Abstract
Let \({\mathfrak {X}}\) be a class of simple groups with a completeness property \(\pi ({\mathfrak {X}}) = \mathrm {char} \, \mathfrak X\). Förster introduced the concept of \({\mathfrak {X}}\)-local formation in order to obtain a common extension of well-known theorems of Gaschütz–Lubeseder–Schmid and Baer (Publ Mat Univ Autònoma Barcelona, 29(2–3), 1985). In the present paper, it is proved that the lattice of all \({\mathfrak {X}}\)-local formations of finite groups is algebraic.
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Acknowledgements
This work was partially supported by the Belarusian Republican Foundation for Fundamental Research (BRFFI–RFFI M-20017, Grant F17RM-063). The author thanks the anonymous referees for many insightful comments that have greatly contributed to this paper.
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Tsarev, A. Algebraic lattices of partially saturated formations of finite groups. Afr. Mat. 31, 701–707 (2020). https://doi.org/10.1007/s13370-019-00753-5
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DOI: https://doi.org/10.1007/s13370-019-00753-5
Keywords
- Finite group
- Formation of groups
- \({\mathfrak {X}}\)-Formation function
- \({\mathfrak {X}}\)-Local satellite of the formation
- \({\mathfrak {X}}\)-Local formation
- Local formation
- Composition formation
- Compact element
- Algebraic lattice