A new result for the local well-posedness of the generalized Camassa-Holm equations in critial Besov spaces $B^{\frac{1}{p}}_{p,1},1\leq p<+\infty$

TL;DR

This paper establishes local well-posedness for the generalized Camassa-Holm equations in critical Besov spaces, improving previous regularity conditions by employing Lagrange coordinates and Moser-type inequalities.

Contribution

It proves local well-posedness in critical Besov spaces with minimal regularity assumptions, using novel techniques to handle uniqueness.

Findings

Improved regularity conditions for well-posedness.

Successful application of Lagrange coordinates for uniqueness.

Enhanced understanding of the equations' behavior in critical spaces.

Abstract

This paper is devoted to studying the local well-posedness (existence,uniqueness and continuous dependence) for the generalized Camassa-Holm equations in critial Besov spaces $B^{\frac{1}{p}}_{p,1}$ with $1\leq p<+\infty$, which improves the previous index $s> \max\{\frac{1}{2},\frac{1}{p}\}$ or $s=\frac{1}{p},\ p\in[1,2],\ r=1$ in \cite{linb,tu-yin4}. The main difficulty is to prove the uniqueness, which need to use the Moser-type inequality. To overcome the difficulty, we use the Lagrange coordinate transformation to obtain the uniqueness.