Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of #2812 |
| automorphism | Aut(G) = C22×#72232847 (order 8192) · Inn(G) = C24 · Out(G) = #6342371 |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C23×C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, commutator, Frattini, socle, cosocle | C23 | C24 |
| LCS | G ▷ C23 ▷ C1 | |
| UCS | C1 ◁ C23 ◁ G | |
| LECS | G ▷ C23 ▷ C1 | |
289 conjugacy classes of subgroups; only the 92 normal subgroups are shown.
This group has 289 conjugacy classes of subgroups — too many to draw. Only its 92 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:
(6,9)(10,12)(13,14,16,17)(15,18,20,19);(2,4)(6,9)(7,11)(14,17)(18,19);(1,2)(3,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,19)(16,17)(18,20);(5,7)(6,10)(8,11)(9,12)(13,15)(14,18)(16,20)(17,19)Polycyclic presentation:
2^7|a^2=e,b^a=be,c^a=cf,c^b=cg,d^b=def,d^c=de26 conjugacy classes — view the full character table.
| maximal subgroup of | #18446, #18448, C2×#2813, … |
| maximal normal subgroup of | #18446, #18448, C2×#2813, … |
| maximal quotient of | #14621, #14622, #14623, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1545);