arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.4886math.GR
收藏

不含SIL的积图的自同构群

The automorphism group of a graph product with no SIL

Ruth Charney, Kim Ruane, Nathaniel Stambaugh, Anna Vijayan

摘要:

研究了循环群的图积的自同构,循环群是一类包含所有直角Coxeter群和直角Artin群的群。我们证明了部分共轭生成的自同构群本身是循环群的图积,只要它的定义图不包含任何分离的链交(SIL)。在所有的循环群都是有限的情况下,这意味着自同构群实际上是CAT(0);它有一个有限的指数子群,它几何地作用在一个直角建筑物上。

英文摘要:

We study the automorphisms of graph products of cyclic groups, a class of groups that includes all right-angled Coxeter and right-angled Artin groups. We show that the group of automorphism generated by partial conjugations is itself a graph product of cyclic groups providing its defining graph does not contain any separating intersection of links (SIL). In the case that all the cyclic groups are finite, this implies that the automorphism group is virtually CAT(0); it has a finite index subgroup which acts geometrically on a right-angled building.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑