Browsing by Subject "Thresholding Chebyshev greedy algorithm"

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    Lebesgue inequalities for Chebyshev thresholding greedy algorithms
    (Springer, 2020) Berná, Pablo M.; Blasco, Óscar; Garrigós Aniorte, Gustavo Adolfo; Hernández, Eugenio; Oikhberg, Timur; Matemáticas
    We establish estimates for the Lebesgue parameters of the Chebyshev Weak Thresholding Greedy Algorithm in the case of general bases in Banach spaces. These generalize and slightly improve earlier results in [9], and are complemented with examples showing the optimality of the bounds. Our results also correct certain bounds recently announced in [18], and answer some questions left open in that paper