Fermat Metrics
نویسندگان
چکیده
In this paper we present a survey of Fermat metrics and their applications to stationary spacetimes. A principle for light rays is stated in class spacetimes variational theory the description multiple image effect. Some results on methods, as Ljusternik-Schnirelmann Morse Theory are recalled, give methods used. Other concern global hyperbolicity geodesic connectedeness characterization Sagnac effect spacetime. Finally some possible other considered.
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ژورنال
عنوان ژورنال: Symmetry
سال: 2021
ISSN: ['0865-4824', '2226-1877']
DOI: https://doi.org/10.3390/sym13081422