A version of Brauer’s theorem for integer central functions

The article is dedicated to groups in which the set of abnormal and normal subgroups ( $U$ -subgroups) forms a lattice. A complete description of these groups under the additional restriction that every counternormal subgroup is abnormal is obtained.

Some results on $ℚ$ -groups

Mohammad Reza Darafsheh, H. Sharifi (2007)

Mathematica Slovaca

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On cover-avoiding subgroups of Sylow subgroups of finite groups

Yangming Li (2010)

Rendiconti del Seminario Matematico della Università di Padova

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