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C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
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⋊
.
○
≀
Extensions
1→N→G→Q→1 with N=
C
2
and Q=
C
4
2
⋊C
9
Direct product G=N×Q with N=
C
2
and Q=
C
4
2
⋊C
9
d
ρ
Label
ID
C
2
×C
4
2
⋊C
9
36
3
C2xC4^2:C9
288,71
Non-split extensions G=N.Q with N=
C
2
and Q=
C
4
2
⋊C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(C
4
2
⋊C
9
) =
C
2
.(C
4
2
⋊C
9
)
central stem extension (φ=1)
36
6
C2.(C4^2:C9)
288,3
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ℚ
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