On Fermat's principle in general relativity. I. The general case
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Publication:3488842
DOI10.1088/0264-9381/7/8/011zbMath0707.53054OpenAlexW2045163500WikidataQ62005996 ScholiaQ62005996MaRDI QIDQ3488842
Publication date: 1990
Published in: Classical and Quantum Gravity (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1088/0264-9381/7/8/011
Applications of global differential geometry to the sciences (53C80) Electromagnetic fields in general relativity and gravitational theory (83C50)
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