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arXiv 2201.11478math.AT
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持久图和度量图中的收缩

Contractions in persistence and metric graphs

Žiga Virk

摘要:

证明了从空间$X$到其子空间$A$的$1$ -Lipschitz收缩(收缩)的存在性,暗示了$A$的持久图嵌入到$X$的持久图中.作为一种工具,我们引入了持久化模块的紧密注入,作为诱导上述嵌入的映射。证明了度量图中最短回路上的收缩总是存在的,并推测了平面度量图中最短同调基上所有回路上的收缩的存在性。主要感兴趣的是测地空间中的环上的收缩。它们作为理想的圆坐标。此外,由于Adamaszek和Adams定理描述了$S^1$持久图的模式,因此压缩$X \to S^1$意味着相同的模式出现在$X$的持久图中。

英文摘要:

We prove that the existence of a $1$-Lipschitz retraction (a contraction) from a space $X$ onto its subspace $A$ implies the persistence diagram of $A$ embeds into the persistence diagram of $X$. As a tool we introduce tight injections of persistence modules as maps inducing the said embeddings. We show contractions always exist onto shortest loops in metric graphs and conjecture on existence of contractions in planar metric graphs onto all loops of a shortest homology basis. Of primary interest are contractions onto loops in geodesic spaces. These act as ideal circular coordinates. Furthermore, as the Theorem of Adamaszek and Adams describes the pattern of persistence diagram of $S^1$, a contraction $X \to S^1$ implies the same pattern appears in persistence diagram of $X$.

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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