Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #327 |
| automorphism | Aut(G) = #72232274 (order 2048) · Inn(G) = C22⋊C4 · Out(G) = C2×D42 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center | C2×C4 | C22⋊C4 |
| commutator | C2×C4 | C22×C4 |
| Frattini, cosocle | C22×C4 | C23 |
| socle | C22 | C2×C22⋊C4 |
| prime radical | #532 | C2 |
| LCS | G ▷ C2×C4 ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C2×C4 ◁ C2×C42 ◁ G | |
| LECS | G ▷ C22×C4 ▷ C22 ▷ C1 | |
142 conjugacy classes of subgroups.
| minimal degree | μ(G) = 16 |
| transitive degree | μt(G) = 32 |
A minimal faithful permutation representation — 3 generators on 16 points:
(1,2)(3,5)(4,7)(6,8)(10,14,15,16);(2,5)(3,8)(6,7)(9,10)(11,14)(12,16)(13,15);(9,11,13,12)(10,14,15,16)Polycyclic presentation:
2^7|a^2=e,c^2=fg,d^2=g,b^a=bd,d^a=df,d^b=dg,e^b=efg38 conjugacy classes — view the full character table.
| maximal subgroup of | #8251, #8253, #8255, … |
| maximal normal subgroup of | #8251, #8253, #8255, … |
| maximal quotient of | #7560, #7569, #7570, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 234);