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Literature cited
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Translated from Matematicheskie Zametki, Vol. 25, No. 4, pp. 619–628, April, 1979.
In conclusion, the author thanks his guide V. M. Tikhomirov for useful discussion of the problem and assistance.
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Pukhov, S.V. Inequalities between the Kolmogorov and the Bernstein diameters in a Hilbert space. Mathematical Notes of the Academy of Sciences of the USSR 25, 320–326 (1979). https://doi.org/10.1007/BF01688487
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DOI: https://doi.org/10.1007/BF01688487