Sinitsa, D.A.
(ДЗ "ЛНУ імені Тараса Шевченка", 2017)
Let G be a finite group. Recall that a subgroup A
of G is said to permute with a subgroup B if AB = BA. A subgroup
A of G is said to be S-quasinormal or S-permutable in G if A
permutes with all Sylow subgroups of G. ...