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About
C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
×
⋊
.
○
≀
Extensions
1→N→G→Q→1 with N=
D
21
and Q=
C
2
3
Direct product G=N×Q with N=
D
21
and Q=
C
2
3
d
ρ
Label
ID
C
2
3
×D
21
168
C2^3xD21
336,227
Semidirect products G=N:Q with N=
D
21
and Q=
C
2
3
extension
φ:Q→Out N
d
ρ
Label
ID
D
21
⋊C
2
3
=
C
2
2
×S
3
×D
7
φ:
C
2
3
/
C
2
2
→
C
2
⊆ Out
D
21
84
D21:C2^3
336,219
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⋊
ℤ
𝔽
○
≀
ℚ
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