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math.NA2021
Lipschitz widths
Guergana Petrova, Przemyslaw Wojtaszczyk
This paper introduces a measure, called Lipschitz widths, of the optimal performance possible of certain nonlinear methods of approximation. It discusses their relation to entropy…
math.FA2021
Lorentz spaces and embeddings induced by almost greedy bases in superreflexive Banach spaces
José L. Ansorena, Glenier Bello, Przemysław Wojtaszczyk
The aim of this paper is to show that almost greedy bases induce tighter embeddings in superreflexive Banach spaces than in general Banach spaces. More specifically, we show that a…