MATHEMATICS

The dynamic Fermat and Huygens principles for a second-order scalar three-dimensional equation of general type

É. V. Nikol'skii

Institute of Geology, Geophysics and Mineralogy, Siberian Branch of the USSR Academy of Sciences, Novosibirsk

UDC: 517.94

Presented: M. M. Lavrent'ev
Received: 03.09.1984

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