weidingzhuangtai

代码说明：

  常微分分析稳定与不稳定的规律常常不需要求解微分方程，而可以利用微分方程稳定性理论，直接研究平衡状态的稳定性，这里举出一些例子和源码(Ordinary differential analysis of the stable and unstable law does not usually need to solve differential equations, and can take advantage of the stability theory of differential equations, directly study the stability of the equilibrium state, give some examples and source)