In metrics of the spaces L s , 1 ≤ s ≤ 1, we establish asymptotic equalities for the upper bounds of approximations by Fourier sums in the classes of generalized Poisson integrals of periodic functions that belong to the unit ball in the space L 1 .
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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 69, No. 5, pp. 695–704, May, 2017.
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Serdyuk, A.S., Stepanyuk, T.A. Approximation of the Classes of Generalized Poisson Integrals by Fourier Sums in Metrics of the Spaces L S . Ukr Math J 69, 811–822 (2017). https://doi.org/10.1007/s11253-017-1397-4
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DOI: https://doi.org/10.1007/s11253-017-1397-4