Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #1655 |
| automorphism | Aut(G) = #72233211 (order 3072) · Inn(G) = #120 · Out(G) = GL(2,ℤ/4) |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | #120 |
| commutator, Frattini, cosocle | C42 | C23 |
| LCS | G ▷ C42 ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C42 ◁ G | |
| LECS | G ▷ C42 ▷ C22 ▷ C1 | |
131 conjugacy classes of subgroups.
| minimal degree | μ(G) = 16 |
| transitive degree | μt(G) = 32 |
A minimal faithful permutation representation — 3 generators on 16 points:
(2,6)(3,4)(7,8)(10,13)(11,15)(14,16);(1,2)(3,8)(4,6)(5,7)(9,10)(11,16)(12,14)(13,15);(1,2)(3,6)(4,8)(5,7)(11,15)(13,16)Polycyclic presentation:
2^7|d^2=f,e^2=fg,b^a=bd,c^a=ce,d^a=df,e^a=efg,d^b=df,e^b=eg,d^c=dg,e^c=efg20 conjugacy classes — view the full character table.
| Fitting subgroup of | #1655⋊C3, #11711670 |
| maximal subgroup of | #13677, C2×#1655, #18984, … |
| maximal normal subgroup of | #13677, C2×#1655, #18984, … |
| maximal quotient of | #7734, #7742, #7745, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 387);