用QR分解来求矩阵的全部特征值 包括：QR分解，矩阵转置，；矩阵求逆，矩阵相乘，最后迭代得出特征值-With QR decomposition to the full matrix eigenvalue include: QR decomposition, matrix transpose, matrix inversion, matrix multiplication, and finally reached eigenvalue iteration

Mapack可用来做矩阵运算 Mapack is a .NET class library for basic linear algebra computations. It supports the following matrix operations and properties: Multiplication, Addition, Subtraction, Determinant, Norm1, Norm2, Frobenius Norm, Infinity Norm, Rank,

数值分析作业：计算特征值和特征矩阵；QR分解