Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #3057 |
| automorphism | Aut(G) order 8192 |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C24×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | C22×D4 |
| commutator, Frattini, cosocle | C2×C4 | C24 |
| LCS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ #117 ◁ G | |
| LECS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
298 conjugacy classes of subgroups; only the 108 normal subgroups are shown.
This group has 298 conjugacy classes of subgroups — too many to draw. Only its 108 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 32 |
A minimal faithful permutation representation — 4 generators on 20 points:
(2,4)(6,10)(8,11)(12,16)(13,17)(15,18)(19,20);(5,6,11,17,9,13,8,10)(7,12,18,20,14,19,15,16);(1,2,3,4)(5,7)(6,12)(8,15)(9,14)(10,16)(11,18)(13,19)(17,20);(7,14)(12,19)(15,18)(16,20)Polycyclic presentation:
2^7|b^2=eg,c^2=f,e^2=g,b^a=be,c^a=cf,e^a=eg,d^c=dg32 conjugacy classes — view the full character table.
| maximal subgroup of | #13215, #13334, #13336, … |
| maximal normal subgroup of | #13215, #13334, #13336, … |
| maximal quotient of | #19623, #19627, #19629, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1887);