弱链对角占优矩阵的‖A^(-1)‖_∞的新界

The new bound of ‖A^(-1)‖_∞ for weakly chained dominant matrices

对弱链对角占优矩阵A的主子矩阵的逆矩阵,A,A-1的元素的关系式应用新给出的A-1元素的上界估计式并进行放缩,得到了‖A-1‖∞上界新的提高的只与A的元素有关的估计式.

For the inverse matrix of the principal submatrix in the weakly chained dominant matrix A, the paper gives the upper bounds of A^-1 in the relation between A and A^-1, and concludes that the improvement of the upper bound of ‖A^-1 ‖∞ is related only to the elements of A formula.