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The approximation by partial sums of Fourier series. (English) Zbl 0060.18510


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References:

[1] M. L. Cartwright, On analytic functions regular in the unit circle, Quart. J. Math. vol. 4 (1933) pp. 246-247. · Zbl 0008.11803
[2] G. H. Hardy and J. E. Littlewood, Some properties of conjugate functions, J. Reine Angew. Math. vol. 167 (1932) pp. 405-423. · Zbl 0003.20203
[3] Ch. J. de la Vallée Poussin, Leçons sur l’approximation, Paris, 1919. · JFM 47.0908.02
[4] A. Zygmund, Smooth functions, Duke Math. J. 12 (1945), 47 – 76. · Zbl 0060.13806
[5] -, Trigonometrical series, Warszawa-Lwów, 1935. · Zbl 0011.01703
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