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On the Maximal Subgroups of $E_7(q)$ and Related Almost Simple Groups

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arxiv 2201.07081 v2 pith:PMQNFLWI submitted 2022-01-18 math.GR

classification math.GR
keywords maximalsubgroupsalmostpowerableadditionarbitraryclassifies
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abstract

This paper almost classifies the maximal subgroups of $E_7(q)$ for general $q$ a power of a prime $p$. Only four potential maximal subgroups are missing: $PSL_2(7)$ (unknown for $p\neq 2,3,7$), $PSL_2(8)$ ($p=2$) and $PSL_2(9)=A_6$ ($p\neq 2,3$). In addition, there is one issue with the precise structure with the positive-dimensional maximal subgroup of type $A_2$. We are able to give a complete determination of the maximal subgroups for $E_7(q)$ for $q$ an arbitrary power of $3$ and $q=4$.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On a generalisation of Cameron's base size conjecture

    math.GR 2025-11 conditional novelty 7.0 of 10

    Every 7-tuple of non-standard subgroups of a finite almost simple group has conjugates whose intersection is trivial — only M24 needs all seven.

  2. Finite simple groups have many classes of $p$-elements

    math.GR 2024-11 accept novelty 7.0 of 10

    For every finite nonabelian simple group T, the order |T| is bounded above by a function of m(T), the maximum number of Aut(T)-classes of p-elements over all primes p.

  3. Exceptional groups and the s-arc-transitivity of vertex-primitive digraphs, II

    math.GR 2026-07 conditional novelty 6.0 of 10

    For every almost simple group with socle E7(q) or E8(q), vertex-primitive s-arc-transitive digraphs satisfy s≤2, completing the exceptional-group case of the Giudici–Xia problem.

  4. Flag-transitive point-primitive quasi-symmetric $2$-designs and exceptional groups of Lie type

    math.CO 2025-06 conditional novelty 6.0 of 10

    For quasi-symmetric 2-designs with intersection numbers 0 and y between 2 and 10, the socle of any flag-transitive point-primitive automorphism group cannot be an exceptional group of Lie type.

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