The iwasawa invariant μ in the composite of two Zl-extensions
The iwasawa invariant μ in the composite of two Zl-extensions
复制标题
两个 Zl 扩展复合中的 iwasawa 不变量 μ
DOI:
10.1016/0022-314x(81)90009-3
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发表时间:
1981
影响因子:
0.7
通讯作者:
F. Gerth
中科院分区:
文献类型:
--
作者:
John R Bloom;F. Gerth
Let k 0 be a finite extension field of the rational numbers, and assume k 0 has at least two Z l-extensions. Assume that at least one Z l-extension K k 0 has Iwasawa invariant μ= 0, and let L be the composite of K and some other Z l-extension of k 0. In this paper we find an upper bound for the number of Z l-extensions of k 0 contained in L with nonzero μ.