Unramified Subextensions of Ray Class Field Towers
Unramified Subextensions of Ray Class Field Towers
复制标题
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
中科院分区:
文献类型:
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作者:
F. Hajir;Christian Maire
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.