一個n×n階矩陣A=(αij),如果其每一行的非對角元的模之和都小於這一行的對角元的模,即
![](/img3/3669.gif)
![](/img3/3670.gif)
![](/img3/3671.gif)
參考書目
R.S.瓦格著,蔣爾雄等譯:《矩陣迭代分析》,上海科學技術出版社,上海,1966。(R.S.Varga,Matrix Iterative Analysis,Prentice-Hall,Englewood Cliffs,New Jersey,1962.)
D.M.Young,Iterative Solution of large Linear Systems,Academic Press,New York,1971.