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If $H$ is a subgroup of a group $G$, then the normalizer of $H$ is the subgroup $N_G(H) = \{ g\in G\mid gHg^{-1} = H\}.$ Equivalently, this is the largest subgroup of $G$ containing $H$ in which $H$ is normal.

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• Review status: beta
• Last edited by John Jones on 2019-06-10 17:23:22
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