Let G be a group, and let α be a regular automorphism of order p2 of G, where p is a prime. If G is polycyclic-by-finite and the map φ: G → G defined by gφ = [g, α] is surjective, then G is soluble. If G is polycyclic, then CG(αp) and G/[G, αp] are both nilpotent-by-finite.
机构:
Capital Normal Univ, Sch Math Sci, Inst Math & Interdisciplinary Sci, Beijing 100048, Peoples R ChinaCapital Normal Univ, Sch Math Sci, Inst Math & Interdisciplinary Sci, Beijing 100048, Peoples R China
Du, Shao-Fei
Kwak, Jin Ho
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机构:
Pohang Univ Sci & Technol, Dept Math, Pohang 790784, South KoreaCapital Normal Univ, Sch Math Sci, Inst Math & Interdisciplinary Sci, Beijing 100048, Peoples R China