摘要
本文研究了自治的ｎ维一阶常微分方程组的周期解的存在性问题，并给出了自治方程的一个新的周期解存在定理，改进了Ｂ．Ａ．плиСС的结果。
This article is to discuss the existential possibility of the periodic solution of the autonomous n-dimensional first order system of ordinary differential equations was discussed and a new existence theory of the autonomous equation's periodic solution was advanced,thus B.A.п л и С С result was further improved.
关键词
周期解
存在性
微分方程
自治方程
autonomous differential equation
periodic solution
existential possibility
