Frenk, J.B.G. - Erasmus Research Institute of Management (ERIM), ERIM … - 2005
In this technical note we give a short proof based on standard results in convex analysis of some important characterization results listed in Theorem 3 and 4 of [1]. Actually our result is slightly general since we do not specify the convex set X. For clarity we use the same notation for the...
