What is the automorphism group of the symmetric group of degree three? From what I understand, the automorphism group of $Sym(n)$, with $n \neq 2$ or $6$ is 'trivial'. But I don't understand what trivial means in this case, is it that the automorphism group of $Sym(n) =$ the identity element?
Automorphism group of the symmetric group of degree three
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group-theory