Extensions 1→N→G→Q→1 with N=C₂ and Q=C₉⋊D₄

Direct product G=N×Q with N=C₂ and Q=C₉⋊D₄

		d	ρ	Label	ID
C₂×C₉⋊D₄		72		C2xC9:D4	144,46

Non-split extensions G=N.Q with N=C₂ and Q=C₉⋊D₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(C₉⋊D₄) = Dic₉⋊C₄	central extension (φ=1)	144		C2.1(C9:D4)	144,12
C₂.₂(C₉⋊D₄) = D₁₈⋊C₄	central extension (φ=1)	72		C2.2(C9:D4)	144,14
C₂.₃(C₉⋊D₄) = C₁₈.D₄	central extension (φ=1)	72		C2.3(C9:D4)	144,19
C₂.₄(C₉⋊D₄) = D₄.D₉	central stem extension (φ=1)	72	4-	C2.4(C9:D4)	144,15
C₂.₅(C₉⋊D₄) = D₄⋊D₉	central stem extension (φ=1)	72	4+	C2.5(C9:D4)	144,16
C₂.₆(C₉⋊D₄) = C₉⋊Q₁₆	central stem extension (φ=1)	144	4-	C2.6(C9:D4)	144,17
C₂.₇(C₉⋊D₄) = Q₈⋊₂D₉	central stem extension (φ=1)	72	4+	C2.7(C9:D4)	144,18

׿

×

⋊

ℤ

𝔽

○

≀

ℚ

◁