On the spectral radius and the spectral norm of Hadamard products of nonnegative matrices

被引:12
作者
Huang, Zejun [1 ]
机构
[1] E China Normal Univ, Dept Math, Shanghai 200241, Peoples R China
关键词
Hadamard product; Kronecker product; Nonnegative matrix; Spectral radius; Spectral norm; INEQUALITIES;
D O I
10.1016/j.laa.2010.08.038
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We prove the spectral radius inequality rho(A(1) circle A(2) circle ... circle A(k)) <= rho(A(1)A(2) ... A(k)) for nonnegative matrices using the ideas of Horn and Zhang. We obtain the inequality parallel to A circle B parallel to <= rho(A(T)B) for nonnegative matrices, which improves Schur's classical inequality parallel to A circle B parallel to <= parallel to A parallel to parallel to B parallel to, where parallel to . parallel to denotes the spectral norm. We also give counterexamples to two conjectures about the Hadamard product. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:457 / 462
页数:6
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