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Existence of Periodic Solutions for Fourth Order Duffing Equations

JIA Xiuli1,2, LU Xiushuang1, JI Shu guan1   

  1. 1. College of Mathematics, Jilin University, Changchun 130012, China;2. Jilin Grain College, Changchun 130062, China
  • Received:2006-06-23 Revised:1900-01-01 Online:2007-03-26 Published:2007-03-26
  • Contact: JIA Xiuli

Abstract: The existence of periodic solutions of fourth order Duffing equations x(4)+x′+g(x)=e(t) is proved via the topological degree theory.

Key words: Duffing equation, periodic solution, topological degree

CLC Number: 

  • O175.1