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arXiv 1802.06208math.NT
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数域上离散赋值的推广

On the Extensions of a Discrete Valuation in a Number Field

Abdulaziz Deajim, Lhoussain El Fadil

摘要:

设$K$是由一元不可约多项式$F(X) \in \mathbb{Z}[X]$定义的数域,$p$是固定的有理素数,$ν_p$是与$p$相关联的离散赋值。假设$\overline{F}(X)$将模$p$因子化为$r$不同一元不可约多项式的幂的乘积。本文给出了一个比已知条件弱的条件,它保证了$K$扩展$ν_p$的$r$赋值的存在性.我们进一步指定的分歧指数和剩余度,这些扩展的估值在这样一种方式,推广已知的估计。给出了一些有用的注释和计算实例,以突出由于我们的结果的一些改进。

英文摘要:

Let $K$ be a number field defined by a monic irreducible polynomial $F(X) \in \mathbb{Z}[X]$, $p$ a fixed rational prime, and $ν_p$ the discrete valuation associated to $p$. Assume that $\overline{F}(X)$ factors modulo $p$ into the product of powers of $r$ distinct monic irreducible polynomials. We present in this paper a condition, weaker than the known ones, which guarantees the existence of exactly $r$ valuations of $K$ extending $ν_p$. We further specify the ramification indices and residue degrees of these extended valuations in such a way that generalizes the known estimates. Some useful remarks and computational examples are also given to highlight some improvements due to our result.

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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