Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of D42 |
| automorphism | Aut(G) = C22×#72232847 (order 8192) · Inn(G) = C24 · Out(G) = C24×#120 |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C23×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, Frattini, socle, cosocle | C23 | C24 |
| commutator | C22 | C23×C4 |
| prime radical | C22×D4 | C22 |
| LCS | G ▷ C22 ▷ C1 | |
| UCS | C1 ◁ C23 ◁ G | |
| LECS | G ▷ C23 ▷ C1 | |
294 conjugacy classes of subgroups; only the 144 normal subgroups are shown.
This group has 294 conjugacy classes of subgroups — too many to draw. Only its 144 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) = 64 |
A minimal faithful permutation representation — 4 generators on 20 points:
(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,19)(16,18)(17,20);(6,9)(10,12)(13,14,16,18)(15,17,20,19);(5,7,8,11)(6,10,9,12)(13,15)(14,17)(16,20)(18,19);(5,6)(7,10)(8,9)(11,12)(13,14)(15,17)(16,18)(19,20)Polycyclic presentation:
2^7|a^2=g,b^2=f,c^2=ef,b^a=be,c^a=cf,d^b=de50 conjugacy classes — view the full character table.
| maximal subgroup of | #8762, #8763, #8772, … |
| maximal normal subgroup of | #8762, #8763, #8772, … |
| maximal quotient of | #13802, #13806, #13807, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1085);