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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
5
and Q=
C
2
2
Direct product G=N×Q with N=
C
5
and Q=
C
2
2
d
ρ
Label
ID
C
2
×C
10
20
C2xC10
20,5
Semidirect products G=N:Q with N=
C
5
and Q=
C
2
2
extension
φ:Q→Aut N
d
ρ
Label
ID
C
5
⋊C
2
2
=
D
10
φ:
C
2
2
/
C
2
→
C
2
⊆ Aut
C
5
10
2+
C5:C2^2
20,4
×
⋊
ℤ
𝔽
○
≀
ℚ
◁