Extensions 1→N→G→Q→1 with N=C₂ and Q=C₂₀.₅₅D₄

Direct product G=N×Q with N=C₂ and Q=C₂₀.₅₅D₄

		d	ρ	Label	ID
C₂×C₂₀.₅₅D₄		160		C2xC20.55D4	320,833

Non-split extensions G=N.Q with N=C₂ and Q=C₂₀.₅₅D₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(C₂₀.₅₅D₄) = (C₂×C₂₀)⋊₈C₈	central extension (φ=1)	320		C2.1(C20.55D4)	320,82
C₂.₂(C₂₀.₅₅D₄) = C₄₀.₉₁D₄	central extension (φ=1)	160		C2.2(C20.55D4)	320,107
C₂.₃(C₂₀.₅₅D₄) = C₂⁴.Dic₅	central stem extension (φ=1)	80		C2.3(C20.55D4)	320,83
C₂.₄(C₂₀.₅₅D₄) = (C₂×C₂₀)⋊C₈	central stem extension (φ=1)	160		C2.4(C20.55D4)	320,86
C₂.₅(C₂₀.₅₅D₄) = C₂₀.₅₇D₈	central stem extension (φ=1)	160		C2.5(C20.55D4)	320,92
C₂.₆(C₂₀.₅₅D₄) = C₂₀.₂₆Q₁₆	central stem extension (φ=1)	320		C2.6(C20.55D4)	320,93
C₂.₇(C₂₀.₅₅D₄) = C₄₀.D₄	central stem extension (φ=1)	80	4	C2.7(C20.55D4)	320,111
C₂.₈(C₂₀.₅₅D₄) = C₄₀.₉₂D₄	central stem extension (φ=1)	160	4	C2.8(C20.55D4)	320,119

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