## normal subgroup

subgroup invariant under conjugation

ProofWiki: Definition:Normal_SubgroupMathWorld: NormalSubgroup

Encyclopedia of Mathematics: Normal_subgroup

Wikipedia (English): Normal_subgroup

Wikidata: normal subgroup

nLab: normal subgroup

**mathswitch** — infrastructure for relaying and exchanging mathematical concepts

subgroup invariant under conjugation

ProofWiki: Definition:Normal_SubgroupMathWorld: NormalSubgroup

Encyclopedia of Mathematics: Normal_subgroup

Wikipedia (English): Normal_subgroup

Wikidata: normal subgroup

nLab: normal subgroup