论文标题

关于确切的分区,$ 5 $的班级数量的一些纯Metacyclic字段数

On the exact divisibility by $5$ of the class number of some pure metacyclic fields

论文作者

Elmouhib, Fouad, Talbi, Mohamed, Azizi, Abdelmalek

论文摘要

令$γ\,= \,\ Mathbb {q}(\ sqrt [5] {n})$是一个纯五重奏字段,其中$ n $是自然数量$ 5^{th} $无功能。令$ k = \ mathbb {q}(\ sqrt [5] {n},ζ_5)$,使用$ζ_5$是单位的原始$ 5^​​{th} $,是$γ$的正常闭合,而纯度的Metacyclic Field和$ 20 $ $ 20 $ $ \ MATHBBBB的纯Metacyclic领域。当$ n $采用某些特定表格时,我们表明$γ$承认一个微不足道的$ 5 $级别的组,$ 5 $将$ k $的班级数完全划分。

Let $Γ\,=\, \mathbb{Q}(\sqrt[5]{n})$ be a pure quintic field, where $n$ is a natural number $5^{th}$ power-free. Let $k = \mathbb{Q}(\sqrt[5]{n}, ζ_5)$, with $ζ_5$ is a primitive $5^{th}$ root of unit, be the normal closure of $Γ$, and a pure metacyclic field of degree $20$ over $\mathbb{Q}$. When $n$ takes some particular forms, we show that $Γ$ admits a trivial $5$-class group and $5$ divides exactly the class number of $k$.

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