Applied Mathematics and Mechanics (English Edition) ›› 2000, Vol. 21 ›› Issue (11): 1282-1291.

• 论文 • 上一篇    下一篇

THE EXISTENCE OF PERIODIC SOLUTIONS FOR NONLINEAR SYSTEMS OF FIRST-ORDER DIFFERENTIAL EQUATIONS AT RESONANCE

马世旺1,2, 王志成2, 庾建设2   

  1. 1. Department of Applied Mathematics, Shanghai Jiaotong University, Shanghai 200030, P R China;
    2. Department of Applied Mathematics, Hunan University, Changsha 410082, P R China
  • 收稿日期:1998-03-25 修回日期:2000-04-12 出版日期:2000-11-18 发布日期:2000-11-18
  • 基金资助:
    the National Natural Science Foundation of China(19801014;19971026;19831030)

THE EXISTENCE OF PERIODIC SOLUTIONS FOR NONLINEAR SYSTEMS OF FIRST-ORDER DIFFERENTIAL EQUATIONS AT RESONANCE

MA Shi-wang1,2, WANG Zhi-cheng2, YU Jian-she2   

  1. 1. Department of Applied Mathematics, Shanghai Jiaotong University, Shanghai 200030, P R China;
    2. Department of Applied Mathematics, Hunan University, Changsha 410082, P R China
  • Received:1998-03-25 Revised:2000-04-12 Online:2000-11-18 Published:2000-11-18
  • Supported by:
    the National Natural Science Foundation of China(19801014;19971026;19831030)

摘要: The nonlinear system of first-order differential equations with a deviating argument
x(t)=Bx(t)+F(x(t-τ))+p(t)
is considered,where x(t)∈R2,τ∈R,B∈R2×2,F is bounded and p(t)is continuous and 2π-periodic.Some sufficient conditions for the existence of 2π-periodic solutions of the above equation,in a resonance case,by using the Brouwer degree theory and a continuation theorem based on Mawhin's co incidence degree are obtained.Some applications of the main results to Duffing's equations are also given.

Abstract: The nonlinear system of first-order differential equations with a deviating argument
x(t)=Bx(t)+F(x(t-τ))+p(t)
is considered,where x(t)∈R2,τ∈R,B∈R2×2,F is bounded and p(t)is continuous and 2π-periodic.Some sufficient conditions for the existence of 2π-periodic solutions of the above equation,in a resonance case,by using the Brouwer degree theory and a continuation theorem based on Mawhin's co incidence degree are obtained.Some applications of the main results to Duffing's equations are also given.

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