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Unit indices of imaginary abelian number fields of type (2, 2, 2)

โœ Scribed by Mikihito Hirabayashi; Ken-ichi Yoshino


Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
588 KB
Volume
34
Category
Article
ISSN
0022-314X

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๐Ÿ“œ SIMILAR VOLUMES


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Let k be an imaginary abelian number field whose conductor has at most two distinct prime divisors and whose maximal subfields which are ramified at one prime are imaginary. We shall find a basis for the group C of circular units in k and compute the index of C in the group E of units in k.

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Assume that \(K\) is either a totally real or a totally imaginary number field. Let \(F\) be the maximal unramified elementary abelian 2-extension of \(K\) and \([F: K]=2^{n}\). The purpose of this paper is to describe a family of cubic cyclic extension of \(K\). We have constructed an unramified ab

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Let k be an imaginary quadratic number field with C k, 2 , the 2-Sylow subgroup of its ideal class group, isomorphic to Zร‚2Z\_Zร‚2Z\_Zร‚2Z. By the use of various versions of the Kuroda class number formula, we improve significantly upon our previous lower bound for |C k 1 , 2 | , the 2-class number of