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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=
C
3
2
xD
7
Direct product G=NxQ with N=
C
2
and Q=
C
3
2
xD
7
d
ρ
Label
ID
D
7
xC
3
xC
6
126
D7xC3xC6
252,41
Non-split extensions G=N.Q with N=
C
2
and Q=
C
3
2
xD
7
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(C
3
2
xD
7
) =
C
3
2
xDic
7
central extension (φ=1)
252
C2.(C3^2xD7)
252,20
x
:
Z
F
o
wr
Q
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