A Fermat principle for stationary space-times and applications to light rays☆
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Morse theory of causal geodesics in a stationary spacetime via Morse theory of geodesics of a Finsler metric
2010, Annales de l'Institut Henri Poincare (C) Analyse Non LineaireLightlike rays in stationary spacetimes with critical growth
2008, Nonlinear Analysis, Theory, Methods and ApplicationsCitation Excerpt :Fermat Principle Its proof is in [8, Theorem 2.3] (and also in [11, Theorem 6.2.2]). As they are useful in the following, we outline its main tools.
Global hyperbolicity and Palais-Smale condition for action functionals in stationary spacetimes
2008, Advances in MathematicsGeodesics in stationary spacetimes and classical Lagrangian systems
2007, Journal of Differential EquationsNormal geodesics in stationary Lorentzian manifolds with unbounded coefficients
2002, Journal of Geometry and PhysicsAn intrinsic Fermat principle on stationary Lorentzian manifolds and applications
2002, Differential Geometry and its Application
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Work supported by the Ministry of University and Scientific and Technological Research (40%–60%, 1991).
Copyright © 1995 Published by Elsevier B.V.