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《Numerical Mathematics A Journal of Chinese Universities》 2018-02
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A NEW INFINITY NORM BOUND FOR THE INVERSE OF S-NEKRASOV MATRICES

Gao Lei;Jing Xia;Wang Yaqiang;School of Mathematics and Information Science, Baoji University of Arts and Sciences;  
Based on the range for the infinity norm of inverse matrix of an S-SDD matrix, a new bound for the infinity norm of the inverse of S-Nekrasov matrices,which involves a parameter, is given. It is shown that there exists an optimal value of the parameter such that the new bound is better than the existing results.Numerical examples are given to illustrate the corresponding results.
【Fund】: 国家自然科学基金(31600299);; 陕西省自然科学基础研究计划项目(2017JQ3020);; 陕西省高校科协青年人才托举项目(20160234);; 陕西省教育厅科研计划项目(17JK0040);; 宝鸡文理学院校级重点项目(ZK16050 ZK2017021 ZK2017095)
【CateGory Index】: O151.21
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