Extensions 1→N→G→Q→1 with N=C8 and Q=C4

Direct product G=N×Q with N=C8 and Q=C4
dρLabelID
C4×C832C4xC832,3

Semidirect products G=N:Q with N=C8 and Q=C4
extensionφ:Q→Aut NdρLabelID
C81C4 = C2.D8φ: C4/C2C2 ⊆ Aut C832C8:1C432,14
C82C4 = C4.Q8φ: C4/C2C2 ⊆ Aut C832C8:2C432,13
C83C4 = C8⋊C4φ: C4/C2C2 ⊆ Aut C832C8:3C432,4

Non-split extensions G=N.Q with N=C8 and Q=C4
extensionφ:Q→Aut NdρLabelID
C8.1C4 = C8.C4φ: C4/C2C2 ⊆ Aut C8162C8.1C432,15
C8.2C4 = M5(2)φ: C4/C2C2 ⊆ Aut C8162C8.2C432,17

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