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arXiv 1108.2249math.AP
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关于周期Korteweg-de Vries方程的normal form方法

On the periodic Korteweg-de Vries equation: a normal form approach

Seungly Oh

摘要:

利用规范形变换讨论了KdV方程在周期背景下低正则解的一种改进的光滑化现象。结果,从$H^{-1/2+}$上的球到$C_0^t ([0,T], H^{-1/2+})$的解映射可以被示出为$H^{0+}_x$拓扑中的Lipschitz,其中Lipschitz常数仅取决于初始数据的粗糙范数$\|u_0\|_{H^{-1/2+}}$。在最近一篇关于低正则性下一维二次薛定谔方程的论文中也观察到了类似的情况。

英文摘要:

This paper discusses an improved smoothing phenomena for low-regularity solutions of the Korteweg-de Vries (KdV) equation in the periodic settings by means of normal form transformation. As a result, the solution map from a ball on $H^{-1/2+}$ to $C_0^t ([0,T], H^{-1/2+})$ can be shown to be Lipschitz in a $H^{0+}_x$ topology, where the Lipschitz constant only depends on the rough norm $\|u_0\|_{H^{-1/2+}}$ of the initial data. A similar episode has been observed in a recent paper on 1D quadratic Schrödinger equation in low-regularity setting.

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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