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Problemy Fiziki, Matematiki i Tekhniki (Problems of Physics, Mathematics and Technics), 2009, Issue 1(1), Pages 64–68 (Mi pfmt211)  

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
References:
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
Document Type: Article
UDC: 519.542
Language: Russian
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
Citation in format AMSBIB
\Bibitem{SafSaf09}
\by V.~G.~Safonov, I.~N.~Safonova
\paper On reducible $\tau$-closed $\omega$-saturated formations with a soluble defect 2
\jour PFMT
\yr 2009
\issue 1(1)
\pages 64--68
\mathnet{http://mi.mathnet.ru/pfmt211}
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    Проблемы физики, математики и техники
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