作为所得理论结果的某些应用，文中还研究了极大化问题与微分方程组的非零周期解等问题。

For the application of some general theories obtained in the paper, the problems on the maximization and the non-zero periodic solutions for a system of differential equations are also studied.

youdao

作为所得理论结果的某些应用，文中还研究了极大化问题与微分方程组的非零周期解等问题。

For the application of some general theories obtained in the paper, the problems on the maximization and the non-zero periodic solutions for a system of differential equations are also studied.

youdao