Finite submodules of Iwasawa modules for multi-variable extensions
Finite submodules of Iwasawa modules for multi-variable extensions
复制标题
用于多变量扩展的 Iwasawa 模块的有限子模块
DOI:
10.1016/j.jnt.2021.12.003
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发表时间:
2021
影响因子:
0.7
通讯作者:
Kataoka Takenori
中科院分区:
文献类型:
--
作者:
Greither Cornelius;Kataoka Takenori;Kurihara Masato;Kataoka Takenori
For multi-variable extensions of number fields, we study the maximal finite submodules of classical Iwasawa modules. Our principal objects are the unramified Iwasawa modules for two-variable extensions of imaginary quadratic fields. On the one hand, we obtain a novel way to show a certain upper bound, or even the vanishing, of the maximal finite submodules. On the other hand, we obtain a sufficient condition for the non-vanishing, and then construct numerical examples for which the non-vanishing holds.