maximal subgroup 7 20D10 5 Sylow subgroup 4 20D20 3 supersoluble group 3 20D15 2 20E28 2 finite group 2 2-maximal subgroup 1 20D30 1 20D40; 20E07 1 20E07 1 20E32 1 20E34 1 20F14 1 Hall \(S\)-permutably embedded subgroup 1 \(S\)-permutable closure 1 \(S\)-permutable subgroup 1 \(\cal F\) -critical group,\(\cal F\) -maximal subgroup 1 \(\cal F\)-hypercentre 1 \(c\)-normal subgroup 1 \(c\)-permutable subgroup 1 \(p\)-supersolvable group 1 boundary condition 1 central product 1 cofactors 1 factorization 1 hereditary formation 1 insoluble groups 1 maximal subgroup growth 1