Abstract
Letk be a number field,p an odd prime,R k the ring ofp-integers ofk. We use Iwasawa theory to study theZ p -moduleG(R k ,Z p ) (resp.NB (R k ,Z p )) ofclasses ofZ p -extensions (resp.Z p -extensions having a normal basis overR k ) ofR k . The rank ofG(G k ,Z p ) (resp.NB(R k ,Z p )) is related to Leopoldt's conjecture (resp. weak Leopoldt's conjecture) fork andp.
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Fleckinger, V., Nguyen Quang Do, T. Bases normales, unités et conjecture faible de leopoldt. Manuscripta Math 71, 183–195 (1991). https://doi.org/10.1007/BF02568401
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DOI: https://doi.org/10.1007/BF02568401