对严格对角占优M-矩阵A的最小特征值τ(A)经典的下界估计式应用该类矩阵逆矩阵A-1元素的上界新的提高的估计式1/aii≤αii≤1/aii+∑j≠1aiipji与1/aii≤αii≤1/aii+∑j≠1aiinji,i∈n,得到τ(A)新的提高的且易于计算的界.
The improved and easily - calculated τ(A)is obtained by treating the classical lower bound of minimum eigenvalue τ (A) of strictly diagonally dominant M - matrix and applying the new improved estimator of the elements(1/aii≤αii≤1/aii+∑j≠1aiipji,1/aii≤αii≤1/aii+∑j≠1aijnji,)for the inverse matrix A^-1.