由自由作用线性范畴进行消解及其在Hochschild-Mitchell(上)同调中的应用
K理论与同调
2021-11-09 v2 环与代数
表示论
摘要
设为作用于域上小范畴的群,即是一个--范畴。我们首先得到可由一个与之--等价、且在其对象上自由作用的范畴所消解。该消解范畴可用来证明:若余不变与不变函子正合,则的Hochschild-Mitchell(上)同调的余不变与不变同构于斜范畴的Hochschild-Mitchell(上)同调的平凡分量;否则可建立相应的谱序列。若在对象上自由作用,则商范畴的Hochschild-Mitchell(上)同调沿的共轭类有典范分解。由此我们为先前在低次描述的单射提供了一个一般框架。
引用
@article{arxiv.2009.09251,
title = {Resolving by a free action linear category and applications to Hochschild-Mitchell (co)homology},
author = {Claude Cibils and Eduardo N. Marcos},
journal= {arXiv preprint arXiv:2009.09251},
year = {2021}
}
备注
This version is improved after referee comments. This article differs from a previous article which has been withdrawn. The main point now is the resolving category. In addition, this work contains new results. It has been improved and reorganized. This article supersedes arXiv:1804.02223