Unramified Subextensions of Ray Class Field Towers

Unramified Subextensions of Ray Class Field Towers
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雷级场塔的无分支延伸

DOI:
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
Christian Maire
Christian Maire
中科院分区:
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文献类型:
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作者:
F. Hajir;Christian Maire

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摘要固定一个素数l。在这篇文章中,我们探讨了数域的无限l-扩张中的分歧可以是“小”的各种意义。特别地,(1)我们构造了无穷多对素数p,q(不同于l),使得Q允许在{p,q}外的无限l-扩张非分歧;(2)我们探索了在数域的无限分歧l-扩张内找到无限非分歧子扩张的可能性。
Abstract Fix a prime l. In this paper, we explore various senses in which the ramification in an infinite l-extension of number fields can be “small.” In particular, (1) we construct infinitely many pairs of primes p, q (distinct from l) such that Q admits an infinite l-extension unramified outside {p, q}; and (2) we explore the possibility of finding infinite unramified subextensions inside infinite ramified l-extensions of number fields.