The even order neutral differential equation (1.1) (equation presented) is considered under the following conditions: n ≥ 2 is even; λ > 0; T > 0; g ∈ C[t0, ∞), limt→∞g(t) = ∞; f ∈ C([t0, ∞) × R), uf(t, u) ≥ 0 for (t, u) ∈ [t0, ∞) × R, and f(t, u) is nondecreasing in u ∈ R for each fixed t ≥ t0. It is shown that equation (1.1) is oscillatory if and only if the non-neutral differential equation (equation presented) is oscillatory.
|ジャーナル||Electronic Journal of Qualitative Theory of Differential Equations|
|出版ステータス||Published - 2000|
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