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

矩阵运算：列举常用矩阵计算的算法（矩阵求逆，转置，求实对称矩阵，奇异值矩阵等等）-Matrix operations: List of common matrix calculation algorithm (matrix inverse, transpose, realistic symmetric matrix, singular value matrix, etc.)