On the approximation in the mean of functions of the classes H[?]L by de La Vallee Poussin sums
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Publication:5638714
DOI10.1007/BF01089126zbMath0231.42003OpenAlexW2076009425MaRDI QIDQ5638714
Publication date: 1972
Published in: Ukrainian Mathematical Journal (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1007/bf01089126
Trigonometric approximation (42A10) Convergence and absolute convergence of Fourier and trigonometric series (42A20)
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Approximation of periodic functions by trigonometric polynomials in the mean ⋮ Some extremal problems of theory of quadrature and approximation of functions
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