Extensions 1→N→G→Q→1 with N=C₂ and Q=C₁₈.D₄

Direct product G=N×Q with N=C₂ and Q=C₁₈.D₄

		d	ρ	Label	ID
C₂×C₁₈.D₄		144		C2xC18.D4	288,162

Non-split extensions G=N.Q with N=C₂ and Q=C₁₈.D₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(C₁₈.D₄) = C₃₆.₅₅D₄	central extension (φ=1)	144		C2.1(C18.D4)	288,37
C₂.₂(C₁₈.D₄) = C₁₈.C₄²	central extension (φ=1)	288		C2.2(C18.D4)	288,38
C₂.₃(C₁₈.D₄) = C₃₆.D₄	central stem extension (φ=1)	72	4	C2.3(C18.D4)	288,39
C₂.₄(C₁₈.D₄) = D₄⋊Dic₉	central stem extension (φ=1)	144		C2.4(C18.D4)	288,40
C₂.₅(C₁₈.D₄) = C₂³⋊₂Dic₉	central stem extension (φ=1)	72	4	C2.5(C18.D4)	288,41
C₂.₆(C₁₈.D₄) = C₃₆.₉D₄	central stem extension (φ=1)	144	4	C2.6(C18.D4)	288,42
C₂.₇(C₁₈.D₄) = Q₈⋊₂Dic₉	central stem extension (φ=1)	288		C2.7(C18.D4)	288,43
C₂.₈(C₁₈.D₄) = Q₈⋊₃Dic₉	central stem extension (φ=1)	72	4	C2.8(C18.D4)	288,44

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