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arXiv 1302.3499math.GR
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具有核为循环p-群的自同构的弗罗贝尼乌斯群的有限p-群

Finite p-groups with a Frobenius group of automorphisms whose kernel is a cyclic p-group

E. I. Khukhro, N. Yu. Makarenko

摘要:

设有限$p$ -群$P$允许一个由自同构$FH$构成的弗罗贝尼乌斯群,其核$F$是循环的$p$ -群,并有补$H$ .证明了若补的不动点子群$C_P(H)$是类$c$的幂零子群,则$P$有一个指数关于$c$,$|C_P(F)|$和$|F|$有界的特征子群,其幂零类仅关于$c$和$|H|$有界.实例表明,$F$是环状的条件是必不可少的.证明是基于一个李环的方法和一个定理的作者和P. Shumyatsky关于李环的亚循环弗罗贝尼乌斯群的自同构$FH$。还证明了$P$有一个特征子群,其阶和秩分别以$|H|$和$C_P(H)$的阶和秩为界,其指数以$C_P(H)$的指数为界,其指数为$(|C_P(F)|, |F|)$有界指数.

英文摘要:

Suppose that a finite $p$-group $P$ admits a Frobenius group of automorphisms $FH$ with kernel $F$ that is a cyclic $p$-group and with complement $H$. It is proved that if the fixed-point subgroup $C_P(H)$ of the complement is nilpotent of class $c$, then $P$ has a characteristic subgroup of index bounded in terms of $c$, $|C_P(F)|$, and $|F|$ whose nilpotency class is bounded in terms of $c$ and $|H|$ only. Examples show that the condition of $F$ being cyclic is essential. The proof is based on a Lie ring method and a theorem of the authors and P. Shumyatsky about Lie rings with a metacyclic Frobenius group of automorphisms $FH$. It is also proved that $P$ has a characteristic subgroup of $(|C_P(F)|, |F|)$-bounded index whose order and rank are bounded in terms of $|H|$ and the order and rank of $C_P(H)$, respectively, and whose exponent is bounded in terms of the exponent of $C_P(H)$.

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