3 papers
math.FA2026
Structured coordinate systems in
Daniel Freeman, Lukas Liehr, Mitchell A. Taylor
We construct Schauder bases of with significant structural constraints on their elements. First, we construct non-negative Schauder bases of for…
math.FA2025
The Cahill-Casazza-Daubechies problem on Hölder stable phase retrieval
Daniel Freeman, Mitchell A. Taylor
Phase retrieval using a frame for a finite-dimensional Hilbert space is known to always be Lipschitz stable. However, phase retrieval using a frame or a continuous frame for an inf…
cs.IT2025
On sharp stable recovery from clipped and folded measurements
Pedro Abdalla, Daniel Freeman, João P. G. Ramos +1
We investigate the stability of vector recovery from random linear measurements which have been either clipped or folded. This is motivated by applications where measurement device…