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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
3
and Q=
C
7
:C
9
Direct product G=NxQ with N=
C
3
and Q=
C
7
:C
9
d
ρ
Label
ID
C
3
xC
7
:C
9
189
C3xC7:C9
189,6
Non-split extensions G=N.Q with N=
C
3
and Q=
C
7
:C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
3
.(C
7
:C
9
) =
C
7
:C
27
central extension (φ=1)
189
3
C3.(C7:C9)
189,1
x
:
Z
F
o
wr
Q
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