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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
2
and Q=
S
3
xC
21
Direct product G=NxQ with N=
C
2
and Q=
S
3
xC
21
d
ρ
Label
ID
S
3
xC
42
84
2
S3xC42
252,42
Non-split extensions G=N.Q with N=
C
2
and Q=
S
3
xC
21
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(S
3
xC
21
) =
Dic
3
xC
21
central extension (φ=1)
84
2
C2.(S3xC21)
252,21
x
:
Z
F
o
wr
Q
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