UHF-代数上圆周作用的等变高阶Dixmier-Douady理论
算子代数
2023-11-27 v2 代数拓扑
摘要
我们为纤维为且配备逐纤维-作用的-代数局部平凡丛发展了等变Dixmier-Douady理论,其中表示圆周群,且对于-表示,。特别地,我们证明了-等变-自同构群是一个无穷环空间,产生上同调理论。等变丛的同构类在逐纤维张量积下形成一个群,该群同构于。我们计算了环面的该群,并将的情形与底空间上平凡作用的等变Brauer群进行了比较。
引用
@article{arxiv.2201.13364,
title = {Equivariant higher Dixmier-Douady Theory for circle actions on UHF-algebras},
author = {David E. Evans and Ulrich Pennig},
journal= {arXiv preprint arXiv:2201.13364},
year = {2023}
}
备注
37 pages, published version (except for a typo in the description of the order structure on page 19 and the proof of Lemma 3.5, which was fixed after publication, and did not change the main result)