We establish the exact-order estimates for the best approximations of functions from the anisotropic Nikol’skii–Besov classes of functions of several variables by entire functions in the Lebesgue spaces.
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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 70, No. 4, pp. 574–582, April, 2018.
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Yanchenko, S.Y. Best Approximation of the Functions from Anisotropic Nikol’skii–Besov Classes Defined in ℝd. Ukr Math J 70, 661–670 (2018). https://doi.org/10.1007/s11253-018-1523-y
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DOI: https://doi.org/10.1007/s11253-018-1523-y