A particular type of automorphism group which exists only for groups. For a group , the outer automorphism group is the quotient group , which is the automorphism group of modulo its inner automorphism group.
Outer Automorphism Group
See alsoAutomorphism Group, Inner Automorphism Group, Quotient Group
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Cite this as:
Weisstein, Eric W. "Outer Automorphism Group." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/OuterAutomorphismGroup.html