运用不动点定理，研究一类具状态依赖时滞的微分方程周期正解的存在性。

By applying a fixed point theorem, the authors study the existence of positive periodic solutions to a class of differential equations with stated-dependent delay.

youdao

运用不动点定理，研究一类具状态依赖时滞的微分方程周期正解的存在性。

By applying a fixed point theorem, the authors study the existence of positive periodic solutions to a class of differential equations with stated-dependent delay.

youdao