scientific article; zbMATH DE number 3399829

zbMath0253.41025MaRDI QIDQ5666994

Walter Trebels, R. J. Nessel, Paul L. Butzer

Publication date: 1972

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

Mathematics Subject Classification ID

Classical almost periodic functions, mean periodic functions (42A75) Hermitian and normal operators (spectral measures, functional calculus, etc.) (47B15) Fourier and Fourier-Stieltjes transforms and other transforms of Fourier type (42A38) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) General harmonic expansions, frames (42C15) Rate of convergence, degree of approximation (41A25) Multipliers in one variable harmonic analysis (42A45) Summability and absolute summability of Fourier and trigonometric series (42A24)

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