Mathematics – Optimization and Control
Scientific paper
2008-10-23
Journal of Mathematical Analysis and Applications, Vol. 364, No. 2 (2010) 324--340
Mathematics
Optimization and Control
41 pages, 3 figues
Scientific paper
A morph between two Riemannian $n$-manifolds is an isotopy between them together with the set of all intermediate manifolds equipped with Riemannian metrics. We propose measures of the distortion produced by some classes of morphs and diffeomorphisms between two isotopic Riemannian $n$-manifolds and, with respect to these classes, prove the existence of minimal distortion morphs and diffeomorphisms. In particular, we consider the class of time-dependent vector fields (on an open subset $\Omega$ of $ \R^{n+1}$ in which the manifolds are embedded) that generate morphs between two manifolds $M$ and $N$ via an evolution equation, define the bending and the morphing distortion energies for these morphs, and prove the existence of minimizers of the corresponding functionals in the set of time-dependent vector fields that generate morphs between $M$ and $N$ and are $L^2$ functions from $[0,1]$ to the Sobolev space $W^{k,2}_0(\Omega,\R^{n+1})$.
Bihun Oksana
Chicone Carmen
Harris Steven G.
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