用乔里斯基分解法(即平方根法)求解系数矩阵为对称正定、且右端具有多组常数向量的线性代数方程组AX=D-Using Cholesky decomposition method (ie, square root method) for solving the coefficient matrix is ​ ​ symmetric positive definite, and the right end of the constant vector with multiple groups of linear algebraic equations AX = D