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C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
×
⋊
.
○
≀
Extensions
1→N→G→Q→1 with N=
D
9
and Q=
A
4
Direct product G=N×Q with N=
D
9
and Q=
A
4
d
ρ
Label
ID
A
4
×D
9
36
6+
A4xD9
216,97
Semidirect products G=N:Q with N=
D
9
and Q=
A
4
extension
φ:Q→Out N
d
ρ
Label
ID
D
9
⋊A
4
=
D
9
⋊A
4
φ:
A
4
/
C
2
2
→
C
3
⊆ Out
D
9
36
6+
D9:A4
216,96
×
⋊
ℤ
𝔽
○
≀
ℚ
◁