Literature cited
V. K. Dzyadyk, “The approximation of functions by regular polynomials on a finite interval of the real axis,” Izv. Akad. Nauk SSSR, Ser. Matem.,22, No. 3 (1958).
V. K. Dzyadyk, “A further sharpening of a theorem of Jackson on the approximation of continuous functions by regular polynomials,” Dokl. Akad. Nauk SSSR,121, No. 3 (1958).
A. F. Timan, “A sharpening of a theorem of Jackson on the best approximation of continuous functions by polynomials on a finite interval of the real axis, ”Dokl. Akad. Nauk SSSR,78, No. 1 (1951).
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Translated from Ukrainskii Matematicheskii Zhurnal, Vol.20, No.2, pp.192–202, March–April, 1968.
The authors thank V. K. Dzyadyk for setting the problem and for his valuable advice.
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Stepanets, A.I., Polyakov, R.V. Approximation of continuous functions by regular polynomials. Ukr Math J 20, 176–184 (1968). https://doi.org/10.1007/BF01085531
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DOI: https://doi.org/10.1007/BF01085531