Relationship between volume and energy of vector fields
β Scribed by Olga Gil-Medrano
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 127 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0926-2245
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β¦ Synopsis
A unified study of energy and volume functionals is presented here by determining the critical points of a functional that extends simultaneously energy and volume and that is defined on the product of the manifold of smooth maps C β (M, N ) times the manifold M of riemannian metrics on M. The restriction of this functional to different submanifolds of the space of vector fields X(M) Γ M is also considered, and used to study several functionals generalizing volume and energy or total bending of vector fields.
π SIMILAR VOLUMES
We study the stability and instability of harmonic and minimal unit vector fields and the existence of absolute minima for the energy and volume functional on three-dimensional compact manifolds, in particular on compact quotients of unimodular Lie groups.
We prove lower bounds for the Dirichlet energy of a unit vector field defined in a perforated domain of R 2 with nonzero degree on the outer boundary in terms of the total diameter of the holes. We use this to derive lower bounds, and then compactness results for sequences (u = ) of minimizers or al