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Oscillation and asymptotic behavior of neutral equations with variable coefficients. (English) Zbl 0617.34067

The authors discuss the delay equation \([y(t)+P(t)y(t- \tau)]^{\bullet}+Q(t)y(t-\sigma)=0.\) The asymptotic properties of nonoscillatory solutions are studied and sufficient conditions are given to insure that all solutions are oscillatory. Many examples are given.
Reviewer: E.Heil

MSC:

34K99 Functional-differential equations (including equations with delayed, advanced or state-dependent argument)
34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations
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