Presymplectic Geometry and Fermat's Principle for anisotropic media
arXiv:hep-th/9602037 · doi:10.1088/0305-4470/29/8/017
Abstract
The tools of presymplectic geometry are used to study light rays trajectories in anisotropic media.
LaTeX file, no figures. To appear in J. Phys. A: Math. and Gen