Geodesic
Finite groups with restrictions on two maximal subgroups
Problemy fiziki, matematiki i tehniki, no. 3 (2019), pp. 88-92.

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A subgroup $A$ of a group $G$ is called seminormal in $G$, if there exists a subgroup $B$ such that $G = AB$ and $AB_1$ is a proper subgroup of $G$ for every proper subgroup $B_1$ of $B$. We introduce the new concept that unites subnormality and seminormality. A subgroup $A$ of a group $G$ is called semisubnormal in $G$, if either $A$ is subnormal in $G$, or is seminormal in $G$. In this paper we proved the supersolubility of a group $G$ under the condition that all Sylow subgroups of two non-conjugate maximal subgroups of $G$ are semisubnormal in $G$. Also we obtained the nilpotency of the second derived subgroup $(G')'$ of a group $G$ under the condition that all maximal subgroups of two non-conjugate maximal subgroups are semisubnormal in $G$.
Keywords: supersoluble groups, semisubnormal subgroup, derived subgroup, Sylow subgroup, maximal subgroup. 
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V. S. Monakhov; A. A. Trofimuk; E. V. Zubei. Finite groups with restrictions on two maximal subgroups. Problemy fiziki, matematiki i tehniki, no. 3 (2019), pp. 88-92. http://geodesic.mathdoc.fr/item/PFMT_2019_3_a14/

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