## Oscillation criteria for certain forced second-order nonlinear differential equations with delayed argument.(English)Zbl 1093.34552

From the summary: Some new sufficient conditions for oscillation criteria are given for forced second-order nonlinear differential equations with delayed argument in the form $x''(t)+q(t)f(x(\tau(t)))= e(t).$ The results are based on the information only on a sequence of subintervals of $$[t_0,\infty)$$ rather than on the whole half-line.

### MSC:

 34K11 Oscillation theory of functional-differential equations
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### References:

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