与其pro-$p$完备化具有相同上同调的群
群论
2010-09-16 v3 K理论与同调
摘要
对任意素数和群,记的pro-完备化为。设是所有满足如下条件的群的类:对每个自然数和素数,,其中被视为离散的平凡-模。本文我们识别了中的某些类型的群。特别地,我们证明了右角Artin群属于,并且该类也包含某些特殊类型的带合并的自由积。
引用
@article{arxiv.0809.3046,
title = {Groups with the same cohomology as their pro-$p$ completions},
author = {Karl Lorensen},
journal= {arXiv preprint arXiv:0809.3046},
year = {2010}
}
备注
The revisions in the second version pertain to the exposition: the proof of Prop. 1.1, in particular, now includes more details. The third version includes a proof that right-angled Artin groups are residually $p$-finite for every prime $p$