Extensions 1→N→G→Q→1 with N=C4 and Q=Dic17

Direct product G=N×Q with N=C4 and Q=Dic17
dρLabelID
C4×Dic17272C4xDic17272,11

Semidirect products G=N:Q with N=C4 and Q=Dic17
extensionφ:Q→Aut NdρLabelID
C4⋊Dic17 = C683C4φ: Dic17/C34C2 ⊆ Aut C4272C4:Dic17272,13

Non-split extensions G=N.Q with N=C4 and Q=Dic17
extensionφ:Q→Aut NdρLabelID
C4.Dic17 = C68.4C4φ: Dic17/C34C2 ⊆ Aut C41362C4.Dic17272,10
C4.2Dic17 = C174C16central extension (φ=1)2722C4.2Dic17272,1
C4.3Dic17 = C2×C173C8central extension (φ=1)272C4.3Dic17272,9

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