数学物理学报(英文版) ›› 2012, Vol. 32 ›› Issue (2): 695-709.doi: 10.1016/S0252-9602(12)60049-6

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THE INTERIOR LAYER FOR A NONLINEAR SINGULARLY PERTURBED DIFFERENTIAL-DIFFERENCE EQUATION

王爱峰1,2,3|倪明康1,3   

  1. 1. Department of Mathematics, East China Normal University, Shanghai 200062, China
    2. School of Mathematical Science, Huaiyin Normal University, Huaian 223001, China
    3. Division of Computational Science, E-Institute of Shanghai Universities at SJTU, Shanghai 200030
  • 收稿日期:2010-09-23 修回日期:2011-03-12 出版日期:2012-03-20 发布日期:2012-03-20
  • 基金资助:

    Supported by the National Natural Science Funds (11071075), the Natural Science Foundation of Shanghai (10ZR1409200), the National Laboratory of Biomacro-molecules, Institute of Biophysics, Chinese Academy of Sciences, and the E-Institutes of Shanghai Municipal
    Education Commissions (E03004).

THE INTERIOR LAYER FOR A NONLINEAR SINGULARLY PERTURBED DIFFERENTIAL-DIFFERENCE EQUATION

 WANG Ai-Feng1,2,3, NI Ming-Kang1,3   

  1. 1. Department of Mathematics, East China Normal University, Shanghai 200062, China
    2. School of Mathematical Science, Huaiyin Normal University, Huaian 223001, China
    3. Division of Computational Science, E-Institute of Shanghai Universities at SJTU, Shanghai 200030
  • Received:2010-09-23 Revised:2011-03-12 Online:2012-03-20 Published:2012-03-20
  • Supported by:

    Supported by the National Natural Science Funds (11071075), the Natural Science Foundation of Shanghai (10ZR1409200), the National Laboratory of Biomacro-molecules, Institute of Biophysics, Chinese Academy of Sciences, and the E-Institutes of Shanghai Municipal
    Education Commissions (E03004).

摘要:

In this article, the interior layer for a second order nonlinear singularly per-turbed differential-difference equation is considered. Using the methods of boundary func-tion and fractional steps, we construct the formula of asymptotic expansion and point out that the boundary layer at t = 0 has a great influence upon the interior layer at t = σ. At the same time, on the basis of differential inequality techniques, the existence of the smooth solution and the uniform validity of the asymptotic expansion are proved. Finally, an example is given to demonstrate the effectiveness of our result. The result of this article is new and it complements the previously known ones.

关键词: Differential-difference equation, interior layer, asymptotic expansion, bound-ary function

Abstract:

In this article, the interior layer for a second order nonlinear singularly per-turbed differential-difference equation is considered. Using the methods of boundary func-tion and fractional steps, we construct the formula of asymptotic expansion and point out that the boundary layer at t = 0 has a great influence upon the interior layer at t = σ. At the same time, on the basis of differential inequality techniques, the existence of the smooth solution and the uniform validity of the asymptotic expansion are proved. Finally, an example is given to demonstrate the effectiveness of our result. The result of this article is new and it complements the previously known ones.

Key words: Differential-difference equation, interior layer, asymptotic expansion, bound-ary function

中图分类号: 

  • 34E20