Frenk, Frenk, J.B.G.; Kassay, G. - Erasmus Research Institute of Management (ERIM), … - 2004
In this paper we discuss the level set method of Joó and how to use it to give an elementary proof of the well-known Sion’s minimax result. Although this proof technique is initiated by Joó and based on the inter-section of upper level sets and a clever use of the topological notion of...