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Integral estimates for null Lagrangians. (English) Zbl 0793.58002
Author’s abstract: “Sobolev spaces of differential forms are studied. L p -projections onto exact forms are introduced as a tool to obtain integral estimates for null Lagrangians. New results on compensated compactness are given and mean-coercive variational integrals are found”.

58A10Differential forms (global analysis)
46E35Sobolev spaces and other spaces of “smooth” functions, embedding theorems, trace theorems
58E15Applications of variational methods to extremal problems in several variables; Yang-Mills functionals
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