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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=
C
2
2
and Q=
C
3
×C
9
Direct product G=N×Q with N=
C
2
2
and Q=
C
3
×C
9
d
ρ
Label
ID
C
6
×C
18
108
C6xC18
108,29
Semidirect products G=N:Q with N=
C
2
2
and Q=
C
3
×C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
2
⋊
1
(C
3
×C
9
) =
C
9
×A
4
φ:
C
3
×C
9
/
C
9
→
C
3
⊆ Aut
C
2
2
36
3
C2^2:1(C3xC9)
108,18
C
2
2
⋊
2
(C
3
×C
9
) =
C
3
×C
3
.A
4
φ:
C
3
×C
9
/
C
3
2
→
C
3
⊆ Aut
C
2
2
54
C2^2:2(C3xC9)
108,20
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⋊
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○
≀
ℚ
◁