Geodesic
The Approximation of Functions by Transformed Fourier–Vilenkin Series in the Hölder Norm
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 13 (2013) no. 1, pp. 72-76 
T. V. Likhacheva. The Approximation of Functions by Transformed Fourier–Vilenkin Series in the Hölder Norm. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 13 (2013) no. 1, pp. 72-76. http://geodesic.mathdoc.fr/item/ISU_2013_13_1_a17/
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Voir la notice de l'article provenant de la source Math-Net.Ru

Using the oscillations of rows from matrix $A$, we obtain an estimate for the degree of approximation in Hölder metric by linear means of Fourier–Vilenkin series generated by $A$.

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