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Oscillation and nonoscillation theorems for second order functional differential equations. (English) Zbl 0279.34024


MSC:

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

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[11] Staikos, V. A.; Petsoules, A. G., Some oscillation criteria for second order nonlinear delay-differential equations, J. Math. Anal. Appl., 30, 695-701 (1970) · Zbl 0193.06303
[12] H. TeufelPacific J. Math.; H. TeufelPacific J. Math. · Zbl 0236.34062
[13] Travis, C. C., Oscillation theorems for second-order differential equations with functional arguments, (Proc. Amer. Math. Soc., 31 (1972)), 199-202 · Zbl 0235.34141
[14] Waltman, P., A note on an oscillation criteria for an equation with a functional argument, Canad. Math. Bull., 11, 593-595 (1968) · Zbl 0186.42205
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[16] Wong, J. S.W, Second order oscillation with retarded arguments, (1971 Naval Research Laboratory—Mathematics Research Center Conference (1972), Academic Press: Academic Press New York/London), 581-596
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