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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
9
.A
4
Direct product G=NxQ with N=
C
2
and Q=
C
9
.A
4
d
ρ
Label
ID
C
2
xC
9
.A
4
54
3
C2xC9.A4
216,22
Non-split extensions G=N.Q with N=
C
2
and Q=
C
9
.A
4
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(C
9
.A
4
) =
Q
8
:C
27
central stem extension (φ=1)
216
2
C2.(C9.A4)
216,3
x
:
Z
F
o
wr
Q
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