Finding of the saddle point for the ease of an ellipses
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 3, Tome 17 (1970), pp. 20-24
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@article{ZNSL_1970_17_a2,
author = {V. M. Babich},
title = {Finding of the saddle point for the ease of an ellipses},
journal = {Zapiski Nauchnykh Seminarov POMI},
pages = {20--24},
publisher = {mathdoc},
volume = {17},
year = {1970},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/ZNSL_1970_17_a2/}
}
V. M. Babich. Finding of the saddle point for the ease of an ellipses. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 3, Tome 17 (1970), pp. 20-24. http://geodesic.mathdoc.fr/item/ZNSL_1970_17_a2/