Geodesic
Properties of a Family of Operators
Matematičeskie zametki, Tome 69 (2001) no. 3, pp. 412-426 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this paper we define a family of new nonsymmetric operators of generalized translation and describe their properties. For each of these operators, we introduce a generalized modulus of smoothness, for which the direct and inverse theorems of approximation theory are given. 
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M. K. Potapov. Properties of a Family of Operators. Matematičeskie zametki, Tome 69 (2001) no. 3, pp. 412-426. http://geodesic.mathdoc.fr/item/MZM_2001_69_3_a9/

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