Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 4 |
| isoclinism | isoclinic class of #2184 |
| automorphism | Aut(G) = C2×#72237160 (order 2048) · Inn(G) = C2×D8 · Out(G) = C22×#41 |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C23 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | C2×D8 |
| commutator, Frattini, cosocle | C2×C8 | C23 |
| LCS | G ▷ C2×C8 ▷ C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C42 ◁ C4×C8 ◁ G | |
| LECS | G ▷ C2×C8 ▷ C4 ▷ C2 ▷ C1 | |
93 conjugacy classes of subgroups.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 64 |
A minimal faithful permutation representation — 3 generators on 20 points:
(2,4)(5,6)(7,10)(8,17)(9,13)(11,14)(12,15)(16,19)(18,20);(1,2,3,4);(6,10)(7,14)(8,15)(11,12)(13,19)(16,20)(17,18)Polycyclic presentation:
2^7|b^2=d,e^2=fg,f^2=g,b^a=bd,c^a=ce,e^a=ef,f^a=fg,e^c=ef,f^c=fg29 conjugacy classes — view the full character table.
| maximal subgroup of | #12316, #12319, #12324, … |
| maximal normal subgroup of | #12316, #12319, #12324, … |
| maximal quotient of | #12416, #12424, #12445, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 938);