Ray Optics, Fermat's Principle, and Application to General Relativity (Lecture Notes in Physics, New Series m Vol.61) (2000. X, 200 p. 23,5 cm)

From Maxwell's equations to ray optics.- to Part I.- Light propagation in linear dielectric and permeable media.- Light propagation in other kinds of media.- A mathematical framework for ray optics.- to Part II.- Ray-optical structures on arbitrary manifolds.- Ray-optical structures on Lorentzian manifolds.- Variational principles for rays.- Applications.