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Translated from Matematicheskie Zametki, Vol. 52, No. 3, pp. 48–62, September, 1992.
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Ivanov, V.I. Lower bound on constant in Jackson inequality in different Lp-norms. Math Notes 52, 906–918 (1992). https://doi.org/10.1007/BF01209610
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DOI: https://doi.org/10.1007/BF01209610