求解logistic映射的李雅普诺夫指数，来判断该序列是否为混沌-Solving logistic mapping Lyapunov exponent, to determine whether the sequence of Chaos

通过绘制李亚普洛夫指数图，来观察logistic映射的周期倍增规律。

此文件包含了洛伦兹系统的庞加莱截面图，李雅普诺夫指数图的源代码，也有Logistic映射的分叉图，代码可以运行。(This file contains the poincare cross section diagram of lorentz system, the source code of lyapunov exponent diagram, and the bifurcation diagram of Logistic mapping. The code can be run.)