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arXiv math/0008171math.DSmath.ATmath.KT
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置换平铺空间的同胚不变量

A Homeomorphism Invariant for Substitution Tiling Spaces

Nic Ormes, Charles Radin, Lorenzo Sadun

摘要:

我们推导出同胚不变量的瓷砖空间,而一般的替代规则多边形瓷砖,包括那些瓷砖,如风车,其中包含瓷砖在无限多个方向。不变量是切赫上同调的商,很容易直接从替换规则计算,并区分许多例子,包括大多数风车状平铺空间。我们还介绍了一种上同调模的结构,这种结构既方便又直观。

英文摘要:

We derive a homeomorphism invariant for those tiling spaces which are made by rather general substitution rules on polygonal tiles, including those tilings, like the pinwheel, which contain tiles in infinitely many orientations. The invariant is a quotient of Cech cohomology, is easily computed directly from the substitution rule, and distinguishes many examples, including most pinwheel-like tiling spaces. We also introduce a module structure on cohomology which is very convenient as well as of intuitive value.

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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