Extensions 1→N→G→Q→1 with N=C₂ and Q=D₄.D₄

Direct product G=N×Q with N=C₂ and Q=D₄.D₄

		d	ρ	Label	ID
C₂×D₄.D₄		64		C2xD4.D4	128,1762

Non-split extensions G=N.Q with N=C₂ and Q=D₄.D₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(D₄.D₄) = C₄².₉₈D₄	central extension (φ=1)	64		C2.1(D4.D4)	128,534
C₂.₂(D₄.D₄) = (C₂×SD₁₆)⋊₁₄C₄	central extension (φ=1)	64		C2.2(D4.D4)	128,609
C₂.₃(D₄.D₄) = C₄.₆₈(C₄×D₄)	central extension (φ=1)	128		C2.3(D4.D4)	128,659
C₂.₄(D₄.D₄) = C₄².₃₀Q₈	central extension (φ=1)	128		C2.4(D4.D4)	128,680
C₂.₅(D₄.D₄) = C₄².₁₁₇D₄	central extension (φ=1)	128		C2.5(D4.D4)	128,713
C₂.₆(D₄.D₄) = C₈⋊₁₁SD₁₆	central stem extension (φ=1)	64		C2.6(D4.D4)	128,403
C₂.₇(D₄.D₄) = C₈⋊₁₀SD₁₆	central stem extension (φ=1)	64		C2.7(D4.D4)	128,405
C₂.₈(D₄.D₄) = D₄.₁Q₁₆	central stem extension (φ=1)	64		C2.8(D4.D4)	128,407
C₂.₉(D₄.D₄) = C₈⋊₃SD₁₆	central stem extension (φ=1)	64		C2.9(D4.D4)	128,423
C₂.₁₀(D₄.D₄) = C₈⋊₄SD₁₆	central stem extension (φ=1)	64		C2.10(D4.D4)	128,425
C₂.₁₁(D₄.D₄) = C₈.₈SD₁₆	central stem extension (φ=1)	64		C2.11(D4.D4)	128,427
C₂.₁₂(D₄.D₄) = (C₂×C₄)⋊₃SD₁₆	central stem extension (φ=1)	64		C2.12(D4.D4)	128,745
C₂.₁₃(D₄.D₄) = C₄⋊C₄.₉₅D₄	central stem extension (φ=1)	128		C2.13(D4.D4)	128,775
C₂.₁₄(D₄.D₄) = (C₂×C₄)⋊₅SD₁₆	central stem extension (φ=1)	64		C2.14(D4.D4)	128,787
C₂.₁₅(D₄.D₄) = (C₂×Q₈).₈Q₈	central stem extension (φ=1)	128		C2.15(D4.D4)	128,798
C₂.₁₆(D₄.D₄) = (C₂×C₄).₂₄D₈	central stem extension (φ=1)	64		C2.16(D4.D4)	128,803
C₂.₁₇(D₄.D₄) = C₂.(C₈⋊₃Q₈)	central stem extension (φ=1)	128		C2.17(D4.D4)	128,816

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