华东师范大学学报(自然科学版) ›› 2024, Vol. 2024 ›› Issue (2): 23-29.doi: 10.3969/j.issn.1000-5641.2024.02.003

• 数学 • 上一篇    下一篇

几类允许代数正的符号模式矩阵

田岩1,*(), 焦旸1, 于浩然2   

  1. 1. 辽宁师范大学 数学学院, 辽宁 大连 116029
    2. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2022-09-11 出版日期:2024-03-25 发布日期:2024-03-18
  • 通讯作者: 田岩 E-mail:tiantian8835@163.com
  • 基金资助:
    国家自然科学基金(12001225); 辽宁省教育厅自然科学研究青年项目(LQ2020021)

Several classes of sign pattern matrices that allow algebraic positivity

Yan TIAN1,*(), Yang JIAO1, Haoran YU2   

  1. 1. School of Mathematics, Liaoning Normal University, Dalian, Liaoning  116029, China
    2. School of Mathematics, Jilin University, Changchun 130012, China
  • Received:2022-09-11 Online:2024-03-25 Published:2024-03-18
  • Contact: Yan TIAN E-mail:tiantian8835@163.com

摘要:

考虑三对角符号模式矩阵和爪形符号模式矩阵, 讨论了三对角符号模式矩阵和爪形符号模式矩阵是否允许代数正. 借助组合矩阵论和图论的方法, 给出了这两类符号模式矩阵允许代数正的必要条件. 最后, 分别给出了$n $阶三对角符号模式矩阵和$n $阶爪形符号模式矩阵允许代数正的等价条件.

关键词: 符号模式矩阵, 允许代数正, 三对角符号模式矩阵, 爪形符号模式矩阵

Abstract:

Tridiagonal sign pattern matrices and paw form sign pattern matrices were analyzed with respect to their potential for ensuring algebraic positivity. The necessary conditions allowing algebraic positivity of the two classes of sign pattern matrices were given using combinatorial matrix theory and graph theory. Finally, the equivalent conditions that would ensure algebraic positivity of tridiagonal sign pattern matrices and paw form sign pattern matrices of order $n $ were determined.

Key words: sign pattern matrix, allow algebraic positivity, tridiagonal sign pattern matrix, paw form sign pattern matrix

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