A negative answer to a question of Aschbacher
classification
🧮 math.GR
keywords
aschbacherlatticeovergroupsquestionansweranswersbooleanconjugate
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We give infinitely many examples to show that even for simple groups $G$ it is possible for the lattice of overgroups of a subgroup $H$ to be the Boolean lattice of rank $2$, in such a way that the two maximal overgroups of $H$ are conjugate in $G$. This answers negatively a question posed by Aschbacher.
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