Laan, Gerard van der; Talman, Dolf; Yang, Zaifu - Tinbergen Instituut - 2002
the Euclidean space of which X is a subset has at least one stationary point, being a point in X at which the image fi …(x) has a nonempty intersection with the normal cone at x. In many circumstances there may be more than one stationary point …. In this paper we refine the concept of stationary point by perturbing simultaneously both the set X and the solution …