Extensions 1→N→G→Q→1 with N=D4 and Q=C22

Direct product G=N×Q with N=D4 and Q=C22
dρLabelID
C22×D416C2^2xD432,46

Semidirect products G=N:Q with N=D4 and Q=C22
extensionφ:Q→Out NdρLabelID
D41C22 = C2×D8φ: C22/C2C2 ⊆ Out D416D4:1C2^232,39
D42C22 = C8⋊C22φ: C22/C2C2 ⊆ Out D484+D4:2C2^232,43
D43C22 = C2×C4○D4φ: trivial image16D4:3C2^232,48
D44C22 = 2+ 1+4φ: trivial image84+D4:4C2^232,49

Non-split extensions G=N.Q with N=D4 and Q=C22
extensionφ:Q→Out NdρLabelID
D4.1C22 = C2×SD16φ: C22/C2C2 ⊆ Out D416D4.1C2^232,40
D4.2C22 = C4○D8φ: C22/C2C2 ⊆ Out D4162D4.2C2^232,42
D4.3C22 = C8.C22φ: C22/C2C2 ⊆ Out D4164-D4.3C2^232,44
D4.4C22 = 2- 1+4φ: trivial image164-D4.4C2^232,50

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