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Criteria for solubility and nilpotency of finite groups with automorphisms (2206.03403v2)

Published 7 Jun 2022 in math.GR

Abstract: Let $G$ be a finite group admitting a coprime automorphism $\alpha$. Let $J_G(\alpha)$ denote the set of all commutators $[x,\alpha]$, where $x$ belongs to an $\alpha$-invariant Sylow subgroup of $G$. We show that $[G,\alpha]$ is soluble or nilpotent if and only if any subgroup generated by a pair of elements of coprime orders from the set $J_G(\alpha)$ is soluble or nilpotent, respectively.

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