Distinguish center and focus for plane differential system

Distinguish center and focus for plane differential system 背景 对于一个平面光滑微分系统 \[\begin{equation} \dot{x}=f(x,y),~~~ \dot{y}=g(x,y). \end{equation} \]假设 \
posted @ 2024-01-04 19:08  枫叶之影  阅读(13)  评论(0)  编辑  收藏  举报