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TitlePartial Differential Equations and the Calculus of Variations [electronic resource] : Essays in Honor of Ennio De Giorgi / edited by Ferruccio Colombini, Antonio Marino, Luciano Modica, Sergio Spagnolo
ImprintBoston, MA : Birkhรคuser Boston, 1989
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Descript XXII, 519 p. online resource


The Italian school of Mathematical Analysis has long and gloยญ rious traditions. In the last thirty years it owes very much to the scientific pre-eminence of Ennio De Giorgi, Professor of Mathematiยญ cal Analysis at the Scuola Normale Superiore di Pisa. His fundamental theorems in Calculus of Variations, in Minimal Surfaces Theory, in Partial Differential Equations, in Axiomatic Set Theory as well as the fertility of his mind to discover both general mathematical structures and techniques which frame many different problems, and profound and meaningful examples which show the limits of a theory and give origin to new results and theories, makes him an absolute reference point for all Italian mathematicians, and a well-known and valued personage in the international mathematical world. We have been students of Ennio de Giorgi. Now, we are glad to present to him, together with all his collegues, friends and former students, these Essays of Mathematical Analysis written in his honยญ our on the occasion of his sixtieth birthday (February 8th, 1988), with our best wishes and our thanks for all he gave in the past and will give us in the future. We have added to the research papers of this book the text of a conversation with Ennio De Giorgi about the diffusion and the communication of science and, in particular, of Mathematics


An improvement of Cartanโ{128}{153}s test for ordinarity -- A mathematical contribution to Gibbsโ{128}{153}s analysis of fluid phases in equilibrium -- The epi-continuation method for minimization problems. Relation with the degree theory of F.Browder for maximal monotone operators -- Discretization of evolution variational inequalities -- Homogenization for non linear elliptic equations with random highly oscillatory coefficients -- L? and L1 variations on a theme of ? -convergence -- Asymptotics for elliptic equations involving critical growth -- Asymptotic behaviour for Dirichlet problems in domains bounded by thin layers -- Fundamental interior estimates for a class of second order elliptic operators -- ?-Convergence of integral functionals defined on vector-valued functions -- Limits of obstacle problems for the area functional -- Some remarks on the well-posedness of the Cauchy problem in Gevrey spaces -- Approximating measures and rectifiable curves -- A non-uniqueness result for the operators with principal part ?2t + a(t)?2x -- A note on duality and the calculus of variations -- Some results on periodic solutions of Hamilton-Jacobi equations in Hilbert spaces -- Generalized solutions to ordinary differential equations with discontinuous right-hand sides via ?-convergence -- Stationary solutions of nonlinear Schrรถdinger equations with an external magnetic field -- On the touching principle -- Generalized solutions and convex duality in optimal control -- Models of self-descriptive set theories

Mathematics Partial differential equations Calculus of variations Mathematics Partial Differential Equations Calculus of Variations and Optimal Control; Optimization


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