2 papers
math.FA2023
Diagonals of self-adjoint operators II: Non-compact operators
Marcin Bownik, John Jasper
Given a self-adjoint operator on a separable infinite-dimensional Hilbert space we study the problem of characterizing the set of all possible diagonals of .…
math.CA2021
Marcinkiewicz averages of smooth orthogonal projections on sphere
Marcin Bownik, Karol Dziedziul, Anna Kamont
We construct a single smooth orthogonal projection with desired localization whose average under a group action yields the decomposition of the identity operator. For any full rank…