A study of the waves and boundary layers due to a surface pressure on a uniform stream of a slightly viscous liquid of finite depth.
We study integrals of the form , where , is continuous and is a -form. We introduce the appropriate notions of convexity, namely ext. one convexity, ext. quasiconvexity and ext. polyconvexity. We study their relations, give several examples and counterexamples. We finally conclude with an application to a minimization problem.
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