On the 1-part of the Z_p_l×…X Z_p_s-extension of Q

On the 1-part of the Z_p_l×…X Z_p_s-extension of Q
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关于 Q 的 Z_p_l×…X Z_p_s-扩展的 1-部分

DOI:
10.1016/j.jnt.2012.09.017
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发表时间:
2013
期刊:
J. Number Theory
影响因子:
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通讯作者:
T. Morisawa
T. Morisawa
中科院分区:
--
文献类型:
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作者:
S.Mizukami;M.Hosoda;T.Satake;S.Okada;Y.Hori;T.Furuta;K.Kikuchi;Makoto Taniguchi;Satoshi Okada;矢倉 裕奈;岡田智;矢倉 裕奈;Satoshi Okada;矢倉裕奈;Satoshi Okada;武谷浩之;Satoshi Okada;林輝;矢倉裕奈;Satoshi Okada;林輝;矢倉裕奈;林輝;T. Morisawa

文献摘要

相似文献

设S是一个非空的有限素数集,QS是一个阿贝尔数域,其Galois群拓扑同构于S中所有p的p-adic整数环的直积.我们用Ω S表示Pn阶分圆域的合成,其中p是S中的所有p,n是所有正整数。设Ω是一个不在S中的素数,我们定义了一个显式常数G Ω(S,F),它只依赖于S和Ω在Q上的分解域F.若G ≠ G(S,F),则G ≠ G(S,F)不整除Q上有限次的中间域的类数.我们的证明改进了Horie的方法。
Let S be a non-empty finite set of prime numbers and QSthe abelian number field whose Galois group is topologically isomorphic to the direct product of the p-adic integer rings for all p in S. We denote by ΩSthe composite of pn-th cyclotomic fields for all p in S and all positive integers n. Let ℓ be a prime number which is not in S and we define an explicit constant G˜(S,F) which depends only on S and the decomposition field F of ℓ for ΩSover Q. Then ℓ does not divide the class numbers of all intermediate fields of QSwith finite degree over Q if ℓ is greater than G˜(S,F). Our proof refines Horieʼs method.