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arXiv 2609.21357math.MGmath.DGmath.GT

Busemann $G$-空间的不相交圆盘性质

The disjoint disks property for Busemann $G$-spaces

  • Fukuoka University(福冈大学)
  • Northeastern University(东北大学)

机构由 AI 辅助整理,请以论文原文为准。

Tadashi Fujioka, Shijie Gu

AI总结:

本文证明维数至少为五的有限维 Busemann $G$-空间具有不相交圆盘性质,通过度量球面的同伦 $Z_2$-集性质及 Daverman 乘积定理实现,将 Busemann 猜想归结为分解问题。

AI中文摘要:

我们证明每个维数至少为五的有限维 Busemann $G$-空间具有不相交圆盘性质(DDP)。对于足够小的度量球面 $L=S(c,r)$,我们证明包含在精确距离水平中的每个嵌入弧都是 $L$ 中的同伦 $Z_2$-集。由此可知 $L$ 具有不相交弧-圆盘性质和不交同伦性质。Daverman 乘积定理随后给出 $L\times\mathbb R$ 的 DDP,而中心处的局部回避论证产生环境 $G$-空间的 DDP。由于有限维 Busemann $G$-空间是广义流形,在维数至少为五时,Busemann 猜想剩余的障碍是分解问题。

英文摘要:

We prove that every finite-dimensional Busemann \(G\)-space of dimension at least five has the disjoint disks property (DDP). For a sufficiently small metric sphere \(L=S(c,r)\), we show that every embedded arc contained in an exact distance level is a homotopical \(Z_2\)-set in \(L\). It follows that \(L\) has the disjoint arc-disk property and the disjoint homotopies property. Daverman's product theorem then gives DDP for \(L\times\mathbb R\), and a local avoidance argument at the center yields DDP for the ambient \(G\)-space. Since finite-dimensional Busemann \(G\)-spaces are generalized manifolds, in dimensions at least five the remaining obstruction to the Busemann conjecture is the resolution problem.

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