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An almost simple group is a group $G$ that lies between a non-abelian simple group $S$ and its automorphism group Aut$(S)$, i.e. $S \subseteq G \subseteq$Aut$(S).$

Every non-abelian simple group is almost simple, but it is not implied by $G$ being quasisimple, as shown by these examples.

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• Last edited by John Jones on 2022-05-18 20:15:58
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