Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of #2403 |
| 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 |
| prime radical | #392 | C2 |
| LCS | G ▷ C23 ▷ C1 | |
| UCS | C1 ◁ C23 ◁ G | |
| LECS | G ▷ C23 ▷ C1 | |
291 conjugacy classes of subgroups; only the 100 normal subgroups are shown.
This group has 291 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:
(2,4)(14,15)(16,20);(6,9)(10,12)(13,14,17,15)(16,18,20,19);(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,15,17,14)(16,19,20,18);(5,7,8,11)(6,10,9,12)(13,16)(14,18)(15,19)(17,20)Polycyclic presentation:
2^7|b^2=e,c^2=f,d^2=g,b^a=be,c^a=cf,d^a=de,c^b=cg38 conjugacy classes — view the full character table.
| maximal subgroup of | #18280, #18282, C2×#2603, … |
| maximal normal subgroup of | #18280, #18282, C2×#2603, … |
| maximal quotient of | #13952, #13959, #14075, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1335);