Remarks on unit indices of imaginary abelian number fields II
- Cite this article as:
- Hirabayashi, M. & Yoshino, K. Manuscripta Math (1989) 64: 235. doi:10.1007/BF01160122
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Satz 41 in Hasse's monograph  is modified because of the incorrectness of Satz 29. We investigate unit indices of imaginary abelian number fields of type (2,2) and (2,2, 2), some of which give counterexamples to Satz 41. We moreover give a relation between unit indices of certain imaginary fields of type (2,22) and those of their real cyclic subfields.