Riemannian geometry of the space of volume preserving immersions

Abstract

Given a compact manifold $M$ and a Riemannian manifold $N$ of bounded geometry, we consider the manifold $\mathrm{Imm}(M,N)$ of immersions from $M$ to $N$ and its subset ${\mathrm{Imm}}_{\mu }(M,N)$ of those immersions with the property that the volume-form of the pull-back metric equals $\mu$. We first show that the non-minimal elements of ${\mathrm{Imm}}_{\mu }(M,N)$ form a splitting submanifold. On this submanifold we consider the Levi-Civita connection for various natural Sobolev metrics write down the geodesic equation and show local well-posedness in many cases. The question is a natural generalization of the corresponding well-posedness question for the group of volume-preserving diffeomorphisms, which is of great importance in fluid mechanics.

arXiv comment22 pages, no figure

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