Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #453 |
| automorphism | Aut(G) = C24×D42 (order 1024) · Inn(G) = #120 · Out(G) = C25 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C24 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | #120 |
| commutator | C2×C4 | C22×C4 |
| Frattini, cosocle | C22×C4 | C23 |
| prime radical | C2×#41 | C22 |
| LCS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C22×C4 ◁ G | |
| LECS | G ▷ C22×C4 ▷ C2 ▷ C1 | |
167 conjugacy classes of subgroups; only the 56 normal subgroups are shown.
This group has 167 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:
(2,4)(5,6,9,13,10,14,8,12)(7,15,17,11,18,19,16,20);(1,2,3,4)(5,7)(6,11)(8,17)(9,16)(10,18)(12,19)(13,15)(14,20);(5,7)(6,11)(8,16)(9,17)(10,18)(12,15)(13,19)(14,20)Polycyclic presentation:
2^7|a^2=f,b^2=df,d^2=g,e^2=g,f^2=g,b^a=bd,c^a=ce,e^a=eg,d^b=dg,f^b=fg,e^c=eg32 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#1882, #20942, #20943, … |
| maximal normal subgroup of | C2×#1882, #20942, #20943, … |
| maximal quotient of | #8953, #8955, #8971, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 614);