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On oscillation criteria for a forced neutral differential equation. (English) Zbl 0961.34059
From the authors’ abstract: Necessary and sufficient conditions are obtained so that every solution to \[ [y(t)- py(t-\tau)]'+ Q(t) G(y(t- \sigma))= f(t)\tag{\(*\)} \] is oscillatory or tends to zero as \(t\to\infty\) for \(0\leq p<1\) or \(p< 0\) but \(\neq -1\). For \(p>1\), necessary and sufficient conditions are obtained so that every bounded solution to \((*)\) is oscillatory or tends to zero as \(t\to\infty\).
Reviewer: W.M.Oliva (Lisboa)

MSC:
34K11 Oscillation theory of functional-differential equations
34K40 Neutral functional-differential equations
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