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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
2
and Q=
C
2
4
⋊C
9
Direct product G=N×Q with N=
C
2
and Q=
C
2
4
⋊C
9
d
ρ
Label
ID
C
2
×C
2
4
⋊C
9
36
C2xC2^4:C9
288,838
Non-split extensions G=N.Q with N=
C
2
and Q=
C
2
4
⋊C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.
1
(C
2
4
⋊C
9
) =
C
2
2
⋊(Q
8
⋊C
9
)
central stem extension (φ=1)
72
6
C2.1(C2^4:C9)
288,350
C
2
.
2
(C
2
4
⋊C
9
) =
2
+
1+4
⋊
2
C
9
central stem extension (φ=1)
72
4
C2.2(C2^4:C9)
288,351
×
⋊
ℤ
𝔽
○
≀
ℚ
◁