Geodesic
On one generalization of Baer's theorems about hypercenter and nilpotent residual
Problemy fiziki, matematiki i tehniki, no. 3 (2013), pp. 84-88 Cet article a éte moissonné depuis la source Math-Net.Ru

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Let $\mathfrak{F}$ be a class of finite groups which are the direct products of their Hall $\pi_i$-subgroups corresponding to a given partition $\sigma=\{\pi_i|i\in I, i\ne j\rightarrow\pi_i\cap\pi_j=\varnothing\}$ of a nonempty subset $\pi$ of the set of all primes. This class is a local formation. In this paper the properties of $\mathfrak{F}$-hypercenter and $\mathfrak{F}$-residual of a finite group are studied. It was shown that for a finite $\pi$-group $G$ the intersection of all normalizers of all maximal $\pi_i$-subgroups for all $i$ is the $\mathfrak{F}$-hypercenter of $G$. As corollaries were obtained well-known properties of hypercenter and nilpotent residual of finite groups.
Keywords: finite group, formation of finite groups, $\mathfrak{F}$-hypercenter, $\mathfrak{F}$-residual.
Mots-clés : local formation 
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     author = {V. I. Murashka},
     title = {On one generalization of {Baer's} theorems about hypercenter and nilpotent residual},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {84--88},
     year = {2013},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2013_3_a13/}
}
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V. I. Murashka. On one generalization of Baer's theorems about hypercenter and nilpotent residual. Problemy fiziki, matematiki i tehniki, no. 3 (2013), pp. 84-88. http://geodesic.mathdoc.fr/item/PFMT_2013_3_a13/

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