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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
19
and Q=
D
9
Direct product G=N×Q with N=
C
19
and Q=
D
9
d
ρ
Label
ID
D
9
×C
19
171
2
D9xC19
342,3
Semidirect products G=N:Q with N=
C
19
and Q=
D
9
extension
φ:Q→Aut N
d
ρ
Label
ID
C
19
⋊D
9
=
D
171
φ:
D
9
/
C
9
→
C
2
⊆ Aut
C
19
171
2+
C19:D9
342,5
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⋊
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𝔽
○
≀
ℚ
◁