学術雑誌論文 On a duality of Gras between totally positive and primary cyclotomic units

Ichimura, Humio

58 ( 1 )  , pp.125 - 132 , 2016-01 , Department of Mathematics, Faculty of Science, Okayama University
ISSN:0030-1566
NII書誌ID(NCID):AA00723502
内容記述
Let K be a real abelian field of odd degree over Q, and C the group of cyclotomic units of K. We denote by C+ and C0 the totally positive and primary elements of C, respectively. G. Gras found a duality between the Galois modules C+/C2 and C0/C2 by some ingenious calculation on cyclotomic units. We give an alternative proof using a consequence (=“Gras conjecture”) of the Iwasawa main conjecture and the standard reflection argument. We also give some related topics.
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http://ousar.lib.okayama-u.ac.jp/files/public/5/53920/20160528121625533245/mjou_058_125_132.pdf

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