Remarks on the space of volume preserving embeddings
  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. 
Mathieu Molitor
math.DG