Mathematical Theories of Optimization : Proceedings of the International Conference Held in S. Margherita Ligure (Genova) November 30 – December 4 1981 A convergence for bivariate functions aimed at the convergence of saddle values Optimal feedback controls for semilinear parabolic equations On the production smoothing problem Existence of solutions and existence of optimal solutions Dual variational methods in non convex optimization and differential equations  — Convergence and calculus of variations The approximate first order and second order directional derivatives for a convex function New applications of nonsmooth analysis to nonsmooth optimization Controle optimal de systemes a etats multiples A relation between existence of minima for non convex integrals and uniqueness for non strictly convex integrals of the calculus of variations Remarks on pathwise nonlinear filtering Boundary solutions of differential inclusion On the compactness of minimizing sequences of variational problems A formula for the level sets of epi limits and some applications.