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C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
x
:
.
o
wr
Extensions
1→N→G→Q→1 with N=
C
4
and Q=
C
9
.A
4
Direct product G=NxQ with N=
C
4
and Q=
C
9
.A
4
d
ρ
Label
ID
C
4
xC
9
.A
4
108
3
C4xC9.A4
432,40
Non-split extensions G=N.Q with N=
C
4
and Q=
C
9
.A
4
extension
φ:Q→Aut N
d
ρ
Label
ID
C
4
.(C
9
.A
4
) =
Q
8
.C
54
central extension (φ=1)
216
2
C4.(C9.A4)
432,42
x
:
Z
F
o
wr
Q
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