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重正化群方法在一类奇异摄动边值问题中的应用

吴克义1,付苗苗2,吕显瑞3   

  1. 1.南平师范专科学校数学系,福建省南平353000;2.长春师范学院信息技术学院,长春 130032;3.吉林大学数学学院,长春130012
  • 收稿日期:2005-01-24 修回日期:1900-01-01 出版日期:2005-09-26 发布日期:2005-09-26
  • 通讯作者: 吕显瑞

Renormalization Group Method Applied in a Class of Singular Perturbation Boundary Value Problems

WU Ke-yi1,FU Miao-miao2,Lü Xian-rui3   

  1. (1.Department of Mathematics,Nanping Normal College,Nanping 353000,Fujian Province,China;2.College of Information and Technology,Changchun Normal University,Changchun 13
  • Received:2005-01-24 Revised:1900-01-01 Online:2005-09-26 Published:2005-09-26
  • Contact: Lü Xian-rui

摘要: 用重正化群方法,对一类非线性奇异摄动问题构造了一致有效的渐近展式.在构造渐近展式时,既不需要对摄动序列的结构做特别的假设,也不需要使用渐近匹配,而是直接生成适用于问题的渐近序列.结果表明,用重正化群方法处理奇异摄动问题,比用传统的方法更简单有效.

关键词: 重正化群方法, 奇异摄动, 渐近展式

Abstract: The present paper presents an uniformly valid asymptotic expansion for a class of singular perturbation boundary value problems via the renormalization group method.In contrast to the conventional methods,the renormalization group approach requires neither ad hoc assumpations about the structure of perturbation series nor the use of asymptotic matching,therefore this method is more useful than the conventional methods.

Key words: renormalization group method, singular perturbation, asymptotic expansions

中图分类号: 

  • O175.12