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On a Fermat principle in general relativity. A Ljusternik-Schnirelmann theory for light rays
Fabio Giannoni, Antonio MasielloVolume:
174
Year:
1998
Language:
english
Pages:
47
Journal:
Annali di Matematica Pura ed Applicata
DOI:
10.1007/bf01759371
File:
PDF, 2.10 MB
english, 1998