Krotov, V. G.; Osval’d, P.; Storozhenko, Eh. A. Direct and inverse theorems of Jackson type in \(L^p\) spaces \((0<p<1)\). (English. Russian original) Zbl 0339.41014 Sov. Math., Dokl. 17, 39-42 (1976); translation from Dokl. Akad. Nauk SSSR 226, 44-47 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 41A50 Best approximation, Chebyshev systems 41A10 Approximation by polynomials 42A10 Trigonometric approximation 41A25 Rate of convergence, degree of approximation 26A16 Lipschitz (Hölder) classes 42C10 Fourier series in special orthogonal functions (Legendre polynomials, Walsh functions, etc.) PDF BibTeX XML Cite \textit{V. G. Krotov} et al., Sov. Math., Dokl. 17, 39--42 (1976; Zbl 0339.41014); translation from Dokl. Akad. Nauk SSSR 226, 44--47 (1976)