该文利用重合度理论研究了一类具有分布时滞的高阶中立型泛函微分方程的周期解问题, 得到了周期解存在的简单判别条件.
By employing the coincidence degree theory, the author studies a kind of higher order neutral flmctinal differential equation with distributed delay. Some simple conditiont which guarantee the existence of periodic solutions to the equation are obtained.