Formes quadratiques et calcul des variations. (French) Zbl 0529.49005


49J45 Methods involving semicontinuity and convergence; relaxation
46A55 Convex sets in topological linear spaces; Choquet theory
54C08 Weak and generalized continuity
26B25 Convexity of real functions of several variables, generalizations
49J20 Existence theories for optimal control problems involving partial differential equations
46A50 Compactness in topological linear spaces; angelic spaces, etc.
49J27 Existence theories for problems in abstract spaces