Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #1665 |
| automorphism | Aut(G) = C24×D42 (order 1024) · Inn(G) = #121 · Out(G) = C25 |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C2 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle, prime radical | C22 | #121 |
| commutator, Frattini, cosocle | C42 | C23 |
| LCS | G ▷ C42 ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C42 ◁ G | |
| LECS | G ▷ C42 ▷ C22 ▷ C1 | |
75 conjugacy classes of subgroups.
| minimal degree | μ(G) = 24 |
| transitive degree | μt(G) = 128 |
A minimal faithful permutation representation — 3 generators on 24 points:
(1,2,5,7)(3,8,6,4)(9,10)(11,17)(12,14)(13,21)(15,19)(16,20)(18,24)(22,23);(1,3,4,2,5,6,8,7)(10,14)(15,23)(16,21)(17,24);(9,11,12,18)(10,15,14,23)(13,22,20,19)(16,24,21,17)Polycyclic presentation:
2^7|a^2=f,b^2=dg,c^2=g,d^2=f,e^2=g,b^a=bd,c^a=ce,d^a=df,e^a=eg,e^c=eg29 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#1680, #19123, #19124, … |
| maximal normal subgroup of | C2×#1680, #19123, #19124, … |
| maximal quotient of | #8647, #9218, #9220, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 412);