Extensions 1→N→G→Q→1 with N=2- 1+4 and Q=D7

Direct product G=N×Q with N=2- 1+4 and Q=D7
dρLabelID
D7×2- 1+41128-D7xES-(2,2)448,1381

Semidirect products G=N:Q with N=2- 1+4 and Q=D7
extensionφ:Q→Out NdρLabelID
2- 1+41D7 = 2- 1+4⋊D7φ: D7/C7C2 ⊆ Out 2- 1+41128+ES-(2,2):1D7448,779
2- 1+42D7 = D28.34C23φ: D7/C7C2 ⊆ Out 2- 1+41128+ES-(2,2):2D7448,1290
2- 1+43D7 = D28.35C23φ: D7/C7C2 ⊆ Out 2- 1+42248-ES-(2,2):3D7448,1291
2- 1+44D7 = D28.39C23φ: trivial image1128+ES-(2,2):4D7448,1382

Non-split extensions G=N.Q with N=2- 1+4 and Q=D7
extensionφ:Q→Out NdρLabelID
2- 1+4.D7 = 2- 1+4.D7φ: D7/C7C2 ⊆ Out 2- 1+41128-ES-(2,2).D7448,780

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