研究奇数阶混合中立型微分方程 [x(t)+ax(t-τ)-bx(t+σ)]^(n)+δ(qx(t-g)+px(t+h))=0其中a,b,q,p,τ,σ,g,h为正常数,δ=±1,n为奇数.得到方程若干新的振动定理,改进和推广了文[1]中的结果.
We shall consider a class of odd order mixed neutral differential equations. [x(t)+ax(t-τ)-bx(t+σ)]^(n)+δ(qx(t-g)+px(t+h))=0 where a,b,q,p,τ,σ,g,hare positive constant numbers, δ= + 1,n≥1 is odd integer number. Some new oscillations criteria of the solutions are obtained. This obtained result generalizes and improves some results of [1].