# Extensions 1→N→G→Q→1 with N=C2 and Q=C22.SD16

Direct product G=N×Q with N=C2 and Q=C22.SD16
dρLabelID
C2×C22.SD1632C2xC2^2.SD16128,230

Non-split extensions G=N.Q with N=C2 and Q=C22.SD16
extensionφ:Q→Aut NdρLabelID
C2.1(C22.SD16) = (C2×C4).98D8central extension (φ=1)64C2.1(C2^2.SD16)128,2
C2.2(C22.SD16) = C4⋊C4⋊C8central extension (φ=1)128C2.2(C2^2.SD16)128,3
C2.3(C22.SD16) = C23.30D8central extension (φ=1)32C2.3(C2^2.SD16)128,26
C2.4(C22.SD16) = C23.D8central stem extension (φ=1)168+C2.4(C2^2.SD16)128,71
C2.5(C22.SD16) = C23.2D8central stem extension (φ=1)328-C2.5(C2^2.SD16)128,72
C2.6(C22.SD16) = C23.SD16central stem extension (φ=1)168+C2.6(C2^2.SD16)128,73
C2.7(C22.SD16) = C23.2SD16central stem extension (φ=1)328-C2.7(C2^2.SD16)128,74
C2.8(C22.SD16) = C24.D4central stem extension (φ=1)16C2.8(C2^2.SD16)128,75
C2.9(C22.SD16) = C23.4D8central stem extension (φ=1)32C2.9(C2^2.SD16)128,76
C2.10(C22.SD16) = C2.C2≀C4central stem extension (φ=1)32C2.10(C2^2.SD16)128,77
C2.11(C22.SD16) = (C2×C4).D8central stem extension (φ=1)32C2.11(C2^2.SD16)128,78
C2.12(C22.SD16) = C22.SD32central stem extension (φ=1)32C2.12(C2^2.SD16)128,79
C2.13(C22.SD16) = C23.32D8central stem extension (φ=1)32C2.13(C2^2.SD16)128,80
C2.14(C22.SD16) = C23.12SD16central stem extension (φ=1)64C2.14(C2^2.SD16)128,81
C2.15(C22.SD16) = C23.13SD16central stem extension (φ=1)64C2.15(C2^2.SD16)128,82

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