矩阵运算源码最新版本，支持矩阵乘法、转置求逆，特征值特征向量等操作。-Source the latest version of matrix operations in support of matrix multiplication, transpose inverse, eigenvalue eigenvector and so on.

c++的数学库，最新版本是mtl4，可以方便的计算矩阵等数学问题-c++ math library, the latest version is mtl4, can facilitate the calculation of matrix, such as a mathematical problem