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This article is cited in 5 scientific papers (total in 5 papers)
Algebraicity of lattice of $\tau$-closed totally $\omega$-saturated formations of finite groups
V. V. Shcherbina Belorus State University, Nezavisimosti av. 4, 220030, Minsk, Republic of Belorus
Abstract:
All groups considered in this paper are assumed to be finite. The symbol $\omega$ denotes some nonempty set of primes, and $\tau$ is a subgroup functor in the sense of A.N. Skiba. We recall that a formation is a class of groups that is closed under taking homomorphic images and finite subdirect products. Functions of the form $f:\omega\cup\{\omega'\}\to\{\text{formations of groups}\}$ are called $\omega$-local satellites (formation $\omega$-functions). Such functions are used to study the structure of $\omega$-saturated formations.
The paper is devoted to studying the properties of the lattice of all closed functorially totally partially saturated formations related to the algebraicity concept for a lattice of formations. We prove that for each subgroup functor $\tau$, the lattice $l_{\omega_{\infty}}^{\tau}$ of all $\tau$-closed totally $\omega$-saturated formations is algebraic. This generalizes the results by V.G. Safonov. In particular, we show that the lattice $l_{p_{\infty}}^{\tau}$ of all $\tau$-closed totally $p$-saturated formations is algebraic as well as the lattice $l_{\infty}^{\tau}$ of all $\tau$-closed totally saturated formations. Similar results are obtained for lattices of functorially closed totally partially saturated formations corresponding to certain subgroup functors $\tau$. Thus, we find new classes of algebraic lattices of formations of finite groups.
Keywords:
formation of finite groups, totally $\omega$-saturated formation, lattice of formations, $\tau$-closed formation, algebraic lattice.
Received: 12.04.2019
Citation:
V. V. Shcherbina, “Algebraicity of lattice of $\tau$-closed totally $\omega$-saturated formations of finite groups”, Ufa Math. J., 12:1 (2020), 82–90
Linking options:
https://www.mathnet.ru/eng/ufa504https://doi.org/10.13108/2020-12-1-82 https://www.mathnet.ru/eng/ufa/v12/i1/p83
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Abstract page: | 223 | Russian version PDF: | 82 | English version PDF: | 12 | References: | 26 |
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