Extensions 1→N→G→Q→1 with N=C₂₀ and Q=D₁₁

Direct product G=N×Q with N=C₂₀ and Q=D₁₁

		d	ρ	Label	ID
C₂₀×D₁₁		220	2	C20xD11	440,25

Semidirect products G=N:Q with N=C₂₀ and Q=D₁₁

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₀⋊₁D₁₁ = D₂₂₀	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	220	2+	C20:1D11	440,36
C₂₀⋊₂D₁₁ = C₄×D₅₅	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	220	2	C20:2D11	440,35
C₂₀⋊₃D₁₁ = C₅×D₄₄	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	220	2	C20:3D11	440,26

Non-split extensions G=N.Q with N=C₂₀ and Q=D₁₁

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₀.₁D₁₁ = Dic₁₁₀	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	440	2-	C20.1D11	440,34
C₂₀.₂D₁₁ = C₅₅⋊₃C₈	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	440	2	C20.2D11	440,5
C₂₀.₃D₁₁ = C₅×Dic₂₂	φ: D₁₁/C₁₁ → C₂ ⊆ Aut C₂₀	440	2	C20.3D11	440,24
C₂₀.₄D₁₁ = C₅×C₁₁⋊C₈	central extension (φ=1)	440	2	C20.4D11	440,4

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