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Daghestan Electronic Mathematical Reports, 2015, Issue 4, Pages 1–14
DOI: https://doi.org/10.31029/demr.4.1
(Mi demr15)
 

This article is cited in 5 scientific papers (total in 5 papers)

Sobolev orthogonal polynomials, associated with the Chebyshev polynomials of the first kind

I. I. Sharapudinovab, M. G. Magomed-Kasumovab, S. R. Magomedova

a Daghestan Scientific Centre of RAS
b Vladikavkaz Scientific Centre of the RAS
Full-text PDF (413 kB) Citations (5)
References:
Abstract: Using Chebyshev polynomials $T_n(x)=\cos(n\arccos x) (n=0,1,\ldots)$, for any natural $r$ we build a new system of polynomials $\left\{T_{r,k}(x)\right\}_{k=0}^\infty$, orthonormal with respect to the Sobolev type inner product of the following form
$$ <f,g>=\sum_{\nu=0}^{r-1}f^{(\nu)}(-1)g^{(\nu)}(-1)+\int_{-1}^{1} f^{(r)}(t)g^{(r)}(t)\kappa(t) dt, $$
where $\kappa(t)=\frac2\pi(1-t^2)^{-\frac12}$. The convergence of the Fourier series by the system $\left\{T_{r,k}(x)\right\}_{k=0}^\infty$ is investigated. We consider the important special cases of systems of this type. For these instances we obtain explicit representations, that can be used in the study of asymptotic properties of functions $T_{r,k}(x)$ when $k\to\infty$ and study of the approximative properties of Fourier sums by the system $\left\{T_{r,k}(x)\right\}_{k = 0}^\infty$.
Keywords: orthogonal polynomials, Sobolev orthogonal polynomials, Chebyshev polynomials of the first kind.
Received: 07.10.2015
Revised: 18.11.2015
Accepted: 19.11.2015
Bibliographic databases:
Document Type: Article
UDC: 517.538
Language: Russian
Citation: I. I. Sharapudinov, M. G. Magomed-Kasumov, S. R. Magomedov, “Sobolev orthogonal polynomials, associated with the Chebyshev polynomials of the first kind”, Daghestan Electronic Mathematical Reports, 2015, no. 4, 1–14
Citation in format AMSBIB
\Bibitem{ShaMagMag15}
\by I.~I.~Sharapudinov, M.~G.~Magomed-Kasumov, S.~R.~Magomedov
\paper Sobolev orthogonal polynomials, associated with the Chebyshev polynomials of the first kind
\jour Daghestan Electronic Mathematical Reports
\yr 2015
\issue 4
\pages 1--14
\mathnet{http://mi.mathnet.ru/demr15}
\crossref{https://doi.org/10.31029/demr.4.1}
\elib{https://elibrary.ru/item.asp?id=27311207}
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  • This publication is cited in the following 5 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    Daghestan Electronic Mathematical Reports
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