Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of #2403 |
| automorphism | Aut(G) order 8192 |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C23×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, commutator, Frattini, socle, cosocle | C23 | C24 |
| prime radical | C24 | C23 |
| LCS | G ▷ C23 ▷ C1 | |
| UCS | C1 ◁ C23 ◁ G | |
| LECS | G ▷ C23 ▷ C1 | |
238 conjugacy classes of subgroups; only the 104 normal subgroups are shown.
This group has 238 conjugacy classes of subgroups — too many to draw. Only its 104 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)(6,8)(7,11)(14,17)(15,19);(1,2,3,4)(5,6,9,8)(7,10,11,12)(13,14)(15,18)(16,17)(19,20);(1,2)(3,4)(5,7)(6,10)(8,12)(9,11);(5,8,9,6)(7,12,11,10)(13,15,16,19)(14,18,17,20)Polycyclic presentation:
2^7|a^2=g,b^2=f,d^2=e,b^a=be,c^a=cf,d^a=de,c^b=cg38 conjugacy classes — view the full character table.
| maximal subgroup of | #26721, #26725, #26728, … |
| maximal normal subgroup of | #26721, #26725, #26728, … |
| maximal quotient of | #13875, #13918, #13986, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1221);