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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
xA
4
Direct product G=NxQ with N=
C
4
and Q=
C
9
xA
4
d
ρ
Label
ID
A
4
xC
36
108
3
A4xC36
432,325
Non-split extensions G=N.Q with N=
C
4
and Q=
C
9
xA
4
extension
φ:Q→Aut N
d
ρ
Label
ID
C
4
.(C
9
xA
4
) =
C
9
xC
4
.A
4
central extension (φ=1)
144
2
C4.(C9xA4)
432,329
x
:
Z
F
o
wr
Q
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