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arXiv 1802.03265math.DS
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19个Wang瓦片的自相似非周期集

A self-similar aperiodic set of 19 Wang tiles

Sébastien Labbé

摘要:

我们定义了一个基数为19的Wang图块集$\mathcal{U}$,并证明了所有有效Wang图块$\mathbb{Z}^2\to\mathcal{U}$的集$Ω_\mathcal{U}$是自相似的,非周期的,并且是$\mathcal{U}^{\mathbb{Z}^2}$的最小子移位.因此,$\mathcal{U}$是继Ammann的16个Wang瓦片的集合之后已知的第二小的自相似非周期Wang瓦片集合。证明是基于唯一的复合性质。我们证明了一个可扩展的,原始的和可识别的$2$维态射$ω:Ω_\mathcal{U}\toΩ_\mathcal{U}$的存在性,这是到一个移位。可识别性的证明分两步完成,在每一步使用相同的标准(标记瓦片的存在)来证明可识别的一维替换的存在,该替换将每个瓦片发送到单个瓦片或两个瓦片的多米诺骨牌上。

英文摘要:

We define a Wang tile set $\mathcal{U}$ of cardinality 19 and show that the set $Ω_\mathcal{U}$ of all valid Wang tilings $\mathbb{Z}^2\to\mathcal{U}$ is self-similar, aperiodic and is a minimal subshift of $\mathcal{U}^{\mathbb{Z}^2}$. Thus $\mathcal{U}$ is the second smallest self-similar aperiodic Wang tile set known after Ammann's set of 16 Wang tiles. The proof is based on the unique composition property. We prove the existence of an expansive, primitive and recognizable $2$-dimensional morphism $ω:Ω_\mathcal{U}\toΩ_\mathcal{U}$ that is onto up to a shift. The proof of recognizability is done in two steps using at each step the same criteria (the existence of marker tiles) for proving the existence of a recognizable one-dimensional substitution that sends each tile either on a single tile or on a domino of two tiles.

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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