Extensions 1→N→G→Q→1 with N=C₂₁ and Q=D₉

Direct product G=N×Q with N=C₂₁ and Q=D₉

		d	ρ	Label	ID
D₉×C₂₁		126	2	D9xC21	378,32

Semidirect products G=N:Q with N=C₂₁ and Q=D₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₁⋊₁D₉ = C₃⋊D₆₃	φ: D₉/C₉ → C₂ ⊆ Aut C₂₁	189		C21:1D9	378,42
C₂₁⋊₂D₉ = C₃×D₆₃	φ: D₉/C₉ → C₂ ⊆ Aut C₂₁	126	2	C21:2D9	378,36
C₂₁⋊₃D₉ = C₇×C₉⋊S₃	φ: D₉/C₉ → C₂ ⊆ Aut C₂₁	189		C21:3D9	378,40

Non-split extensions G=N.Q with N=C₂₁ and Q=D₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₁.₁D₉ = D₁₈₉	φ: D₉/C₉ → C₂ ⊆ Aut C₂₁	189	2+	C21.1D9	378,5
C₂₁.₂D₉ = C₇×D₂₇	φ: D₉/C₉ → C₂ ⊆ Aut C₂₁	189	2	C21.2D9	378,3

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Extensions 1→N→G→Q→1 with N=C21 and Q=D9