TY - JOUR AU - V. Yu. Popov TI - Exact Jackson--Stechkin inequality in the space $L_2$ on hyperboloid JO - Trudy Instituta matematiki i mehaniki PY - 1998 SP - 254 EP - 266 VL - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_1998_5_a18/ LA - ru ID - TIMM_1998_5_a18 ER -