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Oscillations of differential equation with retarded argument. (English) Zbl 0584.34047
The author gives several sufficient conditions for the oscillation of bounded solutions of \[ (r(t)y'(t))'+p(t)f(y(\rho_ 1(t)))h(y'(\rho_ 2(t)))=0. \] There is one theorem which guarantees the oscillation of all solutions.
Reviewer: E.Heil
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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