# Extensions 1→N→G→Q→1 with N=C2 and Q=C22×C42

Direct product G=N×Q with N=C2 and Q=C22×C42
dρLabelID
C23×C42128C2^3xC4^2128,2150

Non-split extensions G=N.Q with N=C2 and Q=C22×C42
extensionφ:Q→Aut NdρLabelID
C2.1(C22×C42) = C22×C2.C42central stem extension (φ=1)128C2.1(C2^2xC4^2)128,998
C2.2(C22×C42) = C2×C424C4central stem extension (φ=1)128C2.2(C2^2xC4^2)128,999
C2.3(C22×C42) = C2×C4×C22⋊C4central stem extension (φ=1)64C2.3(C2^2xC4^2)128,1000
C2.4(C22×C42) = C2×C4×C4⋊C4central stem extension (φ=1)128C2.4(C2^2xC4^2)128,1001
C2.5(C22×C42) = C4×C42⋊C2central stem extension (φ=1)64C2.5(C2^2xC4^2)128,1002
C2.6(C22×C42) = D4×C42central stem extension (φ=1)64C2.6(C2^2xC4^2)128,1003
C2.7(C22×C42) = Q8×C42central stem extension (φ=1)128C2.7(C2^2xC4^2)128,1004
C2.8(C22×C42) = C23⋊C42central stem extension (φ=1)32C2.8(C2^2xC4^2)128,1005
C2.9(C22×C42) = C24.524C23central stem extension (φ=1)64C2.9(C2^2xC4^2)128,1006
C2.10(C22×C42) = D44C42central stem extension (φ=1)64C2.10(C2^2xC4^2)128,1007
C2.11(C22×C42) = Q84C42central stem extension (φ=1)128C2.11(C2^2xC4^2)128,1008
C2.12(C22×C42) = C22×C8⋊C4central stem extension (φ=1)128C2.12(C2^2xC4^2)128,1602
C2.13(C22×C42) = C2×C4×M4(2)central stem extension (φ=1)64C2.13(C2^2xC4^2)128,1603
C2.14(C22×C42) = C2×C82M4(2)central stem extension (φ=1)64C2.14(C2^2xC4^2)128,1604
C2.15(C22×C42) = M4(2)○2M4(2)central stem extension (φ=1)32C2.15(C2^2xC4^2)128,1605
C2.16(C22×C42) = C4×C8○D4central stem extension (φ=1)64C2.16(C2^2xC4^2)128,1606
C2.17(C22×C42) = D4.5C42central stem extension (φ=1)64C2.17(C2^2xC4^2)128,1607

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