Finite Group DatabasebetaFinite Group Databasebeta| order | 128 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of #3008 |
| automorphism | Aut(G) order 4096 |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C26 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | C22×D4 |
| commutator, Frattini, cosocle | C2×C4 | C24 |
| prime radical | C2×H(5,𝔽2) | C2 |
| LCS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C2×#41 ◁ G | |
| LECS | G ▷ C2×C4 ▷ C2 ▷ C1 | |
376 conjugacy classes of subgroups; only the 108 normal subgroups are shown.
This group has 376 conjugacy classes of subgroups — too many to draw. Only its 108 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) = 32 |
A minimal faithful permutation representation — 4 generators on 20 points:
(1,2)(3,4)(5,6,9,13)(7,11,14,18)(8,10,16,12)(15,17,20,19);(6,10)(8,16)(11,17)(12,13)(15,20)(18,19);(2,4)(5,7)(6,11)(8,15)(9,14)(10,17)(12,19)(13,18)(16,20);(7,14)(11,18)(15,20)(17,19)Polycyclic presentation:
2^7|a^2=g,e^2=g,b^a=be,c^a=cf,e^a=eg,e^b=eg,d^c=dg32 conjugacy classes — view the full character table.
| maximal subgroup of | #13097, #13100, #23894, … |
| maximal normal subgroup of | #13097, #13100, #23894, … |
| maximal quotient of | #18225, #18233, #18241, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(128, 1741);