讨论一类具分布时滞的微分方程正周期解问题.利用锥不动点定理,获得了这类问题正解存在性和多重性的充分条件,推广和改进了已有文献的相关结果。
The positive periodic solutions was discussed for a class of differential equation with distributed delay. Some sufficient conditions for the existence and multiplicity solutions of positive periodic solutions were obtained by using the fixed point theorem. The results have extended and improved the related reports in the literatures.