全文下载:2013030325
李华
(河南城建学院 数理系, 河南 平顶山 467044)
摘要: 给出两个非负矩阵Hadamard积谱半径上界的一个新估计式和两个非奇异 M矩阵的Fan积的最小特征值下界的新估计, 估计式依赖矩阵的元素, 易于计算。 并通过具体例子加以比较, 表明所得的结果在一定条件下更为精确。
关键词: 非负矩阵; Hadamard积; 谱半径;M矩阵; Fan积; 最小特征值
中图分类号: O 151.21 文献标志码: A
Some Inequalities for the Hadamard Product and the Fan Product of Matrices
LI Hua
(Department of Mathematics and Physics, Henan University of Urban Construction, Pingdingshan 467044,China)
Abstract: A new upper bound of spectral radius of Hadamard product for two nonnegative matrices, and a new lower bound of the minimum eigenvalue of Fan product for two nonsingular M-matrices are given, the estimations are easier to calculate since they only depend on the entries of matrices, Finally, example is given to show that the bounds are better than the prevous results.
Key words: nonnegative matrices; Hadamard product; spectral radius; M-matrices; Fan product; the minimum eigenvalue
收稿日期: 2012-06-19
基金项目: 河南省科技计划项目(112400450212); 河南省教育厅自然科学研究项目(2011A110002).
作者简介: 李华(1978—), 女, 讲师.