1. ON THE ROCKAFELLAR FUNCTION ASSOCIATED TO A NON-CYCLICALLY MONOTONE MAPPING. Authors: TEODOR PRECUPANU.2. CHARACTERIZATIONS OF HILBERTIAN NORMS INVOLVING THE AREAS OF TRIANGLES IN A SMOOTH SPACE. Authors: TEODOR PRECUPANU.3. A DUAL MAPPING ASSOCIATED TO A CLOSED CONVEX SET AND SOME SUBDIFFERENTIAL PROPERTIES. Authors: GABRIELA APREUTESEI, TEODOR PRECUPANU.