Geodesic
Approximation properties of mixed series in terms of Legendre polynomials on the classes $W^r$
Sbornik. Mathematics, Tome 197 (2006) no. 3, pp. 433-452 Cet article a éte moissonné depuis la source Math-Net.Ru

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The study of the approximation properties on the class $W^r$ of partial sums of a mixed series in terms of Legendre polynomials is continued. Bibliography: 7 titles. 
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I. I. Sharapudinov. Approximation properties of mixed series in terms of Legendre polynomials on the classes $W^r$. Sbornik. Mathematics, Tome 197 (2006) no. 3, pp. 433-452. http://geodesic.mathdoc.fr/item/SM_2006_197_3_a6/

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