Maximality of hyperspecial compact subgroups avoiding Bruhat-Tits theory
Maximality of hyperspecial compact subgroups avoiding Bruhat-Tits theory
复制标题
避免 Bruhat-Tits 理论的超特殊紧子群的极大性
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
Marco Maculan
中科院分区:
文献类型:
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作者:
Marco Maculan
Let $k$ be a complete non-archimedean field (non trivially valued). Given a reductive $k$-group $G$, we prove that hyperspecial subgroups of $G(k)$ (i.e. those arising from reductive models of $G$) are maximal among bounded subgroups. The originality resides in the argument: it is inspired by the case of $ extrm{GL}_n$ and avoids all considerations on the Bruhat-Tits building of $G$.