摘要
孤立波现象是很活跃的一个研究领域,但带有小扰动的方程的孤立波目前研究还较少 讨论奇异扰动MKdV KS方程孤立波解的存在性,利用孤立波与同宿轨之间的关系,通过变量替换,将MKdV KS方程约化为带快-慢变量的常微分方程组,利用奇异扰动定性理论,找出退化慢子系统的同宿轨,证明扰动之后的方程组也存在同宿轨,从而证明MKdV
Geometric singular perturbation method is applied to investigate the existence of solitary waves in MKdVKS equation. Firstly, we change MKdVKS equation into slowfast ordinary differential equation system. Because solitary waves are firmly connected with homoclinic orbits, we then prove, by geometric singular perturbation method, that the perburbed system has a homoclinic orbit. Thus, the existence of solitary waves in singular perturbed MKdVKS equation is verified.
出处
《江苏大学学报(自然科学版)》
EI
CAS
2003年第5期82-84,共3页
Journal of Jiangsu University:Natural Science Edition
基金
国家自然科学基金资助项目(10071003)
关键词
MKdV-KS方程
奇异扰动
孤立波
同宿轨
MKdV-KS equation
geometric singular perturbation
solitary wave
homoclinic orbit