lansvd分解算法，先对矩阵进行lanczos分解，再进行svd奇异值分解。代码里面含有注释。-lansvd decomposition algorithm, first lanczos the matrix decomposition, then svd singular value decomposition. Code which contains comments.

PROPACK中的奇异值算法，先上对角化，载用隐式QR迭代进行分解-PROPACK singular value decomposition, the first on the diagonal, contained implicit iteration QR decomposition

Lazsvd矩阵的SVD分解，MATLAB程序。(SVD decomposition of Lazsvd matrix)