arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1703.05076math.AGmath.RT
收藏

简单代数群中的复杂性$c$对

Complexity $c$ Pairs in Simple Algebraic Groups

Mahir Bilen Can

摘要:

我们称一个连通约化代数群$G$中的闭子群对$(G_1,G_2)$为{\it复杂度$c$对},如果这对子群对在$G$上的乘法作用具有复杂度$c$.本文主要关注$G$为简单值且$c$为0或1的情况。在证明除非$c>1$,否则子群$G_1$和$G_2$都不能是还原子群之后,我们寻找子群$G_1$和$G_2$中恰好有一个是还原子群的情况。事实证明,只有少数这样的对,它们的分类涉及小秩的准球面齐性空间。作为一个副产品的循环的想法,我们使用这种发展,我们得到的分类的对角球面行动的简单代数群的产品旗品种与仿射齐性空间。

英文摘要:

We call a pair of closed subgroups $(G_1,G_2)$ from a connected reductive algebraic group $G$ a {\it complexity $c$ pair} if the multiplication action of the pair on $G$ is of complexity $c$. The main focus of this article is on the cases where $G$ is simple and $c$ is either 0 or 1. After showing that both of the subgroups $G_1$ and $G_2$ cannot be reductive subgroups unless $c>1$, we look for the cases where exactly one of the subgroups $G_1$ and $G_2$ is reductive. It turns out that there are only a few such pairs, and their classification involves the horospherical homogeneous spaces of small ranks. As a byproduct of the circle of ideas that we use for this development, we obtain the classification of the diagonal spherical actions of simple algebraic groups on the products of flag varieties with affine homogeneous spaces.

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。

↑