Zhuk, V. V. Über einige genaue Ungleichungen zwischen den besten Approximationen. (Russian) Zbl 0254.42003 Izv. Vyssh. Uchebn. Zaved., Mat. 1973, No. 1(128), 51-56 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 42A10 Trigonometric approximation 41A50 Best approximation, Chebyshev systems 41A25 Rate of convergence, degree of approximation PDF BibTeX XML Cite \textit{V. V. Zhuk}, Izv. Vyssh. Uchebn. Zaved., Mat. 1973, No. 1(128), 51--56 (1973; Zbl 0254.42003)