Coisotropic Variational Problems

Details Coisotropic Variational Problems Coisotropic Variational Problems

2003-07-16

arxiv.org/abs/math/0307216v1

Mathematics

Differential Geometry

Scientific paper

In this article we study constrained variational problems in one independent variable defined on the space of integral curves of a Frenet system in a homogeneous space G/H. We prove that if the Lagrangian is G-invariant and coisotropic then the extremal curves can be found by quadratures. Our proof is constructive and relies on the reduction theory for coisotropic optimal control problems. This gives a unified explanation of the integrability of several classical variational problems such as the total squared curvature functional, the projective, conformal and pseudo-conformal arc-length functionals, the Delaunay and the Poincar{\'e} variational problems.

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