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Problemy Fiziki, Matematiki i Tekhniki (Problems of Physics, Mathematics and Technics), 2009, Issue 1(1), Pages 64–68
(Mi pfmt211)
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MATHEMATICS
On reducible τ-closed ω-saturated formations with a soluble defect 2
V. G. Safonova, I. N. Safonovab a Ministry of Education of the Republic of Belarus, Minsk
b F. Skorina Gomel State University, Gomel
Abstract:
Let F be some τ-closed ω-saturated formation, S be the formation of all soluble groups. Then F/ωτF∩S denotes the lattice of all τ-closed ω-saturated formations H such that F∩S⊆H⊆F. A length of the lattice F/ωτF∩S is called a soluble lωτ-defect of the τ-closed ω-saturated formation F. The description of reducible τ-closed ω-saturated formations of finite groups with a soluble lωτ-defect 2 is obtained.
Keywords:
formation of finite groups, ω-saturated formation, defect of a formation, lattice of formations, τ-closed formation.
Received: 23.11.2009
Citation:
V. G. Safonov, I. N. Safonova, “On reducible τ-closed ω-saturated formations with a soluble defect 2”, PFMT, 2009, no. 1(1), 64–68
Linking options:
https://www.mathnet.ru/eng/pfmt211 https://www.mathnet.ru/eng/pfmt/y2009/i1/p64
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Abstract page: | 195 | Full-text PDF : | 70 | References: | 41 |
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