%0 Journal Article %A A. P. Solodov %T A~sharp lower bound for the sum of a~sine series with convex coefficients %J Sbornik. Mathematics %D 2016 %P 1743-1777 %V 207 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2016_207_12_a6/ %G en %F SM_2016_207_12_a6