On the structure of abelian profinite groups

María V. Ferrer, Salvador Hernández

A subgroup $G$ of a product $\prod _{i\in \mathbb{N}}{G}_i$ is \emph{rectangular} if there are subgroups $H_i$ of $G_i$ such that $G=\prod _{i\in \mathbb{N}}{H}_i$. We say th…