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If $H$ is a subgroup of a group $G$, the normal closure of $H$ is the smallest normal subgroup of $G$ containing $H$. Alternatively, it is the subgroup generated by the set $$\bigcup_{g\in G} gHg^{-1}.$$

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• Review status: beta
• Last edited by John Jones on 2019-06-10 15:54:02
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