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Matrix transformations of series of orthogonal polynomials

Published online by Cambridge University Press:  26 February 2010

David Borwein
Affiliation:
Department of Mathematics, University of Western Ontario, London, Ontario, Canada.
Peter Borwein
Affiliation:
Department of Mathematics and Statistics, Simon Fraser University, Burnaby, British Columbia, Canada, VSA 1S6.
Ammon Jakimovski
Affiliation:
School of Mathematical Sciences, Tel Aviv University, Tel Aviv, Israel.
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Abstract

For a sequence of polynomials (Pn) orthonormal on the interval [−1, 1], we consider the sequence of transforms (gn) of the series given by . We establish necessary and sufficient conditions on the matrix (bnk) for the sequence (gn) to converge uniformly on compact subsets of the interior of an appropriate ellipse to a function holomorphic on that interior.

Type
Research Article
Copyright
Copyright © University College London 1995

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References

1.Borwein, D. and Jakimovski, A.. Matrix transformations of power series. Proc. Amer. Math. Soc, 122 (1994), 511523.CrossRefGoogle Scholar
2.Erdélyi, T.. Nikolskii-type inequalities of generalized polynomials and zeros of orthogonal polynomials. J. Approximation Theory, 67 (1991), 8092.CrossRefGoogle Scholar
3.Hille, E.. Analytic Function Theory (Blaisdell, New York, 1963).Google Scholar
4.Lejà, M. F.. Sur la sommation des séries entières par la methode des moyennes. Bull. Sci. Math., 54 (1930), 239245.Google Scholar
5.Lorentz, G. G.. Approximation of Functions (Chelsea, New York, 1986).Google Scholar
6.Luh, W.. Über die Nürlund-Summierbarkeit von Potenzreihen. Period. Math. Hungar., 5 (1974), 4760.CrossRefGoogle Scholar
7.Luh, W.. Summierbarkeit von Potenzreihen-notwendige Bedingungen. Mitteilungen Math. Sem. Giessen, 113 (1974), 4867.Google Scholar
8.Peyerimhoff, A.. Lectures on Summability, vol. 107. Springer-Verlag Lecture Notes in Mathematics (New York, 1969).Google Scholar
9.Stadtmüller, K.. Summability of power series by non-regular Nörlund methods. J. Approximation Theory, 68 (1992), 3344.CrossRefGoogle Scholar
10.Stadtmüller, K. and Grosse-Erdmann, K. G.. Characterization of summability points of Nörlund methods. Trans. Amer. Math. Soc, 347 (1995), 25632579.Google Scholar
11.Szegö, G.. Orthogonal Polynomials (Amer. Math. Soc., 1967).Google Scholar