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arXiv 1901.03048cs.CGmath.GT
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通过最优部分传输理解持久图空间的拓扑与几何

Understanding the Topology and the Geometry of the Space of Persistence Diagrams via Optimal Partial Transport

Vincent Divol, Théo Lacombe

AI总结:

本文通过最优部分传输将持久图空间推广为上半平面上的拉东测度空间,刻画其拓扑与几何性质,并用于研究随机持久图的统计特性。

摘要:

尽管拓扑数据分析中使用的度量与最优传输度量之间存在明显的相似性,但基于最优传输的形式体系来研究持久图及类似的拓扑描述符尚未出现。在本文中,通过将持久图空间视为离散测度空间,并观察到其度量可以表示为最优部分传输问题,我们引入了持久图的一种推广,即支撑在上半平面上的拉东测度。这类测度在拓扑数据分析中自然出现,当考虑持久图的连续表示(例如持久曲面)时,也作为持久图上大数定律的极限或持久图空间上概率分布的期望。我们探索了这一新空间的拓扑性质,这些性质对于持久图的闭子空间同样成立。新结果包括:关于Wasserstein度量收敛的刻画,任意图分布的重心(Fréchet均值)的几何描述,以及持久图连续线性表示的详尽描述。我们还通过提供若干统计结果展示了这一框架在研究随机持久图方面的优势,这些结果因这一新形式体系而具有意义。

英文摘要:

Despite the obvious similarities between the metrics used in topological data analysis and those of optimal transport, an optimal-transport based formalism to study persistence diagrams and similar topological descriptors has yet to come. In this article, by considering the space of persistence diagrams as a space of discrete measures, and by observing that its metrics can be expressed as optimal partial transport problems, we introduce a generalization of persistence diagrams, namely Radon measures supported on the upper half plane. Such measures naturally appear in topological data analysis when considering continuous representations of persistence diagrams (e.g.\ persistence surfaces) but also as limits for laws of large numbers on persistence diagrams or as expectations of probability distributions on the persistence diagrams space. We explore topological properties of this new space, which will also hold for the closed subspace of persistence diagrams. New results include a characterization of convergence with respect to Wasserstein metrics, a geometric description of barycenters (Fréchet means) for any distribution of diagrams, and an exhaustive description of continuous linear representations of persistence diagrams. We also showcase the strength of this framework to study random persistence diagrams by providing several statistical results made meaningful thanks to this new formalism.

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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