Extensions 1→N→G→Q→1 with N=C2 and Q=C2.C42

Direct product G=N×Q with N=C2 and Q=C2.C42

Non-split extensions G=N.Q with N=C2 and Q=C2.C42
extensionφ:Q→Aut NdρLabelID
C2.1(C2.C42) = C22.7C42central extension (φ=1)64C2.1(C2.C4^2)64,17
C2.2(C2.C42) = C4.9C42central stem extension (φ=1)164C2.2(C2.C4^2)64,18
C2.3(C2.C42) = C4.10C42central stem extension (φ=1)164C2.3(C2.C4^2)64,19
C2.4(C2.C42) = C426C4central stem extension (φ=1)16C2.4(C2.C4^2)64,20
C2.5(C2.C42) = C22.4Q16central stem extension (φ=1)64C2.5(C2.C4^2)64,21
C2.6(C2.C42) = C4.C42central stem extension (φ=1)32C2.6(C2.C4^2)64,22
C2.7(C2.C42) = C23.9D4central stem extension (φ=1)16C2.7(C2.C4^2)64,23
C2.8(C2.C42) = C22.C42central stem extension (φ=1)32C2.8(C2.C4^2)64,24
C2.9(C2.C42) = M4(2)⋊4C4central stem extension (φ=1)164C2.9(C2.C4^2)64,25