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arXiv 1312.5960math.AP
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超临界准地转方程的Gevrey正则性

Gevrey regularity for the supercritical quasi-geostrophic equation

Animikh Biswas

摘要:

本文采用Foias和Temam的方法,以“临界”索伯列夫空间为初值,建立了超临界准地转方程解在全空间上的Gevrey类正则性.此外,我们得到的Gevrey类是“近最优”的,作为推论,我们得到的时间衰减率的高阶Sobolev规范的解决方案。与Navier-Stokes方程或亚临界准地转方程不同,低耗散对建立Gevrey正则性造成了困难。一个新的交换子估计Gevrey类,涉及并矢Littlewood-Paley算子,建立,使我们能够利用方程的取消属性,规避这一困难。

英文摘要:

In this paper, following the techniques of Foias and Temam, we establish suitable Gevrey class regularity of solutions to the supercritical quasi-geostrophic equations in the whole space, with initial data in "critical" Sobolev spaces. Moreover, the Gevrey class that we obtain is "near optimal" and as a corollary, we obtain temporal decay rates of higher order Sobolev norms of the solutions. Unlike the Navier-Stokes or the subcritical quasi-geostrophic equations, the low dissipation poses a difficulty in establishing Gevrey regularity. A new commutator estimate in Gevrey classes, involving the dyadic Littlewood-Paley operators, is established that allow us to exploit the cancellation properties of the equation and circumvent this difficulty.

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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