Showing 2024Show all
2 papers · 1 filter
math.CA2024
On exponential frames near the critical density
Marcin Bownik, Jordy Timo van Velthoven
Given a relatively compact set of Lebesgue measure and , we show the existence of a set of uniform density $D…
math.CA2024
Selector form of Weaver's conjecture, Feichtinger's conjecture, and frame sparsification
Marcin Bownik
We show an extension of a probabilistic result of Marcus, Spielman, and Srivastava, which resolved the Kadison-Singer problem, for block diagonal positive semidefinite random matri…