On signed Mordell-Weil groups for abelian varieties
Abstract
In this short note, we work in the general framework of supersingular abelian varieties defined over . Using Coleman maps constructed by B\"uy\"ukboduk--Lei, we define some objects called ``the multi-signed Mordell-Weil groups" for supersingular abelian varieties, make comments on the structure of the dual of these groups as an Iwasawa module and show a (weak) control theorem. This recovers the case of elliptic curves over non-ordinary at the prime with studied by Antonio Lei. Using the multi-signed Mordell-Weil groups we define what we call ``the multi-signed Tate-Shafarevich groups" along the cyclotomic tower of . Finally we pose some open questions related to our newly defined objects and make a remark on the asymptotic growth of these multi-signed Tate-Shafarevich groups along the cyclotomic tower using an idea of Meng Fai Lim.
Cite
@article{arxiv.2304.13452,
title = {On signed Mordell-Weil groups for abelian varieties},
author = {Jishnu Ray},
journal= {arXiv preprint arXiv:2304.13452},
year = {2025}
}
Comments
To appear in Conference proceedings of ICCGNFRT (International Conference on Class Groups of Number Fields and Related Topics)