Finite Group DatabasebetaFinite Group DatabasebetaOrder 126.
18 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C3×ΓL(1,𝔽8) | C2 | 1 | 1 | yes | maximal, characteristic, complemented, Hall |
| 2 | D21 | C3 | 1 | 1 | yes | maximal, characteristic, complemented |
| 3 | AGL(1,𝔽7) | — | 3 | 1 | no | maximal |
| 4 | C3×C7 | C2×C3 | 1 | 1 | yes | characteristic, complemented |
| 5 | ΓL(1,𝔽8) | — | 2 | 1 | no | — |
| 6 | ΓL(1,𝔽8) | D3 | 1 | 1 | yes | characteristic, complemented |
| 7 | C3×D3 | — | 7 | 1 | no | maximal, Hall |
| 8 | D7 | — | 3 | 1 | no | Hall |
| 9 | C32 | — | 7 | 1 | no | Sylow |
| 10 | C7 | C3×D3 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 11 | C2×C3 | — | 21 | 1 | no | — |
| 12 | D3 | — | 7 | 1 | no | — |
| 13 | C3 | — | 7 | 1 | no | — |
| 14 | C3 | — | 14 | 1 | no | — |
| 15 | C3 | AGL(1,𝔽7) | 1 | 1 | yes | characteristic, complemented |
| 16 | C2 | — | 21 | 1 | no | Sylow |
| subgroup | G/H | |
|---|---|---|
| center, Frattini, hypercenter | C1 | G |
| commutator, Fitting, socle, cosocle, hypocenter | C3×C7 | C2×C3 |
| LCS | G ▷ C3×C7 | |
| UCS | C1 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C3×ΓL(1,𝔽8) | C2 | semidirect |
| 2. D21 | C3 | semidirect |
| 4. C3×C7 | C2×C3 | semidirect |
| 6. ΓL(1,𝔽8) | D3 | semidirect |
| 10. C7 | C3×D3 | semidirect |
| 15. C3 | AGL(1,𝔽7) | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C3×ΓL(1,𝔽8) | 2 |
| D21 | 3 |
| AGL(1,𝔽7) | 3 |
| C3×D3 | 7 |