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arXiv 2103.04338math.DGmath.AP
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关于二维空间形式中的逆曲率流

On an inverse curvature flow in two-dimensional space forms

Kwok-Kun Kwong, Yong Wei, Glen Wheeler, Valentina-Mira Wheeler

AI总结:

本文研究二维空间形式中由加权逆曲率与支撑函数之差驱动的一类逆曲率流,证明解的长时间存在性与指数收敛到测地圆,并由此得到等周不等式、加权几何不等式及 Girão-Pinheiro 猜想在 n=2 时的反例。

摘要:

我们研究二维空间形式中紧致凸曲线的演化。法向速度由加权逆曲率与支撑函数的差给出,并且在环境空间为欧氏平面的情形下,该流等价于标准的逆曲率流。我们证明解对任意时间存在,并在光滑拓扑下以指数速度收敛到标准测地圆。这具有若干推论:第一,证明等周不等式;第二,建立一系列加权几何不等式;第三,给出 Girão-Pinheiro 猜想在 $n=2$ 情形下的一个反例。

英文摘要:

We study the evolution of compact convex curves in two-dimensional space forms. The normal speed is given by the difference of the weighted inverse curvature with the support function, and in the case where the ambient space is the Euclidean plane, is equivalent to the standard inverse curvature flow. We prove that solutions exist for all time and converge exponentially fast in the smooth topology to a standard round geodesic circle. This has a number of consequences: first, to prove the isoperimetricinequality; second, to establish a range of weighted geometric inequalities; and third, to give a counterexample to the $n=2$ case of a conjecture of Girão-Pinheiro.

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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