Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #3057 |
| automorphism | Aut(G) order 2048 |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C25 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | C22×D4 |
| commutator, Frattini, cosocle | C2×C4 | C24 |
| prime radical | #537 | C2 |
| LCS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C2×#41 ◁ G | |
| LECS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
236 conjugacy classes of subgroups; only the 100 normal subgroups are shown.
This group has 236 conjugacy classes of subgroups — too many to draw. Only its 100 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)(5,6,10,14)(7,15,17,18)(8,12,11,20)(9,16,19,13);(5,7,9,12,10,17,19,20)(6,11,13,15,14,8,16,18);(2,4)(5,8)(6,12)(7,16)(9,18)(10,11)(13,17)(14,20)(15,19);(7,17)(8,11)(12,20)(15,18)Polycyclic presentation:
2^7|a^2=g,b^2=e,e^2=g,b^a=be,c^a=cf,e^a=eg,d^b=dg,d^c=dg32 conjugacy classes — view the full character table.
| maximal subgroup of | #25190, #25191, #25194, … |
| maximal normal subgroup of | #25190, #25191, #25194, … |
| maximal quotient of | #19231, #19233, #19235, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1795);