Extensions 1→N→G→Q→1 with N=D42 and Q=C2

Direct product G=N×Q with N=D42 and Q=C2
dρLabelID
C2×D4232C2xD4^2128,2194

Semidirect products G=N:Q with N=D42 and Q=C2
extensionφ:Q→Out NdρLabelID
D421C2 = D4⋊D8φ: C2/C1C2 ⊆ Out D4232D4^2:1C2128,351
D422C2 = D4≀C2φ: C2/C1C2 ⊆ Out D4284+D4^2:2C2128,928
D423C2 = D89D4φ: C2/C1C2 ⊆ Out D4232D4^2:3C2128,1996
D424C2 = SD16⋊D4φ: C2/C1C2 ⊆ Out D4232D4^2:4C2128,1997
D425C2 = D84D4φ: C2/C1C2 ⊆ Out D4232D4^2:5C2128,2004
D426C2 = SD161D4φ: C2/C1C2 ⊆ Out D4232D4^2:6C2128,2006
D427C2 = D4×D8φ: C2/C1C2 ⊆ Out D4232D4^2:7C2128,2011
D428C2 = D44D8φ: C2/C1C2 ⊆ Out D4232D4^2:8C2128,2026
D429C2 = C42.53C23φ: C2/C1C2 ⊆ Out D4232D4^2:9C2128,2050
D4210C2 = C42.474C23φ: C2/C1C2 ⊆ Out D4232D4^2:10C2128,2057
D4211C2 = C22.73C25φ: C2/C1C2 ⊆ Out D4216D4^2:11C2128,2216
D4212C2 = C22.77C25φ: C2/C1C2 ⊆ Out D4232D4^2:12C2128,2220
D4213C2 = C4⋊2+ 1+4φ: C2/C1C2 ⊆ Out D4232D4^2:13C2128,2228
D4214C2 = C22.87C25φ: C2/C1C2 ⊆ Out D4232D4^2:14C2128,2230
D4215C2 = C22.102C25φ: C2/C1C2 ⊆ Out D4232D4^2:15C2128,2245
D4216C2 = C22.103C25φ: C2/C1C2 ⊆ Out D4232D4^2:16C2128,2246
D4217C2 = C22.108C25φ: C2/C1C2 ⊆ Out D4232D4^2:17C2128,2251
D4218C2 = C42⋊C23φ: C2/C1C2 ⊆ Out D4216D4^2:18C2128,2264
D4219C2 = C22.123C25φ: C2/C1C2 ⊆ Out D4232D4^2:19C2128,2266
D4220C2 = C22.126C25φ: C2/C1C2 ⊆ Out D4232D4^2:20C2128,2269
D4221C2 = C22.131C25φ: C2/C1C2 ⊆ Out D4232D4^2:21C2128,2274
D4222C2 = C22.132C25φ: C2/C1C2 ⊆ Out D4232D4^2:22C2128,2275
D4223C2 = C22.135C25φ: C2/C1C2 ⊆ Out D4232D4^2:23C2128,2278
D4224C2 = C22.138C25φ: C2/C1C2 ⊆ Out D4232D4^2:24C2128,2281
D4225C2 = C22.147C25φ: C2/C1C2 ⊆ Out D4232D4^2:25C2128,2290
D4226C2 = D4×C4○D4φ: trivial image32D4^2:26C2128,2200
D4227C2 = C22.70C25φ: trivial image32D4^2:27C2128,2213

Non-split extensions G=N.Q with N=D42 and Q=C2
extensionφ:Q→Out NdρLabelID
D42.1C2 = D42SD16φ: C2/C1C2 ⊆ Out D4232D4^2.1C2128,361
D42.2C2 = D4.D8φ: C2/C1C2 ⊆ Out D4232D4^2.2C2128,371
D42.3C2 = D4×SD16φ: C2/C1C2 ⊆ Out D4232D4^2.3C2128,2013
D42.4C2 = D47SD16φ: C2/C1C2 ⊆ Out D4232D4^2.4C2128,2027
D42.5C2 = C42.45C23φ: C2/C1C2 ⊆ Out D4232D4^2.5C2128,2042
D42.6C2 = C42.473C23φ: C2/C1C2 ⊆ Out D4232D4^2.6C2128,2056

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