Let $G$ be a group and $A$ be a $G$-module. I stumbled upon a term Central $G$-module in this paper. When do we say $A$ is Central? Any ideas will be helpful.
For the Definition of $G$-module you can refer to https://en.wikipedia.org/wiki/G-module
2026-04-13 12:33:13.1776083593
Central G-module
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It just means that the action is a scalar.