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《分析,理论与应用(英文版)》 2006-02
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Laiyi Zhu (People’s University of China, China)  
We study some approximation properties of Lagrange interpolation polynomial based on the ze- ros of (1 ? x2) cos n arccos x. By using a decomposition for f(x) ∈ CrCr+1 we obtain an estimate of f(x)?Ln+2(f, x) which re?ects the in?uence of the position of the x’s and ω(f(r+1), δ)j, j = 0, 1, ··· , s, on the error of approximation.
【Fund】: Supported by the National Nature Science Foundation.
【CateGory Index】: O174.42
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