Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #447 |
| automorphism | Aut(G) order 4096 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C23 | C2×D4 |
| commutator | C2×C4 | C22×C4 |
| Frattini, cosocle | C22×C4 | C23 |
| prime radical | C24 | D4 |
| LCS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C23 ◁ C23×C4 ◁ G | |
| LECS | G ▷ C22×C4 ▷ C2 ▷ C1 | |
150 conjugacy classes of subgroups.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 64 |
A minimal faithful permutation representation — 3 generators on 20 points:
(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(14,17)(15,18)(19,20);(6,9)(10,12)(13,14,16,17)(15,18,19,20);(5,7,8,11)(6,10,9,12)(13,15,16,19)(14,18,17,20)Polycyclic presentation:
2^7|a^2=f,b^2=g,c^2=d,e^2=g,b^a=bd,c^a=ce,e^a=eg,e^c=eg38 conjugacy classes — view the full character table.
| maximal subgroup of | #8466, #8468, #9346, … |
| maximal normal subgroup of | #8466, #8468, #9346, … |
| maximal quotient of | #8708, #8711, #8714, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 557);