TY - JOUR AU - R. A. Raitsin TI - On the best mean-square approximation, by polynomials and entire functions of exponential type, to functions with a~logarithmic singular point JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 185 EP - 186 VL - 180 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1987_180_a111/ LA - ru ID - TM_1987_180_a111 ER -