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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 $\tau$-closed $\omega$-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 $\mathfrak F$ be some $\tau$-closed $\omega$-saturated formation, $\mathfrak S$ be the formation of all soluble groups. Then $\mathfrak F/^{\omega}_{\tau}\mathfrak F \cap \mathfrak S$ denotes the lattice of all $\tau$-closed $\omega$-saturated formations $\mathfrak H$ such that $\mathfrak F \cap \mathfrak S \subseteq \mathfrak H \subseteq \mathfrak F$. A length of the lattice $\mathfrak F/^{\omega}_{\tau}\mathfrak F \cap \mathfrak S$ is called a soluble $l^{\omega}_{\tau}$-defect of the $\tau$-closed $\omega$-saturated formation $\mathfrak F$. The description of reducible $\tau$-closed $\omega$-saturated formations of finite groups with a soluble $l^{\omega}{\tau}$-defect 2 is obtained.
Keywords:
formation of finite groups, $\omega$-saturated formation, defect of a formation, lattice of formations, $\tau$-closed formation.
Received: 23.11.2009
Citation:
V. G. Safonov, I. N. Safonova, “On reducible $\tau$-closed $\omega$-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: | 162 | Full-text PDF : | 64 | References: | 36 |
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