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Invariant subgroup

From Encyclopedia of Mathematics
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The same as a normal subgroup, that is, a subgroup $H$ of a group $G$ that is taken to itself under any inner automorphism of $G$.

How to Cite This Entry:
Invariant subgroup. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Invariant_subgroup&oldid=16417