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Mathematics of the USSR-Sbornik, 1985, Volume 51, Issue 1, Pages 141–167
DOI: https://doi.org/10.1070/SM1985v051n01ABEH002852
(Mi sm1991)
 

This article is cited in 7 scientific papers (total in 7 papers)

Construction and investigation of solutions of differential equations by methods in the theory of approximation of functions

A. V. Babin
References:
Abstract: The steady-state equation $Au_0=f$, the parabolic Cauchy problem $u_1'(t)=Au_1(t)$, $u_1(0)=f$, and the hyperbolic problem $u_2''(t)=Au_2(t)$, $u_2(0)=f$, $u_2'(0)=0$, are considered, where $A$ is a matrix-valued positive selfadjoint second-order partial differential operator with analytic coefficients, and $f$ is an analytic function.
Methods in the theory of weighted approximation of functions by polynomials on the line are used to construct polynomial representations of solutions of these problems of the form $u_i=\lim_{h\to\infty}P_n^i(A)f$, where the polynomials $P_n^i(\lambda)$, $i=0,1,2$, are constructed in explicit form. Estimates of the rate of convergence are given. With the help of these estimates and Bernstein's inverse theorems in approximation theory, theorems are obtained on the smoothness and analyticity of solutions of degenerate systems whose coefficients are trigonometric polynomials.
Bibliography: 9 titles.
Received: 10.11.1982
Bibliographic databases:
UDC: 517.944
MSC: Primary 35A35, 35B65, 41A10; Secondary 35A10, 35A30, 35C99, 41A17, 41A25, 42A10
Language: English
Original paper language: Russian
Citation: A. V. Babin, “Construction and investigation of solutions of differential equations by methods in the theory of approximation of functions”, Math. USSR-Sb., 51:1 (1985), 141–167
Citation in format AMSBIB
\Bibitem{Bab84}
\by A.~V.~Babin
\paper Construction and investigation of solutions of differential equations by methods in the theory of approximation of functions
\jour Math. USSR-Sb.
\yr 1985
\vol 51
\issue 1
\pages 141--167
\mathnet{http://mi.mathnet.ru//eng/sm1991}
\crossref{https://doi.org/10.1070/SM1985v051n01ABEH002852}
\mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=732383}
\zmath{https://zbmath.org/?q=an:0568.35006|0542.35038}
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  • This publication is cited in the following 7 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Математический сборник (новая серия) - 1964–1988 Sbornik: Mathematics
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    Abstract page:394
    Russian version PDF:106
    English version PDF:26
    References:78
     
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