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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
5
and Q=
D
18
Direct product G=N×Q with N=
C
5
and Q=
D
18
d
ρ
Label
ID
C
10
×D
9
90
2
C10xD9
180,10
Semidirect products G=N:Q with N=
C
5
and Q=
D
18
extension
φ:Q→Aut N
d
ρ
Label
ID
C
5
⋊
1
D
18
=
D
5
×D
9
φ:
D
18
/
D
9
→
C
2
⊆ Aut
C
5
45
4+
C5:1D18
180,7
C
5
⋊
2
D
18
=
D
90
φ:
D
18
/
C
18
→
C
2
⊆ Aut
C
5
90
2+
C5:2D18
180,11
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⋊
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𝔽
○
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◁