The lattice of solid -subgroups of a retractable group
Richard D. Byrd, Justin T. Lloyd, Roberto A. Mena, J. Roger Teller (1978)
Czechoslovak Mathematical Journal
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Richard D. Byrd, Justin T. Lloyd, Roberto A. Mena, J. Roger Teller (1978)
Czechoslovak Mathematical Journal
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Jiří Rachůnek (1979)
Mathematica Slovaca
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Richard D. Byrd (1968)
Czechoslovak Mathematical Journal
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de Falco, M., de Giovanni, F. (2001)
Serdica Mathematical Journal
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A subgroup H of a group G is said to be quasinormal if HX = XH for all subgroups X of G. In this article groups are characterized for which the partially ordered set of quasinormal subgroups is decomposable.
Leonid A. Kurdachenko, Igor Ya. Subbotin (2007)
Commentationes Mathematicae Universitatis Carolinae
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The article is dedicated to groups in which the set of abnormal and normal subgroups (-subgroups) forms a lattice. A complete description of these groups under the additional restriction that every counternormal subgroup is abnormal is obtained.