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added 10 characters in body

edited Sep 18, 2022 at 20:33

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Norton and Wilson - Maximal subgroups of the Harada–Norton group seems to imply that $\mathrm {HN} \rtimes C_2$ works, along with its overgroups $\mathbb{B}$ and $\mathbb{M}$.

answered Sep 18, 2022 at 20:27

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