程序要求输入一个3*3的矩阵，然后可以将此矩阵进行LDU分解-Procedures for the importation of a 3* 3 matrix, this matrix can then LDU decomposition

实对称正定矩阵LDL^分解，其中L为单位下三角矩阵，D为对角阵-A recursive algorithm for calculating the eigenvalues of a real symmetric matrix based on LDLT decomposition is given. With this algorithm, the number of eigenvalues of a real symmetric matrix in the given interval c

代码基于《用C++语言编写数学常用算法》/陈必红著。源码中定义了多种矩阵初始化函数，可以讲数组，文本文件等直接转换为矩阵。除了常用的矩阵运算分解等操作，增加了常用的矩阵点乘，叉乘，矩阵块移除等常用操作，在源文件中有详细注释。-Code based on the " write mathematical language commonly used algorithm C++" /Chen Hung forward. Defined in a variety of matrix s

利用奇异值分解求一般实矩阵A的广义逆矩阵A+-Using singular value decomposition (general real matrix A of the generalized inverse matrix A+