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arXiv · 2502.16583

A remark on the zero-filter limit for the Camassa-Holm equation in $B^s_{2,\infty}(\R)$

Guorong Qu·Jianzhong Lu·Wei Deng
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Abstract

This paper investigates the zero-filter limit problem associated with the Camassa-Holm equation. In the work cited as \cite{C.L.L.W.L}, it was established that, under the hypothesis of initial data $u_0\in B^s_{2,r}(\R)$ with $s>\frac32$ and $1\leq r<\infty$, the solutions $\mathbf{S}_{t}^{\mathbf{\alpha}}(u_0)$ of the Camassa-Holm equation exhibit convergence in the $L^\infty_T(B^s_{2,r})$ norm to the unique solution of the Burgers equation as $\alpha\rightarrow 0$. Contrary to this result, the present study demonstrates that for initial data $u_0\in B^s_{2,\infty}(\R)$ the solutions of the Camassa-Holm equation fail to converge strongly in the $L^\infty_T(B^s_{2,\infty})$ norm to the Burgers equation as $\alpha\rightarrow 0$.

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Guorong Qu, Jianzhong Lu, Wei Deng. 2025-02-23. A remark on the zero-filter limit for the Camassa-Holm equation in $B^s_{2,\infty}(\R)$. https://arxiv.org/abs/2502.16583

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