Abstract
Let K be an imaginary abelian number field. We determine the unit index of K of certain type whose conductor is a product of two or three prime powers. As a consequence we construct some counterexamples to Satz 29 in Hasse's monograph [2].
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References
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Hirabayashi, M., Yoshino, Ki. Remarks on unit indices of imaginary abelian number fields. Manuscripta Math 60, 423–436 (1988). https://doi.org/10.1007/BF01258662
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DOI: https://doi.org/10.1007/BF01258662