Kofanov, V. A. Best uniform approximation of differentiable functions by algebraic polynomials. (English) Zbl 0506.41025 Math. Notes 27, 190-195 (1980). MSC: 41A50 41A10 42A10 PDF BibTeX XML Cite \textit{V. A. Kofanov}, Math. Notes 27, 190--195 (1980; Zbl 0506.41025) Full Text: DOI
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. 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