arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2207.07623math.AG
收藏

$G$-torsors on perfectoid spaces

$G$-torsors on perfectoid spaces

Leibniz University Hannover(汉诺威莱布尼茨大学)

Ben Heuer

AI总结:

研究非阿基米德域上刚性解析群簇$G$在完美空间上的$v$-拓扑$G$-torsors,证明在完美空间上平展与$v$-拓扑的$G$-torsors等价,并推广了Scholze和Kedlaya-Liu的已知结果。

摘要:

对于任意在$\mathbb Q_p$上的非阿基米德域$K$上的刚性解析群簇$G$,我们在$v$-拓扑下研究$K$上adic空间上的$G$-torsors。我们的主要结果是,在完美空间上,平展拓扑和$v$-拓扑下的$G$-torsors是等价的。这推广了Scholze和Kedlaya-Liu关于$G=\mathbb G_a$和$G=\mathrm{GL}_n$的已知情况。在一般的$K$上adic空间$X$上,可能存在比平展$G$-torsors更多的$v$-拓扑$G$-torsors,我们证明对于任何开子群$U\subseteq G$,$X_v$上的任何$G$-torsor在$X$的平展局部上允许结构群约化为$U$。这在$p$-adic Simpson对应的背景下有应用:例如,我们用它证明在任何adic空间上,广义的$\mathbb Q_p$-表示等价于$v$-向量丛。

英文摘要:

For any rigid analytic group variety $G$ over a non-archimedean field $K$ over $\mathbb Q_p$, we study $G$-torsors on adic spaces over $K$ in the $v$-topology. Our main result is that on perfectoid spaces, $G$-torsors in the étale and $v$-topology are equivalent. This generalises the known cases of $G=\mathbb G_a$ and $G=\mathrm{GL}_n$ due to Scholze and Kedlaya--Liu. On a general adic space $X$ over $K$, where there can be more $v$-topological $G$-torsors than étale ones, we show that for any open subgroup $U\subseteq G$, any $G$-torsor on $X_v$ admits a reduction of structure group to $U$ étale-locally on $X$. This has applications in the context of the $p$-adic Simpson correspondence: For example, we use it to show that on any adic space, generalised $\mathbb Q_p$-representations are equivalent to $v$-vector bundles.

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。

↑