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arXiv 2012.02956math.AP
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具有各向异性分数阶耗散的SQG方程解的整体正则性和时间衰减性

Global regularity and time decay for the SQG equation with anisotropic fractional dissipation

Zhuan Ye

摘要:

本文主要研究具有分数阶水平耗散和分数阶垂直热扩散的二维地面准地转方程。一方面,当耗散率被限制在适当的范围内时,通过一些包含分数阶导数的各向异性嵌入和插值不等式,得到了地表准地转方程的整体正则性.一方面,利用各向异性插值不等式得到了整体弱解的最优大时间衰减估计。此外,基于建立解的整体$\dot{H}^1$ -范数所采用的论证,我们得到了上述整体光滑解的最优大时间衰减估计.最后,还导出了完全解与相应线性部分的解之间的差的衰减估计。

英文摘要:

In this paper, we focus on the two-dimensional surface quasi-geostrophic equation with fractional horizontal dissipation and fractional vertical thermal diffusion. On the one hand, when the dissipation powers are restricted to a suitable range, the global regularity of the surface quasi-geostrophic equation is obtained by some anisotropic embedding and interpolation inequalities involving fractional derivatives. One the one hand, we obtain the optimal large time decay estimates for global weak solutions by an anisotropic interpolation inequality. Moreover, based on the argument adopted in establishing the global $\dot{H}^1$-norm of the solution, we obtain the optimal large time decay estimates for the above obtained global smooth solutions. Finally, the decay estimates for the difference between the full solution and the solution to the corresponding linear part are also derived.

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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