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.