%0 Journal Article %A Rolewicz, Stefan %T How to define "convex functions" on differentiable manifolds %J Discussiones Mathematicae. Differential Inclusions, Control and Optimization %D 2009 %P 7-17 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMDICO_2009_29_1_a0/ %G en %F DMDICO_2009_29_1_a0