Geodesic
Approximation of function classes in spaces with mixed
Sbornik. Mathematics, Tome 197 (2006) no. 8, pp. 1121-1144 Cet article a éte moissonné depuis la source Math-Net.Ru

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Estimates for the order of approximation of Besov classes in Lorentz spaces with anisotropic norm are obtained. Bibliography: 24 titles. 
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G. A. Akishev. Approximation of function classes in spaces with mixed. Sbornik. Mathematics, Tome 197 (2006) no. 8, pp. 1121-1144. http://geodesic.mathdoc.fr/item/SM_2006_197_8_a1/

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