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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
2
4
:C
9
Direct product G=NxQ with N=
C
2
and Q=
C
2
4
:C
9
d
ρ
Label
ID
C
2
xC
2
4
:C
9
36
C2xC2^4:C9
288,838
Non-split extensions G=N.Q with N=
C
2
and Q=
C
2
4
:C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.
1
(C
2
4
:C
9
) =
C
2
2
:(Q
8
:C
9
)
central stem extension (φ=1)
72
6
C2.1(C2^4:C9)
288,350
C
2
.
2
(C
2
4
:C
9
) =
2
+
1+4
:
2
C
9
central stem extension (φ=1)
72
4
C2.2(C2^4:C9)
288,351
x
:
Z
F
o
wr
Q
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