On nonoscillatory linear differential equations of second order

On nonoscillatory linear differential equations of second order
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Proc. Amer. Math. Soc. 64 (1977), 251-259

DOI: https://doi.org/10.1090/S0002-9939-1977-0463565-7

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For the equation $y'' + q(t)y = 0$, we derive necessary conditions for nonoscillation in terms of “general means” of $Q(t) = \smallint _0^tq ds$.

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