Extensions 1→N→G→Q→1 with N=C2 and Q=D4:2D9

Direct product G=NxQ with N=C2 and Q=D4:2D9
dρLabelID
C2xD4:2D9144C2xD4:2D9288,357


Non-split extensions G=N.Q with N=C2 and Q=D4:2D9
extensionφ:Q→Aut NdρLabelID
C2.1(D4:2D9) = C23.16D18central extension (φ=1)144C2.1(D4:2D9)288,87
C2.2(D4:2D9) = Dic9:4D4central extension (φ=1)144C2.2(D4:2D9)288,91
C2.3(D4:2D9) = Dic9:3Q8central extension (φ=1)288C2.3(D4:2D9)288,97
C2.4(D4:2D9) = C4:C4:7D9central extension (φ=1)144C2.4(D4:2D9)288,102
C2.5(D4:2D9) = D4xDic9central extension (φ=1)144C2.5(D4:2D9)288,144
C2.6(D4:2D9) = C22:2Dic18central stem extension (φ=1)144C2.6(D4:2D9)288,88
C2.7(D4:2D9) = C23.8D18central stem extension (φ=1)144C2.7(D4:2D9)288,89
C2.8(D4:2D9) = C23.9D18central stem extension (φ=1)144C2.8(D4:2D9)288,93
C2.9(D4:2D9) = Dic9.D4central stem extension (φ=1)144C2.9(D4:2D9)288,95
C2.10(D4:2D9) = C22.4D36central stem extension (φ=1)144C2.10(D4:2D9)288,96
C2.11(D4:2D9) = Dic9.Q8central stem extension (φ=1)288C2.11(D4:2D9)288,99
C2.12(D4:2D9) = C36.3Q8central stem extension (φ=1)288C2.12(D4:2D9)288,100
C2.13(D4:2D9) = D18:2Q8central stem extension (φ=1)144C2.13(D4:2D9)288,107
C2.14(D4:2D9) = C4:C4:D9central stem extension (φ=1)144C2.14(D4:2D9)288,108
C2.15(D4:2D9) = C23.23D18central stem extension (φ=1)144C2.15(D4:2D9)288,145
C2.16(D4:2D9) = C36.17D4central stem extension (φ=1)144C2.16(D4:2D9)288,146
C2.17(D4:2D9) = C36:2D4central stem extension (φ=1)144C2.17(D4:2D9)288,148
C2.18(D4:2D9) = Dic9:D4central stem extension (φ=1)144C2.18(D4:2D9)288,149

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