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当前路径:Classes/PHPExcel/Shared/JAMA/CholeskyDecomposition.php
<?php
/**
 *    @package JAMA
 *
 *    Cholesky decomposition class
 *
 *    For a symmetric, positive definite matrix A, the Cholesky decomposition
 *    is an lower triangular matrix L so that A = L*L'.
 *
 *    If the matrix is not symmetric or positive definite, the constructor
 *    returns a partial decomposition and sets an internal flag that may
 *    be queried by the isSPD() method.
 *
 *    @author Paul Meagher
 *    @author Michael Bommarito
 *    @version 1.2
 */
class CholeskyDecomposition
{
    /**
     *    Decomposition storage
     *    @var array
     *    @access private
     */
    private $L = array();

    /**
     *    Matrix row and column dimension
     *    @var int
     *    @access private
     */
    private $m;

    /**
     *    Symmetric positive definite flag
     *    @var boolean
     *    @access private
     */
    private $isspd = true;

    /**
     *   ...
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