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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
×C
7
⋊C
9
Direct product G=N×Q with N=
C
2
and Q=
C
2
×C
7
⋊C
9
d
ρ
Label
ID
C
2
2
×C
7
⋊C
9
252
C2^2xC7:C9
252,9
Non-split extensions G=N.Q with N=
C
2
and Q=
C
2
×C
7
⋊C
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
2
.(C
2
×C
7
⋊C
9
) =
C
4
×C
7
⋊C
9
central extension (φ=1)
252
3
C2.(C2xC7:C9)
252,2
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○
≀
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