Extensions 1→N→G→Q→1 with N=C2 and Q=C22×D9

Direct product G=N×Q with N=C2 and Q=C22×D9

Non-split extensions G=N.Q with N=C2 and Q=C22×D9
extensionφ:Q→Aut NdρLabelID
C2.1(C22×D9) = C2×C4×D9central extension (φ=1)72C2.1(C2^2xD9)144,38
C2.2(C22×D9) = C22×Dic9central extension (φ=1)144C2.2(C2^2xD9)144,45
C2.3(C22×D9) = C2×Dic18central stem extension (φ=1)144C2.3(C2^2xD9)144,37
C2.4(C22×D9) = C2×D36central stem extension (φ=1)72C2.4(C2^2xD9)144,39
C2.5(C22×D9) = D365C2central stem extension (φ=1)722C2.5(C2^2xD9)144,40
C2.6(C22×D9) = D4×D9central stem extension (φ=1)364+C2.6(C2^2xD9)144,41
C2.7(C22×D9) = D42D9central stem extension (φ=1)724-C2.7(C2^2xD9)144,42
C2.8(C22×D9) = Q8×D9central stem extension (φ=1)724-C2.8(C2^2xD9)144,43
C2.9(C22×D9) = Q83D9central stem extension (φ=1)724+C2.9(C2^2xD9)144,44
C2.10(C22×D9) = C2×C9⋊D4central stem extension (φ=1)72C2.10(C2^2xD9)144,46