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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
7
×D
9
Direct product G=N×Q with N=
C
2
and Q=
C
7
×D
9
d
ρ
Label
ID
C
14
×D
9
126
2
C14xD9
252,13
Non-split extensions G=N.Q with N=
C
2
and Q=
C
7
×D
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(C
7
×D
9
) =
C
7
×Dic
9
central extension (φ=1)
252
2
C2.(C7xD9)
252,3
×
⋊
ℤ
𝔽
○
≀
ℚ
◁