On Local Automorphisms of sl2

We establish that the set of local automorphisms $\textrm{LAut}(\mathfrak{sl}_2)$ is the group $\textrm{Aut}^{\pm}(\mathfrak{sl}_2)$ of all automorphisms and anti-automorphisms. For $n\geq 3$ we prove that anti-automorphisms are local automorphisms of $\mathfrak{sl}_n$.

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