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A note on Ladas’ paper: Oscillatory effect of retarded actions. (English) Zbl 0494.34048


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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References:

[1] Kim, W.J, Monotone and oscillatory solutions of y(n) + py = 0, (), 77-82 · Zbl 0376.34020
[2] Ladas, G, Oscillatory effects of retarded actions, J. math. anal. appl., 60, 410-416, (1977) · Zbl 0369.34031
[3] Ladas, G; Lakshmikantham, V; Papadakis, J.S, Oscillations of the higher order retarded differential equations generated by the retarded argument, (), 219-231 · Zbl 0273.34052
[4] Ladas, G; Ladde, G; Papadakis, J.S, Oscillation of functional differential equations generated by delay, J. differential equations, 12, 385-395, (1972) · Zbl 0227.34053
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