Extensions 1→N→G→Q→1 with N=D18 and Q=C4

Direct product G=N×Q with N=D18 and Q=C4
dρLabelID
C2×C4×D972C2xC4xD9144,38

Semidirect products G=N:Q with N=D18 and Q=C4
extensionφ:Q→Out NdρLabelID
D18⋊C4 = D18⋊C4φ: C4/C2C2 ⊆ Out D1872D18:C4144,14

Non-split extensions G=N.Q with N=D18 and Q=C4
extensionφ:Q→Out NdρLabelID
D18.C4 = C8⋊D9φ: C4/C2C2 ⊆ Out D18722D18.C4144,6
D18.2C4 = C8×D9φ: trivial image722D18.2C4144,5

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