In the networks and controlling fields of engineering , many problems can be described as solving a system of linear algebraic equations ax - f , whose matrix of coefficients is large tridiagonal blocked matrix . the usual method of solving this kind of equations is the iterative method 在工程領(lǐng)域,如網(wǎng)絡(luò)、控制等方面,許多實(shí)際問題都可歸結(jié)為解一個(gè)系數(shù)矩陣a為大型分塊三對角矩陣的線性方程組ax = f這類方程組通常使用迭代方法求解。