Structure of (Fine) Mordell--Weil Groups (2507.20341v1)

Abstract: In this article we study the algebraic structure of fine Mordell--Weil groups and plus/minus Mordell--Weil groups in the cyclotomic $\mathbb{Z}_p$-extensions of number fields. We provide refinements of previously known results and also prove some equivariant results. In particular, we are able to give stronger results even when the base field is $\mathbb{Q}$.