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arXiv 2303.09191math.GT
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球面背景几何中的组合曲率流

A combinatorial curvature flow in spherical background geometry

Huabin Ge, Bobo Hua, Puchun Zhou

摘要:

文[12]用流方法证明了在组合条件下欧氏或双曲背景几何中理想圆模式的存在性。它仍然是一个开放的问题,为球形的情况。本文引入了球面背景几何中的组合测地曲率流,它类似于Chow和Luo在[4]中的组合里奇流。我们刻画了流收敛的充分和必要条件。也就是说,规定的测地曲率满足一定的几何和组合条件,当且仅当对于任何初始数据的流指数快速收敛到一个圆模式与给定的总测地曲率在每个圆。我们的结果可以看作是球壳问题的一个解决方案。据我们所知,这是第一个具有优良性质的球形背景几何中的组合曲率流,并且它提供了一个算法来寻找所需的理想圆图案。

英文摘要:

In [12], the existence of ideal circle patterns in Euclidean or hyperbolic background geometry under the combinatorial conditions was proved using flow approaches. It remains as an open problem for the spherical case. In this paper, we introduce a combinatorial geodesic curvature flow in spherical background geometry, which is analogous to the combinatorial Ricci flow of Chow and Luo in [4]. We characterize the sufficient and necessary condition for the convergence of the flow. That is, the prescribed geodesic curvature satisfies certain geometric and combinatorial condition if and only if for any initial data the flow converges exponentially fast to a circle pattern with given total geodesic curvature on each circle. Our result could be regarded as a resolution of the problem in the spherical case. As far as we know, this is the first combinatorial curvature flow in spherical background geometry with fine properties, and it provides an algorithm to find the desired ideal circle pattern.

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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