TY - JOUR AU - A. Ioffe TI - Typical Convexity (Concavity) of Dini-Hadamard Upper (Lower) Directional Derivatives of Functions on Separable Banach Spaces JO - Journal of convex analysis PY - 2010 SP - 1019 EP - 1032 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JCA_2010_17_3_JCA_2010_17_3_a17/ ID - JCA_2010_17_3_JCA_2010_17_3_a17 ER -