TY - JOUR AU - S. B. Vakarchuk TI - Generalized Smoothness Characteristics in Jackson-Type Inequalities and Widths of Classes of Functions in~$L_2$ JO - Matematičeskie zametki PY - 2015 SP - 511 EP - 529 VL - 98 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2015_98_4_a2/ LA - ru ID - MZM_2015_98_4_a2 ER -