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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
9
and Q=
C
21
Direct product G=NxQ with N=
C
9
and Q=
C
21
d
ρ
Label
ID
C
3
xC
63
189
C3xC63
189,9
Semidirect products G=N:Q with N=
C
9
and Q=
C
21
extension
φ:Q→Aut N
d
ρ
Label
ID
C
9
:C
21
=
C
7
x3
-
1+2
φ:
C
21
/
C
7
→
C
3
⊆ Aut
C
9
63
3
C9:C21
189,11
x
:
Z
F
o
wr
Q
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