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On the concentration-compactness principle. (English) Zbl 0522.49007
Contributions to nonlinear partial differential equations, Proc. int. Meet., Madrid 1981, Res. Notes Math. 89, 225-238 (1983).

49J45 Methods involving semicontinuity and convergence; relaxation
46A50 Compactness in topological linear spaces; angelic spaces, etc.
49J20 Existence theories for optimal control problems involving partial differential equations
46E35 Sobolev spaces and other spaces of “smooth” functions, embedding theorems, trace theorems
35J60 Nonlinear elliptic equations