For a wide family of formations a it is proved that the a-residual of a permutation finite group can be computed in polynomial time. Moreover, if in the previous case a is hereditary, then the a -subnormality of a sub...
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For a wide family of formations a it is proved that the a-residual of a permutation finite group can be computed in polynomial time. Moreover, if in the previous case a is hereditary, then the a -subnormality of a subgroup can be checked in polynomial time.(c) 2023 Elsevier Ltd. All rights reserved.
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