Pattern-equivariant cohomology with integer coefficients

Pattern-equivariant cohomology with integer coefficients
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具有整数系数的模式等变上同调

DOI:
10.1017/s0143385707000259
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发表时间:
2006
影响因子:
0.9
通讯作者:
L. Sadun
L. Sadun
中科院分区:
数学2区
文献类型:
--
作者:
L. Sadun

文献摘要

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摘要我们将Kellendonk和Putnam的模式等变(PE)上同调与平铺空间的逆极限结构联系起来。这给出了一个版本的PE上同调与整数系数,或与任何阿贝尔群的值。它还提供了一个简单的证明Kellendonk和Putnam的原始定理有关PE上同调的切赫上同调的平铺空间。逆极限结构还允许构造一个新的非阿贝尔不变量,即PE表示变量。
Abstract We relate Kellendonk and Putnam’s pattern-equivariant (PE) cohomology to the inverse-limit structure of a tiling space. This gives a version of PE cohomology with integer coefficients, or with values in any Abelian group. It also provides an easy proof of Kellendonk and Putnam’s original theorem relating PE cohomology to the Čech cohomology of the tiling space. The inverse-limit structure also allows for the construction of a new non-Abelian invariant, the PE representation variety.