本文研究一类不稳定型二阶中立型微分方程正解的存在性与有界振动。

In this paper, we study the existence of positive solutions and the bounded oscillation of a class of second order unstable type neutral differential equations.

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本文研究了既有滞后量又有超前量的一阶中立型常系数微分方程的振动性，得到了其振动的几个充分条件。

In this paper, we have studied the oscillation of the first order neutral functional differential equations with delay and advanced argument, obtained, some sufficient conditions extended and impoved.

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研究了一类具有多个变滞量的变系数的二阶中立型差分方程的解的振动性，得到了该类方程振动及其解的一阶差分振动的充分条件。

The oscillation problem for a class of the second order neutral difference equations with several variable delay arguments and variable coefficients was studied.

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