Ideal class groups of cyclotomic number fields I

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Ideal Class Groups of Cyclotomic Number Fields I

Following Hasse’s example, various authors have been deriving divisibility properties of minus class numbers of cyclotomic fields by carefully examining the analytic class number formula. In this paper we will show how to generalize these results to CM-fields by using class field theory. Although we will only need some special cases, we have also decided to include a few results on Hasse’s unit...

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Ideal Class Groups of Cyclotomic Number Fields Ii

We first study some families of maximal real subfields of cyclotomic fields with even class number, and then explore the implications of large plus class numbers of cyclotomic fields. We also discuss capitulation of the minus part and the behaviour of p-class groups in cyclic ramified p-extensions. This is a continuation of [13]; parts I and II are independent, but will be used in part III. 6. ...

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Exponents of the ideal class groups of CM number fields

Since class numbers of CM number fields of a given degree go to infinity with the absolute values of their discriminants, it is reasonable to ask whether the same conclusion still holds true for the exponents of their ideal class groups. We prove that under the assumption of the Generalized Riemann Hypothesis this is indeed the case. 1991 Mathematics Subject Classification. Primary 11R29, 11R21.

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ژورنال

عنوان ژورنال: Acta Arithmetica

سال: 1995

ISSN: 0065-1036,1730-6264

DOI: 10.4064/aa-72-4-347-359