TY - JOUR AU - N. A. Il'yasov TI - On the equivalence of some inequalities in the theory of approximation of periodic functions in the spaces $L_p(\mathbb T),1 < p < \infty$ JO - Trudy Instituta matematiki i mehaniki PY - 2018 SP - 93 EP - 106 VL - 24 IS - 2 UR - http://geodesic.mathdoc.fr/item/TIMM_2018_24_2_a9/ LA - ru ID - TIMM_2018_24_2_a9 ER -