If $G$ is a group and $H$ is a subgroup of $G$, then the **centralizer** of $H$ in $G$ is
\[ C_G(H) = \{g\in G\mid gh=hg \text{ for all } h\in H\}.\]

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- Review status: reviewed
- Last edited by John Jones on 2018-07-10 14:39:21

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- 2018-07-10 14:39:21 by John Jones (Reviewed)