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Oscillation of second-order linear delay differential equations. (English) Zbl 1153.34344

Summary: The aim of this paper is to derive sufficient conditions for the linear delay differential equation
\[ (r(t)y'(t))' + p (t)y(\tau (t)) = 0 \]
to be oscillatory by using a generalization of the Lagrange mean-value theorem, the Riccati differential inequality and the Sturm comparison theorem.

MSC:

34K11 Oscillation theory of functional-differential equations
34K06 Linear functional-differential equations
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References:

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