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