Opposite angles-dominant matrix 基本例句 对角占优矩阵 This paper gives the concept and properties of interval diagonally dominant matrices, then the sufficient and necessary condition for interval dominant matrices is discussed.摘要引入区间对角占优矩阵的定义，讨论了区间对角占优矩阵的性质，给出了区间对角占优矩阵的判定方法。