Extensions 1→N→G→Q→1 with N=C2 and Q=D90

Direct product G=N×Q with N=C2 and Q=D90
dρLabelID
C22×D45180C2^2xD45360,49


Non-split extensions G=N.Q with N=C2 and Q=D90
extensionφ:Q→Aut NdρLabelID
C2.1D90 = C4×D45central extension (φ=1)1802C2.1D90360,26
C2.2D90 = C2×Dic45central extension (φ=1)360C2.2D90360,28
C2.3D90 = Dic90central stem extension (φ=1)3602-C2.3D90360,25
C2.4D90 = D180central stem extension (φ=1)1802+C2.4D90360,27
C2.5D90 = C457D4central stem extension (φ=1)1802C2.5D90360,29

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