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Sibirskii Matematicheskii Zhurnal, 2014, Volume 55, Number 6, Pages 1404–1423
(Mi smj2615)
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This article is cited in 9 scientific papers (total in 9 papers)
Influence of the choice of Lagrange interpolation nodes on the exact and approximate values of the Lebesgue constants
I. A. Shakirov Nabereznye Chelny Institute of Social-Pedagogical Technologies and Resources, Nabereznye Chelny, Russia
Abstract:
The behavior of the Lebesgue constants corresponding to two classical Lagrange interpolation polynomials is studied in dependence on the number of interpolation nodes uniformly distributed on the period divided into three classes. We obtain new exact and approximate formulas for the constants corresponding to each of these classes: the errors are estimated uniformly in the degree of a polynomial. Two standing problems are solved in interpolation theory that are connected with asymptotic equalities for Lebesgue constants.
Keywords:
Lagrange polynomials, interpolation nodes, uniform convergence, Lebesgue constants, error of formulas.
Received: 27.05.2014
Citation:
I. A. Shakirov, “Influence of the choice of Lagrange interpolation nodes on the exact and approximate values of the Lebesgue constants”, Sibirsk. Mat. Zh., 55:6 (2014), 1404–1423; Siberian Math. J., 55:6 (2014), 1144–1160
Linking options:
https://www.mathnet.ru/eng/smj2615 https://www.mathnet.ru/eng/smj/v55/i6/p1404
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