@inbook{ff664dcba4014b408906e1e95b8aca92,
title = "Variational methods with application to one-dimensional boundary value problems and numerical evaluations",
abstract = "A Lagrangian system is considered, under one-sided growth conditions on the Lagrangian function. The existence of a critical point of mountain pass type is proved. An application to light rays is shown, with some numerical evaluations.",
keywords = "Fermat's principle, Lagrangian systems, variational methods, Fermat's principle, Lagrangian systems, variational methods",
author = "Marco Degiovanni",
year = "2022",
doi = "10.1007/978-3-031-05321-4_4",
language = "English",
isbn = "978-3-031-05320-7",
volume = "2308",
series = "LECTURE NOTES IN MATHEMATICS",
pages = "85--123",
editor = "Massimo Chiappini and Vincenzo Vespri",
booktitle = "Applied mathematical problems in geophysics",
}