On the Galois group of 2-extensions with restricted ramification

On the Galois group of 2-extensions with restricted ramification
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关于具有受限分支的 2-扩展的伽罗瓦群

DOI:
10.1515/crll.2005.2005.581.117
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发表时间:
2005
期刊:
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影响因子:
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通讯作者:
Denis Vogel
Denis Vogel
中科院分区:
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文献类型:
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作者:
Denis Vogel

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摘要本文研究了给定素数集S外的极大素数的非派生2-扩展π(2)的伽罗瓦群与二次数域的2类域塔的伽罗瓦群的关系结构。完成了Morishita对π(2)的三重Milnor不变量的计算,得到了Zassenhaus滤波第四步中G(π (2) / π)模的关系结构。我们利用这个结果来推导二次数域的2类场塔的伽罗瓦群的信息。
Abstract In this paper we study the relation structure of the Galois group of the maximal outside a given set S of primes unramified 2-extension ℚ S (2) of ℚ and of the Galois group of the 2-class field tower of a quadratic number field. We complete Morishita’s calculations of the triple Milnor invariants for ℚ S (2) and obtain the relation structure of G(ℚ S (2) / ℚ) modulo the fourth step of the Zassenhaus filtration. We use this result in order to deduce information on the Galois group of the 2-class field tower of a quadratic number field.
关于结和素数之间的类比
DOI: --
发表时间: --
期刊: 3-manifolds and number rings, to appear in Sugaku Expositions, AMS
影响因子: --
作者:
M. Morishita;Y. Terashima;M. Morishita;M. Morishita
通讯作者: M. Morishita