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:
影响因子:
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通讯作者:
Denis Vogel
中科院分区:
文献类型:
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作者:
Denis Vogel
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.
DOI:
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发表时间:
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期刊:
3-manifolds and number rings, to appear in Sugaku Expositions, AMS
影响因子:
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作者:
M. Morishita;Y. Terashima;M. Morishita;M. Morishita
通讯作者:
M. Morishita