arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.04397math.APmath.DS
收藏

广义Korteweg-de Vries和Benjamin-Ono方程的长时间动力学

Long time dynamics for generalized Korteweg-de Vries and Benjamin-Ono equations

Joackim Bernier, Benoît Grébert

摘要:

我们提供了一个精确的描述的长期动力学的解决方案的广义Korteweg-De Vries(gKdV)和Benjamin-Ono(gBO)方程的一维环面,没有外部参数,并发出从几乎任何(在概率和密度)小而光滑的初始数据。我们强调这两个方程具有无界的非线性。特别地,我们证明了一个Sobolev范数下的长时间稳定性结果:给定一个大的常数r和一个足够小的参数$ε$,对于一般的初始数据u(0)的大小为$ε$,我们控制解u(t)的Sobolev范数为$ε$ ^{--r}阶.这些结果是通过将系统置于有理规范形中得到的:我们在某些高阶余项之前,将这些方程的向量场共轭为围绕原点的大开集上的可积向量场,并且具有高Sobolev正则性.

英文摘要:

We provide an accurate description of the long time dynamics of the solutions of the generalized Korteweg-De Vries (gKdV) and Benjamin-Ono (gBO) equations on the one dimension torus, without external parameters, and that are issued from almost any (in probability and in density) small and smooth initial data. We stress out that these two equations have unbounded nonlinearities. In particular, we prove a long-time stability result in Sobolev norm: given a large constant r and a sufficiently small parameter $ε$, for generic initial datum u(0) of size $ε$, we control the Sobolev norm of the solution u(t) for times of order $ε$^{--r}. These results are obtained by putting the system in rational normal form : we conjugate, up to some high order remainder terms, the vector fields of these equations to integrable ones on large open sets surrounding the origin in high Sobolev regularity.

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。

↑