Geodesic
Direct Theorems on Approximation of Periodic Functions with High Generalized Smoothness
Matematičeskie zametki, Tome 113 (2023) no. 3, pp. 477-480

Voir la notice de l'article provenant de la source Math-Net.Ru

Keywords: generalized derivative, Jackson inequality, best approximation, direct theorem of approximation theory. 
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N. V. Laktionova; K. V. Runovskii. Direct Theorems on Approximation of Periodic Functions with High Generalized Smoothness. Matematičeskie zametki, Tome 113 (2023) no. 3, pp. 477-480. http://geodesic.mathdoc.fr/item/MZM_2023_113_3_a15/