Geodesic
On oscillatory solutions of fourth order ordinary differential equations
Czechoslovak Mathematical Journal, Tome 49 (1999) no. 4, pp. 779-790 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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The paper deals with the oscillation of a differential equation $L_4y+P(t)L_2y+Q(t)y\equiv 0$ as well as with the structure of its fundamental system of solutions.
The paper deals with the oscillation of a differential equation $L_4y+P(t)L_2y+Q(t)y\equiv 0$ as well as with the structure of its fundamental system of solutions.
Classification : 34A25, 34A30, 34C10, 34D05
Keywords: linear differential equation; quasi-derivative; monotone solution; Kneser solution; oscillatory solution 
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Palumbíny, Oleg. On oscillatory solutions of fourth order ordinary differential equations. Czechoslovak Mathematical Journal, Tome 49 (1999) no. 4, pp. 779-790. http://geodesic.mathdoc.fr/item/CMJ_1999_49_4_a8/

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