arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.09359math.DSmath.COmath.LO
收藏

Borel因子与系统在子移位中的嵌入

Borel factors and embeddings of systems in subshifts

Nishant Chandgotia, Spencer Unger

摘要:

本文研究Polish空间上群$\mathbb Z^d$的自由Borel作用的组合学。建立在最近的工作,由Eschericha和Meyerovitch,我们介绍了性质$F$的$\mathbb Z^d$ -移位空间$X$下,有一个等变映射从任何自由Borel行动的自由部分的$X$。在进一步的熵假设下,我们证明了任何子移位$Y$(模周期点)可以Borel嵌入到$X$。几个例子满足性质$F$,包括但不限于,适当的$3$ -着色的空间,矩形的平铺(在自然算术条件下),$\mathbb Z^d$的适当的$2d$ -边着色和双无限哈密顿路径的空间。这回答了Seward和Gao-Jackson提出的问题,并恢复了Weilacher的一个结果和Gao-Jackson-Krohne-Seward宣布的一些结果。

英文摘要:

In this paper we study the combinatorics of free Borel actions of the group $\mathbb Z^d$ on Polish spaces. Building upon recent work by Chandgotia and Meyerovitch, we introduce property $F$ on $\mathbb Z^d$-shift spaces $X$ under which there is an equivariant map from any free Borel action to the free part of $X$. Under further entropic assumptions, we prove that any subshift $Y$ (modulo the periodic points) can be Borel embedded into $X$. Several examples satisfy property $F$ including, but not limited to, the space of proper $3$-colourings, tilings by rectangles (under a natural arithmetic condition), proper $2d$-edge colourings of $\mathbb Z^d$ and the space of bi-infinite Hamiltonian paths. This answers questions raised by Seward, and Gao-Jackson, and recovers a result by Weilacher and some results announced by Gao-Jackson-Krohne-Seward.

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。

↑