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Translated from Matematicheskie Zametki, Vol. 51, No. 3, pp. 35–46, March, 1992.
The author expresses gratitude to I. A. Shevchuk for statement of the subject and valuable discussions.
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Kopotun, K.A. Uniform estimates of the coconvex approximation of functions by polynomials. Math Notes 51, 245–254 (1992). https://doi.org/10.1007/BF01206386
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DOI: https://doi.org/10.1007/BF01206386