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Found 17 Documents (Results 1–17)

Approximation characteristics of classes of periodic functions of several variables. (Аппроксимативные характеристики классов периодичестих функций многих переменных.) (Russian) Zbl 1324.42001

Pratsi Instytutu Matematyky Natsional’noï Akademiï Nauk Ukraïny. Matematyka ta ïï Zastosuvannya 93. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 978-966-02-6692-6). 352 p. (2012).
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Error estimates of approximate solutions of infinite systems of equations by Gelfand numbers of tensor product operators. (Fehlerabschätzungen von Näherungslösungen unendlicher Gleichungssysteme durch Gelfandzahlen von Tensorproduktoperatoren.) (German) Zbl 0937.65061

Oldenburg: Univ. of Oldenburg, Department of Mathematics, 69 S. (1999).
MSC:  65J10 47B06 47A50 15A06 65F30 47A80 65Y20
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Some extremal problems on classes of functions determined by linear differential operators. (English. Russian original) Zbl 0729.42001

Math. USSR, Sb. 68, No. 1, 213-255 (1990); translation from Mat. Sb. 180, No. 10, 1355-1395 (1989).
Reviewer: B.Maslowski
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Asymptotic behavior of best approximations of individual functions in the classes \(W^ rH_{\omega}\) in the \(L_ p\)-metric. (English. Russian original) Zbl 0704.41017

Sov. Math., Dokl. 39, No. 3, 541-544 (1989); translation from Dokl. Akad. Nauk SSSR 306, No. 4, 777-781 (1989).
Reviewer: D.Khavinson
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Inequalities for rearrangements of differentiable periodic functions, approximation problems, and approximate integration. (English. Russian original) Zbl 0547.41027

Sov. Math., Dokl. 28, 470-474 (1983); translation from Dokl. Akad. Nauk SSSR 272, 1038-1041 (1983).
Reviewer: R.S.Dahiya
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