摘要
本文引进了局部对角占优矩阵的概念，得到了非奇Ｈ矩阵与Ｍ－矩阵的等价条件与判定准则，改进了文［１］的主要结果．
In this paper, we introduce the concept of locally diagonally dominant matrices and obtain some equivalence conditions and some criteria of nonsingular H matrices and M matrices, these results improve main results in .
