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arXiv 1708.03014math.RTmath.NT
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$p$-adic $\textrm{GL}_n$的mod-$p$主列的第一pro-$p$-Iwahori上同调

The first pro-$p$-Iwahori cohomology of mod-$p$ principal series for $p$-adic $\textrm{GL}_n$

Karol Koziol

摘要:

设$p\geq 3$为素数,$F$为$p$ -adic域.令$I_1$表示$\textrm{GL}_n(F)$的pro-$p$-Iwahori子群,$\mathcal{H}$表示$\textrm{GL}_n(F)$关于$I_1$的pro-$p$-Iwahori-Hecke代数(在特征为$p$的系数域上).我们将$\textrm{H}^1(I_1,π)$的结构计算为$\mathcal{H}$ -模块,其中$π$是$\textrm{GL}_n(F)$的mod-$p$主列表示。我们还给出了具有不可约根系的一般可裂可约群的$\textrm{H}^1(I_1,π)$的结构的部分结果。

英文摘要:

Let $p\geq 3$ be a prime number and $F$ a $p$-adic field. Let $I_1$ denote the pro-$p$-Iwahori subgroup of $\textrm{GL}_n(F)$, and $\mathcal{H}$ the pro-$p$-Iwahori--Hecke algebra of $\textrm{GL}_n(F)$ with respect to $I_1$ (over a coefficient field of characteristic $p$). We compute the structure of $\textrm{H}^1(I_1,π)$ as an $\mathcal{H}$-module, where $π$ is a mod-$p$ principal series representation of $\textrm{GL}_n(F)$. We also give some partial results about the structure of $\textrm{H}^1(I_1,π)$ for a general split reductive group with irreducible root system.

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