Asymptotic behavior of solutions Asymptotic theory Boundary value problems for second-order elliptic equations Calculus of variations and optimal control; optimization Classical differential geometry Critical exponents Differential equations, Partial Differential geometry Elliptic Monge-Ampère equations Elliptic equations and systems Équations aux dérivées partielles Geometry, Differential Géométrie différentielle Global differential geometry Global surface theory (convex surfaces á la A.D. Aleksandrov) Immersions (minimal, prescribed curvature, tight, etc.) Manifolds Minimal surfaces Minimal surfaces, surfaces with prescribed mean curvature Nonlinear elliptic equations Partial differential equations Qualitative properties of solutions Surfaces minimales Théorie asymptotique Variational methods for second-order elliptic equations