Finite Group Databasebeta

D21×C22⋊A4 #72244764

order2016
automorphism?
homologyAbelianization (H1) = C2×C3 · Schur multiplier (H2) = C24

Aliases

direct productD21×C22⋊A4

Splittings

Fitting, socle, derivedC24×C3×C7 ⋊ C2×C3
SylowC7 ⋊ D3×C22⋊A4

Subgroups

subgroupG/H
center, Frattini, hypercenterC1G
commutator, Fitting, socle, cosocle, hypocenterC24×C3×C7C2×C3
LCSG ▷ C24×C3×C7
UCSC1

606 conjugacy classes of subgroups; only the 40 normal subgroups are shown.

normal subgroups only

This group has 606 conjugacy classes of subgroups — too many to draw. Only its 40 normal subgroups are shown.

Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.

Full subgroup data →

Presentation

minimal degreeμ(G) = 18
transitive degreeμt(G) = 252

A minimal faithful permutation representation — 3 generators on 18 points:

(2,3)(4,5)(6,7)(9,10)(12,13,14)(16,17,18);(1,2,4,6,7,5,3)(8,9,10)(15,18)(16,17);(11,14)(12,13)

Conjugacy classes & character table

96 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC22⋊A4×C3⋊AGL(1,𝔽7), D3×D7×C22⋊A4
maximal normal subgroup ofC22⋊A4×C3⋊AGL(1,𝔽7), D3×D7×C22⋊A4
maximal quotient ofD21×#997

GAP

Past the SmallGroups library coverage — no SmallGroups id. Construct it from a minimal faithful permutation representation:

gap> G := Group((2,3)(4,5)(6,7)(9,10)(12,13,14)(16,17,18), (1,2,4,6,7,5,3)(8,9,10)(15,18)(16,17), (11,14)(12,13));