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arXiv 2301.09720math.NT
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一般局部可约二维伽罗瓦表示的Serre权包

Packets of Serre weights for generic locally reducible two-dimensional Galois representations

Misja F. A. Steinmetz

摘要:

设$K/\mathbb{Q}_p$是有限的,$\overline{r}\colon G_K\to \mathrm{GL}_2(\overline{\mathbb{F}}_p)$是可约伽罗瓦表示.本文证明了在$\overline{r}$是弱泛型的假设下,可以利用作者在[Ste 22]中的结果得到Serre权集$W(\overline{r})$分解为至多$(e+1)^f$权“包”的不交并(其中$f$是$K$的剩余度,$e$是$K$的分歧度).从而,在假定$\overline{r}$是强一般的条件下,改进了文献[DS 15]中Diamond-Savitt给出类似分解的结果,用不同的方法.我们表明,我们的弱泛型的定义是最佳的,本文的结果举行时,$e=1$。然而,我们预计,对于$e=2$本文的主要结果之一仍然保持较弱的假设比本文中使用的。

英文摘要:

Suppose $K/\mathbb{Q}_p$ is finite and $\overline{r}\colon G_K\to \mathrm{GL}_2(\overline{\mathbb{F}}_p)$ is a reducible Galois representation. In this paper we prove that we can use the results by the author in [Ste22] to obtain a decomposition of the set of Serre weights $W(\overline{r})$ into a disjoint union of at most $(e+1)^f$ 'packets' of weights (where $f$ is the residue degree and $e$ the ramification degree of $K$) under the assumption that $\overline{r}$ is weakly generic. Thereby, we improve on results of Diamond--Savitt in [DS15] which give a similar decomposition, by rather different methods, under the assumption that $\overline{r}$ is strongly generic. We show that our definition of weak genericity is optimal for the results of this paper to hold when $e=1$. However, we expect that for $e=2$ one of the main results of this paper still holds under weaker hypotheses than the ones used in this paper.

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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