Extensions 1→N→G→Q→1 with N=C₂ and Q=D₄×C₉

Direct product G=N×Q with N=C₂ and Q=D₄×C₉

		d	ρ	Label	ID
D₄×C₁₈		72		D4xC18	144,48

Non-split extensions G=N.Q with N=C₂ and Q=D₄×C₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(D₄×C₉) = C₉×C₂²⋊C₄	central extension (φ=1)	72		C2.1(D4xC9)	144,21
C₂.₂(D₄×C₉) = C₉×C₄⋊C₄	central extension (φ=1)	144		C2.2(D4xC9)	144,22
C₂.₃(D₄×C₉) = C₉×D₈	central stem extension (φ=1)	72	2	C2.3(D4xC9)	144,25
C₂.₄(D₄×C₉) = C₉×SD₁₆	central stem extension (φ=1)	72	2	C2.4(D4xC9)	144,26
C₂.₅(D₄×C₉) = C₉×Q₁₆	central stem extension (φ=1)	144	2	C2.5(D4xC9)	144,27

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