Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #327 |
| automorphism | Aut(G) = #1202 (order 1024) · Inn(G) = C22⋊C4 · Out(G) = C2×#120 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center | C2×C4 | C22⋊C4 |
| commutator | C2×C4 | C22×C4 |
| Frattini, cosocle | C42 | C23 |
| socle | C22 | C2×C22⋊C4 |
| prime radical | #121 | C4 |
| LCS | G ▷ C2×C4 ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C2×C4 ◁ C2×C42 ◁ G | |
| LECS | G ▷ C42 ▷ C22 ▷ C1 | |
117 conjugacy classes of subgroups.
| minimal degree | μ(G) = 16 |
| transitive degree | μt(G) = 64 |
A minimal faithful permutation representation — 3 generators on 16 points:
(2,5,6,7)(9,10,13,16,14,11,12,15);(1,2)(3,7)(4,6)(5,8)(9,11)(10,14)(12,16)(13,15);(9,12,14,13)(10,15,11,16)Polycyclic presentation:
2^7|a^2=e,c^2=f,d^2=g,e^2=f,b^a=bd,d^a=df,d^b=dg,e^b=efg38 conjugacy classes — view the full character table.
| maximal subgroup of | #8247, #8248, #8249, … |
| maximal normal subgroup of | #8247, #8248, #8249, … |
| maximal quotient of | #7560, #7562, #7565, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 256);