Generalized de la Vallée Poussin Disconjugacy Tests for Linear Differential Equations(1)
Canadian mathematical bulletin, Tome 14 (1971) no. 3, pp. 419-428

Voir la notice de l'article provenant de la source Cambridge University Press

In this paper, we study the oscillatory behavior of the solutions of the linear differential equation (1.1) where (1.2) and all functions are assumed to be continuous on a bounded interval [a, b). An «th-order linear equation is said to be disconjugate on an interval I provided it has no nontrivial solution with more than n — 1 zeros, counting multiplicities, in I.
Willett, D. Generalized de la Vallée Poussin Disconjugacy Tests for Linear Differential Equations(1). Canadian mathematical bulletin, Tome 14 (1971) no. 3, pp. 419-428. doi: 10.4153/CMB-1971-073-3
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