of variable bandwidth introduced by Gr{ö}chenig and Klotz (What is variable bandwidth? Comm. Pure Appl. Math.,…