Abstract
In this paper, we first establish the local well-posedness for the Fornberg–Whitham-type equation in the Besov spaces \(B^{s}_{p,r}({\mathbb {R}})\) with \( 1\le p,r\le \infty \) and \(s> max\{1+\frac{1}{p},\frac{3}{2}\}\), which improve the previous work in Sobolev spaces \( H^{s}({\mathbb {R}})= B^{s}_{2,2}({\mathbb {R}})\) with \( s>\frac{3}{2}\) (Lai and Luo in J Differ Equ 344:509–521, 2023). Furthermore, we prove the solution is not uniformly continuous dependence on the initial data in the Besov spaces \(B^{s}_{p,r}({\mathbb {R}})\) with \( 1\le p\le \infty \),\( 1\le r< \infty \) and \(s> max\{1+\frac{1}{p},\frac{3}{2}\}\).
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Communicated by Adrian Constantin.
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Qi, X. Well-posedness and non-uniform dependence on initial data for the Fornberg–Whitham-type equation in Besov spaces. Monatsh Math (2024). https://doi.org/10.1007/s00605-024-01974-y
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DOI: https://doi.org/10.1007/s00605-024-01974-y