%0 Journal Article %A E. E. Berdysheva %T Optimal Set of the Modulus of Continuity in the Sharp Jackson Inequality in the Space $L_2$ %J Matematičeskie zametki %D 2004 %P 666-674 %V 76 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2004_76_5_a2/ %G ru %F MZM_2004_76_5_a2