%0 Journal Article %A N. P. Korneichuk %T Best Approximation and Symmetric Decreasing Rearrangements of Functions %J Informatics and Automation %D 2001 %P 179-193 %V 232 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2001_232_a15/ %G ru %F TRSPY_2001_232_a15