A counterexample to the HK-conjecture that is principal
A counterexample to the HK-conjecture that is principal
复制标题
主要 HK 猜想的反例
DOI:
10.1017/etds.2022.25
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发表时间:
2023
影响因子:
0.9
通讯作者:
DEELEY, ROBIN J.
中科院分区:
文献类型:
--
作者:
DEELEY, ROBIN J.
Scarparo has constructed counterexamples to Matui’s HK-conjecture. These counterexamples and other known counterexamples are essentially principal but not principal. In the present paper, a counterexample to the HK-conjecture that is principal is given. Like Scarparo’s original counterexample, our counterexample is the transformation groupoid associated to a particular odometer. However, the relevant group is the fundamental group of a flat manifold (and hence is torsion-free) and the associated odometer action is free. The examples discussed here do satisfy the rational version of the HK-conjecture.
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