Extensions 1→N→G→Q→1 with N=C₁₈ and Q=D₉

Direct product G=N×Q with N=C₁₈ and Q=D₉

		d	ρ	Label	ID
D₉×C₁₈		36	2	D9xC18	324,61

Semidirect products G=N:Q with N=C₁₈ and Q=D₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈⋊D₉ = C₂×C₉⋊D₉	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	162		C18:D9	324,74

Non-split extensions G=N.Q with N=C₁₈ and Q=D₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈.₁D₉ = Dic₈₁	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	324	2-	C18.1D9	324,1
C₁₈.₂D₉ = D₁₆₂	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	162	2+	C18.2D9	324,4
C₁₈.₃D₉ = C₉⋊Dic₉	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	324		C18.3D9	324,19
C₁₈.₄D₉ = C₂₇⋊Dic₃	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	324		C18.4D9	324,21
C₁₈.₅D₉ = C₂×C₂₇⋊S₃	φ: D₉/C₉ → C₂ ⊆ Aut C₁₈	162		C18.5D9	324,76
C₁₈.₆D₉ = C₉×Dic₉	central extension (φ=1)	36	2	C18.6D9	324,6

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