J4 ›› 2011, Vol. 49 ›› Issue (02): 218-222.

• 数学 • 上一篇    下一篇

广义严格对角占优矩阵的新判定条件

邰志艳1, 李庆春2   

  1. 1. 吉林医药学院 数学教研室, 吉林 吉林 132013; 2. 北华大学 数学学院, 吉林 吉林 132013
  • 收稿日期:2010-05-06 出版日期:2011-03-26 发布日期:2011-06-14
  • 通讯作者: 李庆春 E-mail:liqingchun01@163.com

New Criteria for Generalized Strictly DiagonllyDominant Matrices

TAI Zhiyan1, LI Qingchun2   

  1. 1. Department of Mathematics, Jilin Medical College, Jilin 132013, Jilin Province, China;2. College of Mathematics, Beihua University, Jilin 132013, Jilin Province, China
  • Received:2010-05-06 Online:2011-03-26 Published:2011-06-14
  • Contact: LI Qingchun E-mail:liqingchun01@163.com

摘要:

应用α-链对角占优矩阵的性质, 结合不等式放缩技巧并采用寻找正对角阵因子的方法给出判定广义严格对角占优矩阵的一些新的充分条件, 推广和改进了已有对广义严格对角占优矩阵的判定方法, 并用数值算例证明了结果的优越性.

关键词: 对角占优矩阵; α-链对角占优矩阵; 非零元素链; 正对角矩阵

Abstract:

Based on the properties of α-chain diagonlly dominant matrices, several new sufficient conditions to determine generalized strictly diagonlly dominant matrices were given by means of some techniques for inequalities and a method for finding  positive diagonal matrix factors, and thus the corresponding results are improved and generalized. A numerical example was given to show the advantages of our new criteria.

Key words: diagonlly dominant matrices; α-chain diagonlly dominant matrices, nonzero elements chain; positive diagonally matrices

中图分类号: 

  • O151.21