maximal subgroup 20D10 4 Sylow subgroup 4 supersoluble group 3 20D20 2 finite group 2 2-maximal subgroup 1 20D15 1 20D30 1 20D40; 20E07 1 20E28 1 20F14 1 Hall \(S\)-permutably embedded subgroup 1 \(S\)-permutable closure 1 \(S\)-permutable subgroup 1 \(c\)-normal subgroup 1 \(c\)-permutable subgroup 1 \(p\)-supersolvable group 1 central product 1 factorization 1 normally embedded subgroup 1 p-nilpotent 1 sequence of subgroups 1 supplement 1 weakly s-permutably embedded subgroups 1