数学物理学报

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一类五次多项式系统原点等时中心的分析

王勤龙; 刘一戎   

  1. 长江大学信息与数学学院 荆州 434023
  • 收稿日期:2005-12-11 修回日期:2006-11-20 出版日期:2007-12-25 发布日期:2007-12-25
  • 通讯作者: 王勤龙
  • 基金资助:
    湖北省教育厅重点项目(2003A008)资助

Isochronous Center for a Class of Quintic System

Wang Qinlong; Liu Yirong   

  1. Department of Information and Mathematics, Yangtze University, Jingzhou 434100
  • Received:2005-12-11 Revised:2006-11-20 Online:2007-12-25 Published:2007-12-25
  • Contact: Wang Qinlong

摘要: 研究了一类五次系统原点复等时中心的问题.先通过一种最新算法求出了这类五次系统原点的周期常数,从而得到复等时中心的必要条件,并利用一些有效途径证明它们的充分性.这实际上解决了这类五次系统的伴随系统原点等时中心问题与其自身为实系统时鞍点可线性化的问题.

关键词: 复等时中心, 线性化, 周期常数, 五次系统

Abstract: The complex isochronous centers for a class of quintic systems are
discussed. This article, following a new algorithm to compute periodic constants, then mainly finding a proper change of coordinates to judge the origin as complex isochronous center, obtains all real isochronous centers and saddle point linearizable conditions.

Key words: Complex isochronicity, Linearization, Period constants, Quintic system.

中图分类号: 

  • 34C05