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Oscillation behavior of even-order nonlinear neutral differential equations with variable coefficients. (English) Zbl 1189.34135
Summary: Some sufficient conditions are obtained for the oscillation of all solutions of even-order nonlinear neutral differential equations with variable coefficients. Our results improve and generalize known results. In particular, the results are new even when $n=2$.
##### MSC:
 34K11 Oscillation theory of functional-differential equations 34K40 Neutral functional-differential equations
##### References:
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