Extensions 1→N→G→Q→1 with N=D54 and Q=C2

Direct product G=N×Q with N=D54 and Q=C2
dρLabelID
C22×D27108C2^2xD27216,23

Semidirect products G=N:Q with N=D54 and Q=C2
extensionφ:Q→Out NdρLabelID
D541C2 = D108φ: C2/C1C2 ⊆ Out D541082+D54:1C2216,6
D542C2 = C27⋊D4φ: C2/C1C2 ⊆ Out D541082D54:2C2216,8

Non-split extensions G=N.Q with N=D54 and Q=C2
extensionφ:Q→Out NdρLabelID
D54.C2 = C4×D27φ: trivial image1082D54.C2216,5

׿
×
𝔽