Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of #120 |
| automorphism | Aut(G) order 16384 |
| homology | Abelianization (H1) = C2×C42 · Schur multiplier (H2) = C22×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, Frattini, cosocle | C22×C4 | C23 |
| commutator | C22 | C2×C42 |
| socle, prime radical | C23 | C22×C4 |
| LCS | G ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C22×C4 ◁ G | |
| LECS | G ▷ C22×C4 ▷ C2 ▷ C1 | |
136 conjugacy classes of subgroups.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 128 |
A minimal faithful permutation representation — 3 generators on 20 points:
(5,6)(7,10)(8,9)(11,12)(13,14,15,18,16,17,19,20);(1,2,3,4)(6,9)(10,12);(5,7,8,11)(6,10,9,12)(14,17)(18,20)Polycyclic presentation:
2^7|a^2=e,b^2=f,c^2=d,e^2=g,b^a=bd,c^a=cg56 conjugacy classes — view the full character table.
| maximal subgroup of | #7023, #7043, #7048, … |
| maximal normal subgroup of | #7023, #7043, #7048, … |
| maximal quotient of | #8132, #8134, #8136, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 477);