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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
7
and Q=
D
18
Direct product G=N×Q with N=
C
7
and Q=
D
18
d
ρ
Label
ID
C
14
×D
9
126
2
C14xD9
252,13
Semidirect products G=N:Q with N=
C
7
and Q=
D
18
extension
φ:Q→Aut N
d
ρ
Label
ID
C
7
⋊
1
D
18
=
D
7
×D
9
φ:
D
18
/
D
9
→
C
2
⊆ Aut
C
7
63
4+
C7:1D18
252,8
C
7
⋊
2
D
18
=
D
126
φ:
D
18
/
C
18
→
C
2
⊆ Aut
C
7
126
2+
C7:2D18
252,14
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⋊
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