Finite Group DatabasebetaFinite Group Databasebeta| order | 440 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of D4 |
| automorphism | Aut(G) = C2×C4×C5×D4 (order 320) · Inn(G) = C22 · Out(G) = C22×C4×C5 |
| homology | Abelianization (H1) = C22×C5×C11 · Schur multiplier (H2) = C2 |
| direct product | C5×D4×C11 |
| unambiguous semidirect product | C4⋊(C2×C5×C11) |
| unambiguous semidirect product | C22⋊(C2×C5×C11) |
| subgroup | G/H | |
|---|---|---|
| center, socle | C2×C5×C11 | C22 |
| commutator, Frattini, cosocle | C2 | C22×C5×C11 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C2×C5×C11 ◁ G | |
32 conjugacy classes of subgroups.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 220 |
A minimal faithful permutation representation — 2 generators on 20 points:
(1,2,3,4,5)(6,7,8,9)(10,11,12,13,14,15,16,17,18,19,20);(7,9)275 conjugacy classes. The character table is too large to display.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(440, 40);