{
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  "body": "\n## Summary\n\nIn mathematics, given a group $G$, a ***G*-module** is an [[abelian group|071DDFVG4J]] $M$ on which $G$ acts compatibly with the abelian group structure on $M$. This widely applicable notion generalizes that of a representation of $G$. Group (co)homology provides an important set of tools for studying general $G$-modules.\n",
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