TY - JOUR AU - V. V. Zhuk TI - A modification of the concept of modulus of smoothness and its application to the estimation of Fourier coefficients JO - Doklady Akademii Nauk PY - 1965 SP - 758 EP - 761 VL - 160 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1965_160_4_a4/ LA - ru ID - DAN_1965_160_4_a4 ER -