Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #1468 |
| automorphism | Aut(G) = #72236522 (order 2048) · Inn(G) = C2×C22⋊C4 · Out(G) = #392 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C23×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | C2×C22⋊C4 |
| commutator | C23 | C22×C4 |
| Frattini, cosocle | C24 | C23 |
| prime radical | C22×D4 | C22 |
| LCS | G ▷ C23 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C23×C4 ◁ G | |
| LECS | G ▷ C24 ▷ C2 ▷ C1 | |
189 conjugacy classes of subgroups; only the 56 normal subgroups are shown.
This group has 189 conjugacy classes of subgroups — too many to draw. Only its 56 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 32 |
A minimal faithful permutation representation — 3 generators on 20 points:
(1,2)(3,4)(5,6)(7,10,14,17)(8,11)(9,12)(13,16,19,20)(15,18);(5,7)(6,10,12,17)(8,13)(9,14)(11,16,18,20)(15,19);(2,4)(5,8,9,15)(6,11,12,18)(7,13,14,19)(10,16,17,20)Polycyclic presentation:
2^7|a^2=f,b^2=df,c^2=g,b^a=bd,c^a=ce,d^a=dg,d^b=dg,f^b=fg32 conjugacy classes — view the full character table.
| maximal subgroup of | #8487, #8488, C2×#1899, … |
| maximal normal subgroup of | #8487, #8488, C2×#1899, … |
| maximal quotient of | #9080, #9082, #9084, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 631);