Geodesic
On finite semi-$p$-decomposable groups
Problemy fiziki, matematiki i tehniki, no. 1 (2018), pp. 41-44.

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A finite group $G$ is called $p$-decomposable if $G=O_{p'}(G)\times O_p(G)$. We say that a finite group $G$ is semi-$p$-decomposable if the normalizer of every non-normal $p$-decomposable subgroup of $G$ is $p$-decomposable. We prove the following Theorem. Suppose that a finite group $G$ is semi-$p$-decomposable. If a Sylow $p$-subgroup $P$ of $G$ is not normal in $G$, then the following conditions hold: (i) $G$ is $p$-soluble and $G$ has a normal Hall $p'$-subgroup $H$. (ii) $G/F(G)$ is $p$-decomposable. (iii) $O_{p'}(G)\times O_p(G)=H\times Z_\infty(G)$ is a maximal $p$-decomposable subgroup of $G$, and $G/H\times Z_\infty(G)$ is abelian.
Keywords: finite group, Sylow subgroup, Hall subgroup.
Mots-clés : $p$-soluble group, $p$-decomposable group 
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N. M. Adarchenko; I. V. Bliznets; V. N. Rizhik. On finite semi-$p$-decomposable groups. Problemy fiziki, matematiki i tehniki, no. 1 (2018), pp. 41-44. http://geodesic.mathdoc.fr/item/PFMT_2018_1_a6/

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