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Found 58 Documents (Results 1–58)

Approximation of functions by linear summation methods in the Orlicz-type spaces. (English. Ukrainian original) Zbl 1448.42011

J. Math. Sci., New York 249, No. 5, 705-719 (2020); translation from Ukr. Mat. Visn. 17, No. 2, 152-170 (2020).
MSC:  42A24 42A10 40D99
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Approximation of functions by some exponential-type operators. (English) Zbl 1445.41013

Ivanov, Kamen (ed.) et al., Constructive theory of functions. Proceedings of the 12th international conference, Sozopol, Bulgaria, June 11–17, 2016. Sofia: Prof. Marin Drinov Academic Publishing House. 143-158 (2018).
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Moduli of smoothness and polynomial approximation on the unit sphere. (English) Zbl 1445.41001

Ivanov, Kamen (ed.) et al., Constructive theory of functions. Proceedings of the 12th international conference, Sozopol, Bulgaria, June 11–17, 2016. Sofia: Prof. Marin Drinov Academic Publishing House. 51-58 (2018).
MSC:  41A10 41A17 41A25
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Approximation with positive linear operators and linear combinations. (English) Zbl 1371.41035

Developments in Mathematics 50. Cham: Springer (ISBN 978-3-319-58794-3/hbk; 978-3-319-58795-0/ebook). xiii, 186 p. (2017).
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Approximation of functions in \( L^{p(x)}_{2\pi}\) by trigonometric polynomials. (English. Russian original) Zbl 1270.42005

Izv. Math. 77, No. 2, 407-434 (2013); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 77, No. 2, 197-224 (2013).
MSC:  42A10 46E30
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Direct and inverse theorems in the theory of approximation of Banach space vectors by exponential type entire vectors. (English) Zbl 1180.41013

Adamyan, Vadim (ed.) et al., Modern analysis and applications. The Mark Krein centenary conference. Volume 1: Operator theory and related topics. Papers based on invited talks at the international conference on modern analysis and applications, Odessa, Ukraine, April 9–14, 2007. Basel: Birkhäuser (ISBN 978-3-7643-9918-4/v.1; 978-3-7643-9919-1/ebook; 978-3-7643-9924-5/set). Operator Theory: Advances and Applications 190, 295-314 (2009).
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Direct and converse results for Stancu operators. (English) Zbl 0995.41001

Gonska, H. (ed.) et al., RoGer 2000-Braşov. Proceedings of the 4th Romanian-German seminar on approximation theory and its applications, Braşov, Romania, July 3-5, 2000. Duisburg: Gerhard-Mercator-Universität Duisburg, Fachbereich Mathematik, Schr.reihe Inst. Math., Univ. Duisburg. 44-46 (2000).
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Direct and inverse theorems of approximation theory in the spaces \(L_ p\) with \(0<p<1\). (English. Russian original) Zbl 0816.42014

Russ. Acad. Sci., Dokl., Math 48, No. 1, 210-213 (1994); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 331, No. 6, 684-686 (1993).
Reviewer: C.Badea (Orsay)
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Function spaces and questions of approximation on the Heisenberg group. (English. Russian original) Zbl 0838.43003

Proc. Steklov Inst. Math. 201, 205-227 (1994); translation from Tr. Mat. Inst. Steklova 201, 245-272 (1992).
Reviewer: A.A.Kilbas (Minsk)
MSC:  43A15 41A65 46E35
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