TY - JOUR AU - A. G. Babenko AU - Yu. V. Kryakin AU - V. A. Yudin TI - One-sided approximation in~$L$ of the characteristic function of an interval by trigonometric polynomials JO - Trudy Instituta matematiki i mehaniki PY - 2012 SP - 82 EP - 95 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2012_18_1_a6/ LA - ru ID - TIMM_2012_18_1_a6 ER -