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math.FA2025
Best -term trigonometric approximation in weighted Wiener spaces and applications
Moritz Moeller, Serhii Stasyuk, Tino Ullrich
In this paper we study best \(m\)-term trigonometric approximation in weighted Wiener spaces and its consequences for Besov and Sobolev spaces with bounded mixed derivative/differe…
math.FA2025
Sampling projections in the uniform norm
David Krieg, Kateryna Pozharska, Mario Ullrich +1
We show that there are sampling projections on arbitrary -dimensional subspaces of with at most samples and norm of order , where is the space of co…