BRECKNER Wolfgang W. RATIONAL S-CONVEXITY – A GENERALIZED JENSEN-CONVEXITY     MATEMATICĂ, INFORMATICĂ       978-973-595-325-6   2012     DISPONIBIL LA CERERE   buc.
REZUMAT: The book presents an up-to-date review of rationally s-convex mappings, and it originates from the paper of W. W. Breckner and G. Orban, Continuity properties of rationally s-convex mappings with values in an ordered topological linear space.