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arXiv 1703.07293math.AP
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平面Euler方程的Liouville定理

A Liouville theorem for the Euler equations in the plane

Francois Hamel, Nikolai Nadirashvili

摘要:

本文研究了二维平面R^2中无驻点的理想不可压缩流体定常有界流动的定性性质。我们证明了任何这样的流动都是剪切流,也就是说,它平行于某个常数矢量。这刘维型结果的证明首先是基于对流函数的水平曲线的几何性质的研究,其次是基于对流的幅角的至多对数增长的一些估计的推导。这些估计导致的结论是,流线的流动都是平行线。

英文摘要:

This paper is concerned with qualitative properties of bounded steady flows of an ideal incompressible fluid with no stagnation point in the two-dimensional plane R^2. We show that any such flow is a shear flow, that is, it is parallel to some constant vector. The proof of this Liouville-type result is firstly based on the study of the geometric properties of the level curves of the stream function and secondly on the derivation of some estimates on the at most logarithmic growth of the argument of the flow. These estimates lead to the conclusion that the streamlines of the flow are all parallel lines.

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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