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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
8
2
Direct product G=N×Q with N=
C
2
and Q=
C
8
2
d
ρ
Label
ID
C
2
×C
8
2
128
C2xC8^2
128,179
Non-split extensions G=N.Q with N=
C
2
and Q=
C
8
2
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.
1
C
8
2
=
C
2
.C
8
2
central stem extension (φ=1)
128
C2.1C8^2
128,5
C
2
.
2
C
8
2
=
C
16
⋊
5
C
8
central stem extension (φ=1)
128
C2.2C8^2
128,43
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𝔽
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ℚ
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