Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #2002 |
| automorphism | Aut(G) = #72236620 (order 2048) · Inn(G) = #120 · Out(G) = C23×D4 |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C24 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | #120 |
| commutator, Frattini, cosocle | C22×C4 | C23 |
| prime radical | C2×#41 | C22 |
| LCS | G ▷ C22×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C22×C4 ◁ G | |
| LECS | G ▷ C22×C4 ▷ C2 ▷ C1 | |
181 conjugacy classes of subgroups; only the 46 normal subgroups are shown.
This group has 181 conjugacy classes of subgroups — too many to draw. Only its 46 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)(7,15)(8,12)(9,18)(10,14)(11,16)(13,19)(17,20);(5,7,10,8)(6,11,14,20)(9,17,19,16)(12,18,15,13);(2,4)(5,8,10,7)(6,12,14,15)(9,16,19,17)(11,13,20,18)Polycyclic presentation:
2^7|b^2=g,c^2=g,d^2=g,b^a=bd,c^a=ce,d^a=dg,f^a=fg,c^b=cf,d^b=dg,d^c=dg26 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#2005, #23399, #23401, … |
| maximal normal subgroup of | C2×#2005, #23399, #23401, … |
| maximal quotient of | #9917, #9919, #9925, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 737);