TY - JOUR AU - N. P. Korneichuk TI - Best Approximation and Symmetric Decreasing Rearrangements of Functions JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2001 SP - 179 EP - 193 VL - 232 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_2001_232_a15/ LA - ru ID - TM_2001_232_a15 ER -