matlab中用平方根,改进的平方根求解系数矩阵正定的方程的函数是哪个?

问题描述:

matlab中用平方根,改进的平方根求解系数矩阵正定的方程的函数是哪个?

L = ldl(A)[L,D] = ldl(A)[L,D,P] = ldl(A)[L,D,p] = ldl(A,'vector')[U,D,P] = ldl(A,'upper')[U,D,p] = ldl(A,'upper','vector')[L,D,P,S] = ldl(A)[L,D,P,S] = LDL(A,THRESH)[U,D,p,S] = LDL(A,THRESH,'upper','v...这是改进的平方根法,平方根法是什么啊,谢谢