一阶中立型微分差分方程振动性的充分必要条件

A Necessary and Sufficient Condition for Oscillation of First Order Neutral Differential Equations

证明了一类具有周期系数的中立型微分差分方程振动的充分必要条件是其相应的特征方程无实根 .

In this paper, we prove that all solutions of a certain class of neutral differential equations with periodic coefficients oscillate if and only if their characteristic equations have no real roots.