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math.FA2024
Approximation spaces, greedy classes and Lorentz spaces
Miguel Berasategui, Pablo M. Berná, Andrea García
We characterize the approximation spaces of a broad class of bases - which includes almost greedy bases - in terms of weighted Lorentz spaces. For those bases, we also find necessa…
math.FA2024
Conditional bases with Property~(A)
Fernando Albiac, Jose L. Ansorena, Pablo Berná +1
Property~(A) is a week symmetry condition that plays a fundamental role in the characterization of greedy-type bases in the isometric case, i.e., when the constants involved in the…