%0 Journal Article %A V. Yu. Popov %T Exact Jackson–Stechkin inequality in the space $L_2$ on hyperboloid %J Trudy Instituta matematiki i mehaniki %D 1998 %P 254-266 %V 5 %U http://geodesic.mathdoc.fr/item/TIMM_1998_5_a18/ %G ru %F TIMM_1998_5_a18