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The special orthgonalorthogonal group ${\rm SO}_8$$\operatorname{SO}_8$ is the only
${\rm SO}_n$$\operatorname{SO}_n$ that has an outer automorphism of order $3$.
The special orthgonal group ${\rm SO}_8$ is the only
${\rm SO}_n$ that has an outer automorphism of order $3$.
The special orthogonal group $\operatorname{SO}_8$ is the only
$\operatorname{SO}_n$ that has an outer automorphism of order $3$.
