Extensions 1→N→G→Q→1 with N=Dic₉ and Q=C₄

Direct product G=N×Q with N=Dic₉ and Q=C₄

		d	ρ	Label	ID
C₄×Dic₉		144		C4xDic9	144,11

Semidirect products G=N:Q with N=Dic₉ and Q=C₄

extension	φ:Q→Out N	d	ρ	Label	ID
Dic₉⋊C₄ = Dic₉⋊C₄	φ: C₄/C₂ → C₂ ⊆ Out Dic₉	144		Dic9:C4	144,12

Non-split extensions G=N.Q with N=Dic₉ and Q=C₄

extension	φ:Q→Out N	d	ρ	Label	ID
Dic₉.C₄ = C₈⋊D₉	φ: C₄/C₂ → C₂ ⊆ Out Dic₉	72	2	Dic9.C4	144,6
Dic₉.₂C₄ = C₈×D₉	φ: trivial image	72	2	Dic9.2C4	144,5

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Extensions 1→N→G→Q→1 with N=Dic9 and Q=C4