Remarks on the space of volume preserving embeddings

Details Remarks on the space of volume preserving embeddings Remarks on the space of volume preserving embeddings

2012-04-14

arxiv.org/abs/1204.3155v1

Mathematics

Differential Geometry

Scientific paper

Let (N,g) be a Riemannian manifold. For a compact, connected and oriented submanifold M of N. we define the space of volume preserving embeddings Emb_{\mu}(M,N) as the set of smooth embeddings f:M \rightarrow N such that f*\mu^{f}=\mu, where \mu^{f} (resp. \mu) is the Riemannian volume form on f(M) (resp. M) induced by the ambient metric g (the orientation on f(M) being induced by f). In this article, we use the Nash-Moser inverse function Theorem to show that the set of volume preserving embeddings in Emb_{\mu}(M,N) whose mean curvature is nowhere vanishing forms a tame Fr\'echet manifold, and determine explicitly the Euler-Lagrange equations of a natural class of Lagrangians. As an application, we generalize the Euler equations of an incompressible fluid to the case of an "incompressible membrane" of arbitrary dimension moving in N.

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