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This research proves that the 10th term of the derived series of maximal subgroups is perfect in almost simple groups, indicating a strong structural property.
We prove that, if G is a finite almost simple group and H is a maximal subgroup of G , then the 10th term of the derived series of H is perfect. The same is true if G is perfect and H is core-free. The constant 10 is best possible.
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Capilla et al. (2026) studied this question.
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