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arXiv 2311.08142math.AP
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负Sobolev空间中的中间长波方程

Intermediate long wave equation in negative Sobolev spaces

Andreia Chapouto, Justin Forlano, Guopeng Li, Tadahiro Oh, Didier Pilod

AI总结:

本文在负Sobolev空间中研究中间长波方程,将其视为Benjamin-Ono方程的扰动并利用后者的完全可积性,证明了当-1/2<s<0时解的整体时间先验界,同时利用显式解证明了当s<-1/2时方程不适定,从而确定s=-1/2为任意深度参数下的临界正则性。

摘要:

我们在负Sobolev空间中研究了中间长波方程(ILW)。特别地,尽管缺乏尺度不变性,我们通过建立以下两个结果,将正则性 $s = -\ rac 12$ 确定为任意深度参数下ILW的临界正则性。(i) 通过将ILW视为Benjamin-Ono方程(BO)的扰动并利用BO的完全可积性,我们建立了 $ - \ rac 12 < s < 0$ 时ILW解的 $H^s$-范数的整体时间先验界。(ii) 利用显式解,我们证明了当 $s < - \ rac 12$ 时,ILW在 $H^s$ 中是不适定的。我们的结果适用于实数线情形和周期情形。

英文摘要:

We study the intermediate long wave equation (ILW) in negative Sobolev spaces. In particular, despite the lack of scaling invariance, we identify the regularity $s = -\frac 12$ as the critical regularity for ILW with any depth parameter, by establishing the following two results. (i) By viewing ILW as a perturbation of the Benjamin-Ono equation (BO) and exploiting the complete integrability of BO, we establish a global-in-time a priori bound on the $H^s$-norm of a solution to ILW for $ - \frac 12 < s < 0$. (ii) By making use of explicit solutions, we prove that ILW is ill-posed in $H^s$ for $s < - \frac 12$. Our results apply to both the real line case and the periodic case.

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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