Directional derivates in minimax problems(∗)
Rafael Corrêa, Alberto Seeger · Numerical Functional Analysis and Optimization · 1985
We study the existence and a characterization of the directional derivate h′(x0;d) of the function defined on a Hausdorff topological linear space. The function L(x,·,·) defined in the product of two Hausdorff spaces U and V, verifies the saddle value propertie for all (α>0). The results are applied to a function of the kind