arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math-ph/0503016math-phmath.MP
收藏

变系数mKdV孤立波的长时间动力学

Long-Time Dynamics of Variable Coefficient mKdV Solitary Waves

S. I. Dejak, B. L. G. Jonsson

摘要:

研究Korteweg-de Vries型方程dt u=-dx(dx ^2 u+f(u)-B(t,x)u),其中B是一个小的有界的慢变函数,f是一个非线性项.许多变系数KdV型方程都可以转化为该方程。我们研究了初始条件接近稳定的B=0孤立波的解的长时间行为。我们证明了在较长的时间间隔内,这样的解具有孤立波的形式,其中心和尺度根据涉及函数B(t,x)的一定动力学规律以及H^1-小涨落而演化。

英文摘要:

We study the Korteweg-de Vries-type equation dt u=-dx(dx^2 u+f(u)-B(t,x)u), where B is a small and bounded, slowly varying function and f is a nonlinearity. Many variable coefficient KdV-type equations can be rescaled into this equation. We study the long time behaviour of solutions with initial conditions close to a stable, B=0 solitary wave. We prove that for long time intervals, such solutions have the form of the solitary wave, whose centre and scale evolve according to a certain dynamical law involving the function B(t,x), plus an H^1-small fluctuation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑