Polovina, A. I. Approximation of differentiable functions by algebraic polynomials. (English) Zbl 0424.41005 Ukr. Math. J. 30, 314-320 (1978). MSC: 41A10 PDF BibTeX XML Cite \textit{A. I. Polovina}, Ukr. Math. J. 30, 314--320 (1978; Zbl 0424.41005) Full Text: DOI
Polovina, A. I. Approximation differenzierbarer Funktionen vermittels algebraischer Polynome. (Russian) Zbl 0395.41001 Ukr. Mat. Zh. 30, 403-411 (1978). MSC: 41A10 PDF BibTeX XML Cite \textit{A. I. Polovina}, Ukr. Mat. Zh. 30, 403--411 (1978; Zbl 0395.41001)
Polovina, A. I. Über die beste gleichmäßige Approximation differenzierbarer Funktionen durch algebraische Polynome. (German) Zbl 0202.34601 Izv. Vyssh. Uchebn. Zaved., Mat. 1969, No. 12(91), 76-82 (1969). PDF BibTeX XML Cite \textit{A. I. Polovina}, Izv. Vyssh. Uchebn. Zaved., Mat. 1969, No. 12(91), 76--82 (1969; Zbl 0202.34601)
Polovina, A. I. On the best approximation of continuous functions on the section \([-1, 1]\). (Ukrainian) Zbl 0132.29103 Dopov. Akad. Nauk Ukr. RSR 1964, 722-725 (1964). PDF BibTeX XML Cite \textit{A. I. Polovina}, Dopov. Akad. Nauk Ukr. RSR 1964, 722--725 (1964; Zbl 0132.29103)