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Conditions for strict inequality in comparisons of spectral radii of splittings of different matrices

机译:比较不同矩阵分裂谱半径的严格不等式的条件

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We present new comparison theorems for the spectral radii of matrices arising from splittings of different matrices under nonnegativity assumptions. Our focus is on establishing strict inequalities of the spectral radii without imposing strict inequalities of the matrices, but we also obtain new results for nonstrict inequalities of the spectral radii. We emphasize two different approaches, one combinatorial and the other analytic and discuss their merits in the light of the results obtained. We try to get fairly general results and indicate by counter-examples that some of our hypotheses cannot be relaxed in certain directions. (C) 2001 Elsevier Science Inc. All rights reserved. [References: 17]
机译:我们提出了在非负性假设下,由不同矩阵分裂产生的矩阵谱半径的新比较定理。我们的重点是建立严格的光谱半径不等式而不强加矩阵的严格不等式,但是我们也获得了光谱半径非严格不等式的新结果。我们强调两种不同的方法,一种是组合方法,另一种是分析方法,并根据获得的结果讨论它们的优点。我们试图获得相当普遍的结果,并通过反例表明我们的某些假设无法在某些方向上放松。 (C)2001 Elsevier Science Inc.保留所有权利。 [参考:17]

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