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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
9
and Q=
D
19
Direct product G=N×Q with N=
C
9
and Q=
D
19
d
ρ
Label
ID
C
9
×D
19
171
2
C9xD19
342,4
Semidirect products G=N:Q with N=
C
9
and Q=
D
19
extension
φ:Q→Aut N
d
ρ
Label
ID
C
9
⋊D
19
=
D
171
φ:
D
19
/
C
19
→
C
2
⊆ Aut
C
9
171
2+
C9:D19
342,5
×
⋊
ℤ
𝔽
○
≀
ℚ
◁