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arXiv 2109.00752math.APmath-phmath.MP
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软势Boltzmann方程的$L^p_vL^\infty_TL^\infty_x$大振幅解

Large amplitude solutions in $L^p_vL^\infty_TL^\infty_x$ to the Boltzmann equation for soft potentials

Zongguang Li

摘要:

本文考虑了在整体Maxwillians附近的角截断Boltzmann方程的Cauchy问题,无论是在整个空间还是在环面上都是软势。当初始扰动的加权$L^p_vL^{\infty}_x$范数可以任意大,但$L^1_xL^\infty_v$范数和缺陷质量、能量和熵都足够小时,我们在具有适当大的多项式速度权的空间$L^p_vL^{\infty}_{T}L^{\infty}_{x}$中建立了整体唯一温和解的存在性.证明是基于当地的时间存在性,以及通过在$L^p_vL^{\infty}_{T}L^{\infty}_{x}$和$L^{\infty}_{T}L^{\infty}_{x}L^1_v$的相互作用的一致的先验估计。

英文摘要:

In this paper we consider the Cauchy problem on the angular cutoff Boltzmann equation near global Maxwillians for soft potentials either in the whole space or in the torus. We establish the existence of global unique mild solutions in the space $L^p_vL^{\infty}_{T}L^{\infty}_{x}$ with polynomial velocity weights for suitably large $p\leq \infty$, whenever for the initial perturbation the weighted $L^p_vL^{\infty}_x$ norm can be arbitrarily large but the $L^1_xL^\infty_v$ norm and the defect mass, energy and entropy are sufficiently small. The proof is based on the local in time existence as well as the uniform a priori estimates via an interplay in $L^p_vL^{\infty}_{T}L^{\infty}_{x}$ and $L^{\infty}_{T}L^{\infty}_{x}L^1_v$.

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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