Abstract:
All groups considered in this paper are assumed to be finite. The symbol ω denotes some nonempty set of primes, and τ 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:ω∪{ω′}→{formations of groups} are called ω-local satellites (formation ω-functions). Such functions are used to study the structure of ω-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 τ, the lattice lτω∞ of all τ-closed totally ω-saturated formations is algebraic. This generalizes the results by V.G. Safonov. In particular, we show that the lattice lτp∞ of all τ-closed totally p-saturated formations is algebraic as well as the lattice lτ∞ of all τ-closed totally saturated formations. Similar results are obtained for lattices of functorially closed totally partially saturated formations corresponding to certain subgroup functors τ. Thus, we find new classes of algebraic lattices of formations of finite groups.
Keywords:
formation of finite groups, totally ω-saturated formation, lattice of formations, τ-closed formation, algebraic lattice.
\Bibitem{Shc20}
\by V.~V.~Shcherbina
\paper Algebraicity of lattice of $\tau$-closed totally $\omega$-saturated formations of finite groups
\jour Ufa Math. J.
\yr 2020
\vol 12
\issue 1
\pages 82--90
\mathnet{http://mi.mathnet.ru/eng/ufa504}
\crossref{https://doi.org/10.13108/2020-12-1-82}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000526181300006}
Linking options:
https://www.mathnet.ru/eng/ufa504
https://doi.org/10.13108/2020-12-1-82
https://www.mathnet.ru/eng/ufa/v12/i1/p83
This publication is cited in the following 5 articles:
Haiyan Li, A.-Ming Liu, Inna N. Safonova, Alexander N. Skiba, “Characterizations of some classes of finite
σ
-soluble
PσT
-groups”, Communications in Algebra, 52:1 (2024), 128
N. Yan, N. N. Vorobev, I. I. Staselko, “O modulyarnosti i algebraichnosti reshetki kratno ω-kompozitsionnykh klassov Fittinga”, Izv. vuzov. Matem., 2023, no. 4, 76–88
N. Yang, N. N. Vorob'ev, I. I. Staselka, “On the Modularity and Algebraicity of the Lattice of Multiply ω-Composition Fitting Classes”, Russ Math., 67:4 (2023), 66
N. N. Vorob'ev, “On the modularity of the lattice of Baer-σ-local formations”, Vescì Akademìì navuk Belarusì. Seryâ fizika-matematyčnyh navuk, 59:1 (2023), 7
N. N. Vorobev, “O modulyarnosti reshetki berovskikh n-kratno σ-lokalnykh formatsii”, Algebra i logika, 62:4 (2023), 458–478