Kornejchuk, N. P.; Polovina, A. I. On the approximation of continuous functions by algebraic polynomials. (English) Zbl 0255.41004 Ukr. Math. J. 24(1972), 269-278 (1973). MSC: 41A10 PDF BibTeX XML Cite \textit{N. P. Kornejchuk} and \textit{A. I. Polovina}, Ukr. Math. J. 24, 269--278 (1973; Zbl 0255.41004) Full Text: DOI
Kornejchuk, N. P.; Polovina, A. I. Über die Approximation stetiger Funktionen vermittels algebraischer Polynome. (Russian) Zbl 0237.41003 Ukr. Mat. Zh. 24, 328-340 (1972). MSC: 41A10 PDF BibTeX XML Cite \textit{N. P. Kornejchuk} and \textit{A. I. Polovina}, Ukr. Mat. Zh. 24, 328--340 (1972; Zbl 0237.41003)
Kornejchuk, N. P.; Polovina, A. I. Algebraic-polynomial approximation of functions satisfying a Lipschitz condition. (English) Zbl 0226.41002 Math. Notes 9, 254-257 (1971). MSC: 41A10 41A15 41A25 PDF BibTeX XML Cite \textit{N. P. Kornejchuk} and \textit{A. I. Polovina}, Math. Notes 9, 254--257 (1971; Zbl 0226.41002) Full Text: DOI
Kornejchuk, N. P.; Polovina, A. I. Über die Approximation von Funktionen, die einer Lipschitzbedingung genügen, vermittels algebraischer Polynome. (Russian) Zbl 0216.38902 Mat. Zametki 9, 441-447 (1971). MSC: 41A10 41A15 41A25 PDF BibTeX XML Cite \textit{N. P. Kornejchuk} and \textit{A. I. Polovina}, Mat. Zametki 9, 441--447 (1971; Zbl 0216.38902)
Kornejchuk, N. P.; Polovina, A. I. Approximation of continuous and differentiable functions by algebraic polynomials on an interval. (English. Russian original) Zbl 0168.30701 Sov. Math., Dokl. 7, 66-68 (1966); translation from Dokl. Akad. Nauk SSSR 166, 281-283 (1966). PDF BibTeX XML Cite \textit{N. P. Kornejchuk} and \textit{A. I. Polovina}, Sov. Math., Dokl. 7, 66--68 (1966; Zbl 0168.30701); translation from Dokl. Akad. Nauk SSSR 166, 281--283 (1966)