Estimate for the spectral radius of iterative matrices.

迭代矩阵的谱半径估计。

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Conclusion Norm of operator is very important to estimate the spectral radius of operator.

结论算子范数对于估计有界线性算子乘积与和的谱半径是至关重要的。

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Using matrix theory, we present a sharp upper bound on the spectral radius of digraphs and strongly connected diagraphs.

首先，我们给出一些图的邻接谱半径的一些新的可达上界，并说明这些新结果在一定情形下比已有的结果要好。

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