Nonoscillation and disconjugacy in the complex domain

Beesack, Paul R.

doi:10.1090/S0002-9947-1956-0082009-1

Nonoscillation and disconjugacy in the complex domain
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by Paul R. Beesack

Trans. Amer. Math. Soc. 81 (1956), 211-242

DOI: https://doi.org/10.1090/S0002-9947-1956-0082009-1

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A criterion for non-oscillatory differential equations