%0 Journal Article %A N. Ya. Yatsenko %T On the approximation of even and odd bounded $2\pi$-periodic functions by trigonometric polynomials of best uniform approximation at a~given system of points %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 238-239 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a147/ %G ru %F TM_1987_180_a147