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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=
C
2
×C
10
Direct product G=N×Q with N=
C
9
and Q=
C
2
×C
10
d
ρ
Label
ID
C
2
×C
90
180
C2xC90
180,12
Semidirect products G=N:Q with N=
C
9
and Q=
C
2
×C
10
extension
φ:Q→Aut N
d
ρ
Label
ID
C
9
⋊(C
2
×C
10
) =
C
10
×D
9
φ:
C
2
×C
10
/
C
10
→
C
2
⊆ Aut
C
9
90
2
C9:(C2xC10)
180,10
×
⋊
ℤ
𝔽
○
≀
ℚ
◁