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Found 408 Documents (Results 1–100)

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Superconvergent algorithms for the numerical solution of the Laplace equation in smooth axisymmetric domains. (English. Russian original) Zbl 1471.65206

Comput. Math. Math. Phys. 60, No. 4, 545-557 (2020); translation from Zh. Vychisl. Mat. Mat. Fiz. 60, No. 4, 553-566 (2020).
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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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The linearity coefficient of metric projections onto one-dimensional Chebyshev subspaces of the space \(C\). (English. Russian original) Zbl 1321.41048

Math. Notes 96, No. 4, 556-562 (2014); translation from Mat. Zametki 96, No. 4, 588-595 (2014).
MSC:  41A65 41A52 41A40
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Moduli of smoothness and rate of a.e. convergence for some convolution operators. (English) Zbl 1271.41008

Bilyk, Dmitriy (ed.) et al., Recent advances in harmonic analysis and applications. In honor of Konstantin Oskolkov on the occasion of his 65th birthday. Based on the AMS sectional meeting, Georgia Southern University, Statesboro, GA, USA, March 11–13, 2011. Berlin: Springer (ISBN 978-1-4614-4564-7/hbk; 978-1-4614-4565-4/ebook). Springer Proceedings in Mathematics & Statistics 25, 339-355 (2013).
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On a family of positive linear integral operators. (English) Zbl 1248.41026

Brändén, Petter (ed.) et al., Notions of positivity and the geometry of polynomials. Dedicated to the memory of Julius Borcea. Basel: Birkhäuser (ISBN 978-3-0348-0141-6/hbk; 978-3-0348-0142-3/ebook). Trends in Mathematics, 259-274 (2011).
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Directional approximation of functions of two variables in the spaces \(\mathcal L_p (\mathbb R^{2})\) and \(\mathcal L_p (\mathbb R _{+}^{2})\). (English. Russian original) Zbl 1149.42007

Vestn. St. Petersbg. Univ., Math. 41, No. 2, 102-112 (2008); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 2008, No. 2, 23-33 (2008).
MSC:  42B20 41A40 41A17
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Problems of approximation in Hölder norms. (English) Zbl 1156.41009

Jiménez Pozo, Miguel Antonio (ed.) et al., Tópicos de teoría de la aproximación II. Puebla: Benemérita Universidad Autónoma de Puebla (ISBN 978-968-9282-41-2/pbk). 9-48 (2007).
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On approximate characteristics of functions of many variables occurring in saturation classes of continuity moduli of different orders. (Russian, English) Zbl 1114.41014

J. Math. Sci., New York 139, No. 1, 6223-6337 (2006); translation from Probl. Mat. Anal. 33, 79-90 (2006).
MSC:  41A40 41A17
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On the best approximation properties of \(C^\infty\)-smooth functions on an interval of the real axis (to the phenomenon of unsaturated numerical methods). (Russian, English) Zbl 1102.65014

Sib. Mat. Zh. 46, No. 3, 483-489 (2005); translation in Sib. Math. J. 46, No. 3, 373-385 (2005).
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Saturation class of derivatives of linear positive operators. (English) Zbl 1061.41016

Neamtu, Marian (ed.) et al., Advances in constructive approximation: Vanderbilt 2003. Proceedings of the international conference, Nashville, TN, USA, May 14–17, 2003. Brentwood, TN: Nashboro Press (ISBN 0-9728482-2-3/hbk). Modern Methods in Mathematics, 311-324 (2004).
MSC:  41A40 41A36
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\(K\)-functionals on \(L^1 (\mathbb{R}^n)\) related to the Laplacian. (English) Zbl 1045.41012

Beckner, William (ed.) et al., Harmonic analysis at Mount Holyoke. Proceedings of an AMS-IMS-SIAM joint summer research conference, Mount Holyoke College, South Hadley, MA, USA, June 25–July 5, 2001. Providence, RI: American Mathematical Society (AMS) (ISBN 0-8218-2903-3/pbk). Contemp. Math. 320, 459-465 (2003).
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Saturation of \(k\)-convex operators. (English) Zbl 1054.41016

Madaune-Tort, M. (ed.) et al., 7th Zaragoza-Pau conference on applied and statistical mathematics, Jaca (Huesca), September 17–18, 2001. Zaragoza: Univ. de Zaragoza, Seminario Matemático “García de Galdeano” (ISBN 84-96214-04-4/pbk). Monogr. Semin. Mat. “García de Galdeano” 27, 161-168 (2003).
MSC:  41A40 41A36
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Saturation of linear methods of summation of the Fourier series in \(S^{p}_{\varphi}\) spaces. (Ukrainian) Zbl 1129.42315

Stepanets’, O.I. (ed.), Teoriya nablyzhennya funktsij ta sumizhni pytannya. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2617-9). Pratsi Instytutu Matematyky Natsional’noï Akademiï Nauk Ukraïny. Matematyka ta {ïï} Zastosuvannya 35, 215-232 (2002).
MSC:  42A10 41A40 42A45
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On saturation in conservative approximation. (English) Zbl 1058.41016

Gasca, Mariano (ed.), Multivariate approximation and interpolation with applications. Proceedings of the 6th international workshop, MAIA 2001, Almuñécar, Spain, September 10–14, 2001. Zaragoza: Academia de Ciencias Exactas, Físicas, Químicas y Naturales de Zaragoza. Monogr. Acad. Cienc. Exactas Fís. Quím. Nat. Zaragoza 20, 59-67 (2002).
MSC:  41A40 41A35
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Abstract interpolation scheme for harmonic functions. (English) Zbl 1040.47010

Alpay, Daniel et al., Interpolation theory, systems theory and related topics. The Harry Dym anniversary volume. Basel: Birkhäuser (ISBN 3-7643-6762-8/hbk). Oper. Theory, Adv. Appl. 134, 287-317 (2002).
MSC:  47A57 41A40
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Average widths and optimal recovery of some classes of multivariate smooth functions. (English. English summary) Zbl 1027.41027

Kovtunets, V. V. (ed.), Approximation theory and its applications. Proceedings of the international conference dedicated to the memory of Vladislav Kirillovich Dzyadyk held in Kiev, Ukraine, May 27-31, 1999. Kyïv: Instytut Matematyky NAN Ukraïny. Pr. Inst. Mat. Nats. Akad. Nauk Ukr., Mat. Zastos. 31, 215-226 (2000).
MSC:  41A40 46E35 41A60
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A Voronovskaja-type formula and preservation properties of a class of operators. (English) Zbl 0988.41014

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, Schriftenreihe des Fachbereichs Mathematik der Gerhard-Mercator-Universität. 120-123 (2000).
MSC:  41A40 41A35
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