Finite Group Databasebeta
Cayley diagram

D12 #65

order24
isoclinismisoclinic class of Dic6
automorphismAut(G) = D3×D4 (order 48) · Inn(G) = C2×D3 · Out(G) = C22
holomorphG ⋊ Aut(G) = #11864777
homologyAbelianization (H1) = C22 · Schur multiplier (H2) = C2

Aliases

dihedralD12
unambiguous semidirect productC4⋊D3

Splittings

FittingC3×C4 ⋊ C2
SylowC3 ⋊ D4

Subgroups

subgroupG/H
center, FrattiniC2C2×D3
commutator, socle, cosocleC2×C3C22
FittingC3×C4C2
hypercenterC4D3
hypocenterC3D4
LCSG ▷ C2×C3 ▷ C3
UCSC1 ◁ C2 ◁ C4

16 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 7
transitive degreeμt(G) = 12

A minimal faithful permutation representation — 2 generators on 7 points:

(1,2,3,4)(5,6,7);(2,4)(6,7)

Polycyclic presentation:

2^3,3|b^2=c,b^a=bc,d^a=d^2

Conjugacy classes & character table

C1C2C3C4C5C6C7C8C9
size112222266
order12346121222
χ1111111111
χ21111111-1-1
χ3111-11-1-11-1
χ4111-11-1-1-11
χ522-12-1-1-100
χ622-1-2-11100
χ72-220-20000
χ82-2-1013−300
χ92-2-101−3300

Relationships

maximal subgroup of#204, D24, #213, …
maximal normal subgroup of#204, D24, #213, …
maximal quotient of#204, D24, Dic12, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(24, 6);