Geodesic
About approximation multinominals, orthogonal on any grids
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 8 (2008) no. 1, pp. 25-31

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In this work are investigated approximation properties of multinominals $\hat p_n(x)$, orthogonal with weight $\Delta t_j$ on the any grids consisting of final number of points of a piece $[-1,1]$. Namely the approximation formula, in which is established at increase $n$ together with $N$, approximation behaviour of these multinominals close to approximation behaviour of multinominals Lasiandra. 
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A. A. Nurmagomedov. About approximation multinominals, orthogonal on any grids. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 8 (2008) no. 1, pp. 25-31. http://geodesic.mathdoc.fr/item/ISU_2008_8_1_a4/