Browsing by Subject "Wavelets"
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- PublicationOpen AccessDemocracy functions and optimal embeddings for approximation spaces(2012) De Natividade, Maria; Garrigós Aniorte, Gustavo Adolfo; Hernández, Eugenio; Matemáticas
- PublicationOpen AccessDemocracy functions of wavelet bases in general Lorentz spaces(2011) De Natividade, Maria; Garrigós Aniorte, Gustavo Adolfo; Hernández, Eugenio; Matemáticas
- PublicationOpen AccessHaar frame characterizations of Besov–Sobolev spaces and optimal embeddings into their dyadic counterparts(Springer, 2023) Garrigós Aniorte, Gustavo Adolfo; Seeger, Andreas; Ullrich, Tino; MatemáticasWe study the behavior of Haar coefficients in Besov and Triebel-Lizorkin spaces on R , for a parameter range in which the Haar system is not an unconditional basis. First, we obtain a range of parameters, extending up to smoothness s<1, in which the spaces F(s,p,q) and B(s,p,q) are characterized in terms of doubly oversampled Haar coefficients (Haar frames). Secondly, in the case that 1/p