利用矩阵特征值包含域定理中系数的不同选择,以及非奇异M矩阵A的逆矩阵A-1的元素估计式的不同选择,得到了q(AoA^-1),q(BoA^-1)新的一些下界.这些估计式使得估计q(AoA^-1),q(BoA^-1)下界时的选择更加丰富.
By Using the different options of the coefficient of the matrix eigenvalue inclusion region theorem and different types of estimation of elements of inverse matrix A-1of nonsingular M matrix A,some new lower bounds of the q( A oA^-1),q( B o A^-1),were obtained. These Estimators make the lower bound of choice more abundant of q( Ao A^-1),q( Bo A^-1).