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If $H$ is a subgroup of a group $G$, then the core of $H$ is \[ \bigcap_{g\in G} g^{-1} H g .\] It is the largest normal subgroup of $G$ contained in $H$.

Knowl status:
  • Review status: reviewed
  • Last edited by John Jones on 2019-03-21 09:42:48
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