摘要：This paper deals with oscillation criteria for even order nonlinear neutral mixed type differential equations of the form ? a(t)(x(t) + bx(t − τ 1 ) + cx(t + τ 2 )) (n−1) ? ′ +p(t)x α (t−σ 1 )+q(t)x β (t+σ 2 ) = 0, where t ≥ t 0 and n ≥ 2 is an even integer, α ≥ 1 and β ≥ 1, are ratios of odd positive integers. The results are obtained both for the case ∞ R a −1 (t)dt = ∞, and in case ∞ R a −1 (t)dt < ∞. Some examples are given to illustrate our main results.
