Nonlinear Analysis and Optimization : Proceedings of the International Conference held in Bologna Italy May 3–7 1982 On the contributions of lamberto cesari to applied mathematics Applied mathematics and scientific thought Nash point equilibria for variational integrals Nonlinear optimization Behaviour of solutions of nonlinear alternative problems under perturbations of the linear part with rank change On a property of orlicz sobolev spaces Another approach to elliptic eigenvalue problems with respect to indefinite weight functions Some results on minimal surfaces with free boundaries Relaxation methods in nonlinear problems Waves in weakly coupled parabolic systems Variational methods and boundary value problems for vector second order differential equations and applications to the pendulum equation Stabilite de Regime des Machines Tournantes et Problemes Associes.