Difference between revisions of "Normal subgroup"
(New page: <noinclude>Status::Basic definitionTopic::Group theoryPrimary wiki::Groupprops</noinclude> '''Normal subgroup''': A subgroup of a group that occurs as the kernel of a homomorp...) 
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Revision as of 16:20, 14 May 2008
:Basic definitionGroup theoryGroupprops Normal subgroup: A subgroup of a group that occurs as the kernel of a homomorphism, or equivalently, such that every left coset and right coset are equal.
Related terms: Normality (the property of a subgroup being normal), normal core (the largest normal subgroup contained in a given subgroup), normal closure (the smallest normal subgroup containing a given subgroup), normalizer (the largest subgroup containing a given subgroup, in which it is normal).
Term variations: subnormal subgroup, abnormal subgroup, quasinormal subgroup, and others. See Groupprops:Category:Variations of normality, Groupprops:Category:Opposites of normality, and Groupprops:Category:Analogues of normality.
Primary subject wiki entry: Groupprops:Normal subgroup
Other subject wiki entries: Diffgeom:Normal subgroup
Also located at: Wikipedia:Normal subgroup, Planetmath:NormalSubgroup, Mathworld:NormalSubgroup, Sor:N/n067690, Normal subgroup