Ill-posedness in $B^s_{p,\infty}$ of the Euler equations: Non-continuous dependence

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Hauptverfasser: Li, Jinlu, Yu, Yanghai
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Veröffentlicht: 2025
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_version_ 1866912706309652480
author Li, Jinlu
Yu, Yanghai
author_facet Li, Jinlu
Yu, Yanghai
contents In this paper, we solve an open problem left in the monographs \cite[Bahouri-Chemin-Danchin, (2011)]{BCD}. Precisely speaking, it was obtained in \cite[Theorem 7.1 on pp293, (2011)]{BCD} the existence and uniqueness of $B^s_{p,\infty}$ solution for the Euler equations. We furthermore prove that the solution map of the Euler equation is not continuous in the Besov spaces from $B^s_{p,\infty}$ to $L_T^\infty B^s_{p,\infty}$ for $s>1+d/p$ with $1\leq p\leq \infty$ and in the Hölder spaces from $C^{k,α}$ to $L_T^\infty C^{k,α}$ with $k\in \mathbb{N}^+$ and $α\in(0,1)$, which later covers particularly the ill-posedness of $C^{1,α}$ solution in \cite[Trans. Amer. Math. Soc., (2018)]{MYtams}. Beyond purely technical aspects on the choice of initial data, a remarkable novelty of the proof is the construction of an approximate solution to the Burgers equation.
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id arxiv_https___arxiv_org_abs_2509_12619
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Ill-posedness in $B^s_{p,\infty}$ of the Euler equations: Non-continuous dependence
Li, Jinlu
Yu, Yanghai
Analysis of PDEs
In this paper, we solve an open problem left in the monographs \cite[Bahouri-Chemin-Danchin, (2011)]{BCD}. Precisely speaking, it was obtained in \cite[Theorem 7.1 on pp293, (2011)]{BCD} the existence and uniqueness of $B^s_{p,\infty}$ solution for the Euler equations. We furthermore prove that the solution map of the Euler equation is not continuous in the Besov spaces from $B^s_{p,\infty}$ to $L_T^\infty B^s_{p,\infty}$ for $s>1+d/p$ with $1\leq p\leq \infty$ and in the Hölder spaces from $C^{k,α}$ to $L_T^\infty C^{k,α}$ with $k\in \mathbb{N}^+$ and $α\in(0,1)$, which later covers particularly the ill-posedness of $C^{1,α}$ solution in \cite[Trans. Amer. Math. Soc., (2018)]{MYtams}. Beyond purely technical aspects on the choice of initial data, a remarkable novelty of the proof is the construction of an approximate solution to the Burgers equation.
title Ill-posedness in $B^s_{p,\infty}$ of the Euler equations: Non-continuous dependence
topic Analysis of PDEs
url https://arxiv.org/abs/2509.12619