Geodesic
Quadratic phases of differential equations $y''=q(t)y$
Archivum mathematicum, Tome 08 (1972) no. 2, pp. 63-78.

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

Classification : 34A25, 34C10 
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     author = {Barv{\'\i}nek, Erich},
     title = {Quadratic phases of differential equations $y''=q(t)y$},
     journal = {Archivum mathematicum},
     pages = {63--78},
     publisher = {mathdoc},
     volume = {08},
     number = {2},
     year = {1972},
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     zbl = {0283.34011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1972__8_2_a0/}
}
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Barvínek, Erich. Quadratic phases of differential equations $y''=q(t)y$. Archivum mathematicum, Tome 08 (1972) no. 2, pp. 63-78. http://geodesic.mathdoc.fr/item/ARM_1972__8_2_a0/