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C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
×
⋊
.
○
≀
Extensions
1→N→G→Q→1 with N=
C
9
and Q=
Q
8
Direct product G=N×Q with N=
C
9
and Q=
Q
8
d
ρ
Label
ID
Q
8
×C
9
72
2
Q8xC9
72,11
Semidirect products G=N:Q with N=
C
9
and Q=
Q
8
extension
φ:Q→Aut N
d
ρ
Label
ID
C
9
⋊Q
8
=
Dic
18
φ:
Q
8
/
C
4
→
C
2
⊆ Aut
C
9
72
2-
C9:Q8
72,4
×
⋊
ℤ
𝔽
○
≀
ℚ
◁