Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #99 |
| automorphism | Aut(G) = #72219693 (order 1024) · Inn(G) = C22⋊C4 · Out(G) = C2×#120 |
| homology | Abelianization (H1) = C4×C8 · Schur multiplier (H2) = C22 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center | C2×C4 | C22⋊C4 |
| commutator | C22 | C4×C8 |
| Frattini, cosocle | C2×C42 | C22 |
| socle | C22 | #95 |
| prime radical | C23 | C42 |
| LCS | G ▷ C22 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C2×C4 ◁ C2×C42 ◁ G | |
| LECS | G ▷ C2×C42 ▷ C22 ▷ C1 | |
80 conjugacy classes of subgroups.
| minimal degree | μ(G) = 16 |
| transitive degree | μt(G) = 64 |
A minimal faithful permutation representation — 2 generators on 16 points:
(1,2,3,6,4,5,7,8)(9,10,12,15,14,16,13,11);(2,5)(3,7)(9,11,13,16,14,15,12,10)Polycyclic presentation:
2^7|a^2=d,b^2=e,d^2=g,e^2=fg,b^a=bc,c^a=cf,d^b=df44 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#1283, #7932, #7933, … |
| maximal normal subgroup of | C2×#1283, #7932, #7933, … |
| maximal quotient of | #7016, #7022, #7023, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 15);