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arXiv 1706.05752math.AP
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Korteweg-de Vries方程的线性渐近稳定性及周期波附近的调制行为

Linear Asymptotic Stability and Modulation Behavior near Periodic Waves of the Korteweg-de Vries Equation

L. Miguel Rodrigues

摘要:

我们提供了一个详细的研究动力学通过线性化的Korteweg-de Vries方程的周期性行波,椭圆余弦波。在适当的意义下,线性地类似于空间调制稳定性,我们证明了在任何索伯列夫空间中的全局时间有界稳定性和色散型的渐近稳定性。此外,我们提供了一个领先的顺序描述的动态缓慢调制的局部参数和渐近调制系统和有效的初始数据,这些参数的演变。这就需要对具有非常系数的非正规算子所产生的动力学进行全球时间研究。在路上,我们还证明估计振荡积分特别适合于获得大时间渐近系统,可能是一些普遍的兴趣。

英文摘要:

We provide a detailed study of the dynamics obtained by linearizing the Korteweg-de Vries equation about one of its periodic traveling waves, a cnoidal wave. In a suitable sense, linearly analogous to space-modulated stability, we prove global-in-time bounded stability in any Sobolev space, and asymptotic stability of dispersive type. Furthermore, we provide both a leading-order description of the dynamics in terms of slow modulation of local parameters and asymptotic modulation systems and effective initial data for the evolution of those parameters. This requires a global-in-time study of the dynamics generated by a non normal operator with non constant coefficients. On the road we also prove estimates on oscillatory integrals particularly suitable to derive large-time asymptotic systems that could be of some general interest.

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。

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