On Completeness of Groups of Diffeomorphisms

Abstract : We study completeness properties of the Sobolev diffeomorphism groups Ds(M) endowed with strong right-invariant Riemannian metrics when the underlying manifold M is ℝd or compact without boundary. The main result is that for dim M/2 + 1, the group Ds (M) is geodesically and metrically complete with a surjective exponential map. We also extend the result to its closed subgroups, in particular the group of volume preserving diffeomorphisms and the group of symplectomorphisms. We then present the connection between the Sobolev diffeomorphism group and the large deformation matching framework in order to apply our results to diffeomorphic image matching.
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Submitted on : Monday, June 13, 2016 - 11:47:56 AM
Last modification on : Sunday, January 20, 2019 - 1:16:01 PM

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Martins Bruveris, François-Xavier Vialard. On Completeness of Groups of Diffeomorphisms. 2016. ⟨hal-01253261⟩

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