在M是α-严格对角占优矩阵下估计迭代矩阵M-1N谱半径上界,通过计算| λ(M-1N)|需满足的条件得出了p(A-1),p(J)的估计,并用数值算例说明了这些结论的有效性.%The upper bound for spectral radius of iterative matrix M-1 N is estimated when M is an α- diag-nally dominant matrix. The esimations of p(A-1) and ρ(J) are obtained by calculating sufficient conditions for | λ(.M-1N) | ,and the numerical example illustrates the effectiveness of the criteria.
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