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arXiv math/0009024math.NTmath.GR
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惯性群的辛表示

Symplectic representations of inertia groups

A. Silverberg, Yu. G. Zarhin

摘要:

假设$\ell$是素数,$\ell >3$,$K$是$\ell$-adic数域$\Q_\ell$的非分歧有限扩张的域,$G$是正规$\ell'$ -子群$H$和循环$\ell$ -群$L$的半直积的有限群.假设群代数$K[H]$是可分解的.如果对于某个正整数$d$,存在$G$在辛群$\Sp_{2d}(K)$中的嵌入,则存在$G$在$\Sp_{2d}({\mathcal O}_K)$中的嵌入,其中${\mathcal O}_K$是$K$的整数环。

英文摘要:

Suppose $\ell$ is a prime number, $\ell >3$, $K$ is a field that is an unramified finite extension of the field $\Q_\ell$ of $\ell$-adic numbers, and $G$ is a finite group that is a semi-direct product of a normal $\ell'$-subgroup $H$ and a cyclic $\ell$-group $L$. Suppose that the group algebra $K[H]$ is decomposable. If there exists an embedding of $G$ in the symplectic group $\Sp_{2d}(K)$ for some positive integer $d$, then there exists an embedding of $G$ in $\Sp_{2d}({\mathcal O}_K)$, where ${\mathcal O}_K$ is the ring of integers of $K$.

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。

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