Herings, P. Jean-Jacques; Koshevoy, Gleb A.; Talman, Dolf; … - 2003
Let X be a non-empty, compact, convex set in R and o an upper semi-continuous mapping from X to the collection of non-empty, compact, convex subsets of R;. It is well known that such a mapping has a stationary point on X, i.e. there exists a point in X satisfying that its image under o has a...