广西师范大学学报(自然科学版) ›› 2026, Vol. 44 ›› Issue (3): 121-127.doi: 10.16088/j.issn.1001-6600.2025072302

• 数学 • 上一篇    下一篇

有限图上非负预定函数Toda系统的Brouwer度

张莲, 蒋作海*   

  1. 广西师范大学 数学与统计学院, 广西 桂林 541006
  • 收稿日期:2025-07-23 修回日期:2025-09-03 出版日期:2026-05-05 发布日期:2026-05-13
  • 通讯作者: 蒋作海(1986—), 男, 广西桂林人, 广西师范大学副教授, 博士。E-mail: jiangzuohai08@163.com
  • 基金资助:
    国家自然科学基金(12561009);广西自然科学基金(2022GXNSFBA035465); 广西科技计划项目(桂科AD22035202)

Brouwer Degree for Toda System with Nonnegative Prescribed Functions on a Finite Graph

ZHANG Lian, JIANG Zuohai*   

  1. School of Mathematics and Statistics, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2025-07-23 Revised:2025-09-03 Online:2026-05-05 Published:2026-05-13

摘要: 本文利用度理论研究连通有限图上的Toda系统, 证明具有非负预定函数Toda系统的所有解都一致有界, 由此得到该Toda系统的Brouwer度是良定义的。根据同伦不变性证明非负预定函数Toda系统的Brouwer度等于1,作为推论,导出非负预定函数的Toda系统可解。

关键词: 有限图, Toda系统, 非负预定函数, Brouwer度, 可解性

Abstract: This paper investigates the Toda system on connected finite graphs using degree theory. It is proven that all solutions of the Toda system with nonnegative prescribed functions are uniformly bounded, which implies that the Brouwer degree of such a Toda system is well-defined. By the homotopy invariance, the Brouwer degree of the Toda system with nonnegative prescribed functions is shown to be equal to 1. As a corollary, this suggests that the Toda system with nonnegative prescribed functions is solvable.

Key words: finite graphs, Toda system, nonnegative prescribed functions, Brouwer degree, solvability

中图分类号:  O175.25

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