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Convergence and norm estimates of Hermite interpolation at zeros of Chevyshev polynomials
Kamel Al-Khaled1, Marwan Alquran1
1Mathematics and Statistics, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110 Jordan.
Abstract:
In this paper, we investigate the simultaneous approximation of a function f(x) and its derivative [Formula: see text] by Hermite interpolation operator [Formula: see text] based on Chevyshev polynomials. We also establish general theorem on extreme points for Hermite interpolation operator. Some results are considered to be an improvement over those obtained in Al-Khaled and Khalil (Numer Funct Anal Optim 21(5-6): 579-588, 2000), while others agrees with Pottinger's results (Pottinger in Z Agnew Math Mech 56: T310-T311, 1976).
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