%0 Journal Article %A N. P. Korneichuk %T Best Approximation and Symmetric Decreasing Rearrangements of Functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2001 %P 179-193 %V 232 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2001_232_a15/ %G ru %F TM_2001_232_a15