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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
7
xA
4
Direct product G=NxQ with N=
C
4
and Q=
C
7
xA
4
d
ρ
Label
ID
A
4
xC
28
84
3
A4xC28
336,168
Non-split extensions G=N.Q with N=
C
4
and Q=
C
7
xA
4
extension
φ:Q→Aut N
d
ρ
Label
ID
C
4
.(C
7
xA
4
) =
C
7
xC
4
.A
4
central extension (φ=1)
112
2
C4.(C7xA4)
336,170
x
:
Z
F
o
wr
Q
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