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arXiv 2407.01030math.AC
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Tame 域、分次环与关键多项式的有限完全序列

Tame fields, Graded Rings and Finite Complete Sequences of Key Polynomials

Caio Henrique Silva de Souza

AI总结:

本文借助 Mac Lane–Vaquié 链与抽象关键多项式,建立 henselian 无亏损判据,并证明 tame 域等价于值群 $p$-可除、剩余域完备且每个单代数扩张具有关键多项式有限完全序列。

摘要:

本文利用关键多项式的有限完全序列,给出了 $(K,v)$ 为 henselian 且无亏损的一个判据。为此,我们使用 Mac Lane–Vaquié 链和抽象关键多项式理论。随后证明,赋值域 $(K,v)$ 是 tame 的,当且仅当 $vK$ 是 $p$-可除的、$Kv$ 是完备的,并且 $K$ 的每个单代数扩张都容许一个关键多项式的有限完全序列。$vK$ 的 $p$-可除性与 $Kv$ 的完备性通过相伴分次环上的 Frobenius 自同态加以刻画。我们还讨论了单纯无亏损、代数极大赋值域以及纯惯性扩张和纯分歧扩张。

英文摘要:

In this paper, we present a criterion for $(K,v)$ to be henselian and defectless in terms of finite complete sequences of key polynomials. For this, we use the theory of Mac Lane-Vaquié chains and abstract key polynomials. We then prove that a valued field $(K,v)$ is tame if and only if $vK$ is $p$-divisible, $Kv$ is perfect and every simple algebraic extension of $K$ admits a finite complete sequence of key polynomials. The properties $vK$ $p$-divisible and $Kv$ perfect are described by the Frobenius endomorphism on the associated graded ring. We also make considerations on simply defectless and algebraically maximal valued fields and purely inertial and purely ramified extensions.

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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