Additive subgroups of a module that are saturated with respect to a subset of the ring

Jesse Elliott, Neil Epstein

Let $T$ be a subset of a ring $A$, and let $M$ be an $A$-module. We study the additive subgroups $F$ of $M$ such that, for all $x\in M$, if $tx\in F$ for some $t\in T$, then $x…