Extensions 1→N→G→Q→1 with N=C20⋊D4 and Q=C2

Direct product G=N×Q with N=C20⋊D4 and Q=C2
dρLabelID
C2×C20⋊D4160C2xC20:D4320,1475

Semidirect products G=N:Q with N=C20⋊D4 and Q=C2
extensionφ:Q→Out NdρLabelID
C20⋊D4⋊1C2 = D20⋊1D4φ: C2/C1 → C2 ⊆ Out C20⋊D4408+C20:D4:1C2320,374
C20⋊D4⋊2C2 = D20⋊3D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:2C2320,413
C20⋊D4⋊3C2 = Dic5⋊D8φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:3C2320,777
C20⋊D4⋊4C2 = C40⋊5D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:4C2320,778
C20⋊D4⋊5C2 = C40⋊11D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:5C2320,781
C20⋊D4⋊6C2 = C40⋊9D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:6C2320,803
C20⋊D4⋊7C2 = D20⋊18D4φ: C2/C1 → C2 ⊆ Out C20⋊D4408+C20:D4:7C2320,825
C20⋊D4⋊8C2 = 2+ 1+4⋊D5φ: C2/C1 → C2 ⊆ Out C20⋊D4408+C20:D4:8C2320,868
C20⋊D4⋊9C2 = Dic10⋊24D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:9C2320,1225
C20⋊D4⋊10C2 = C42.116D10φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:10C2320,1234
C20⋊D4⋊11C2 = C24⋊4D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:11C2320,1262
C20⋊D4⋊12C2 = C24.34D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:12C2320,1264
C20⋊D4⋊13C2 = C24.36D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:13C2320,1267
C20⋊D4⋊14C2 = C20⋊(C4○D4)φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:14C2320,1268
C20⋊D4⋊15C2 = Dic10⋊20D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:15C2320,1271
C20⋊D4⋊16C2 = C10.382+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:16C2320,1279
C20⋊D4⋊17C2 = D20⋊19D4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:17C2320,1281
C20⋊D4⋊18C2 = C10.442+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:18C2320,1287
C20⋊D4⋊19C2 = C10.472+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:19C2320,1291
C20⋊D4⋊20C2 = C10.482+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:20C2320,1292
C20⋊D4⋊21C2 = C10.662+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:21C2320,1335
C20⋊D4⋊22C2 = C10.682+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:22C2320,1338
C20⋊D4⋊23C2 = C42.233D10φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:23C2320,1340
C20⋊D4⋊24C2 = C42⋊18D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:24C2320,1346
C20⋊D4⋊25C2 = D5×C4⋊1D4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:25C2320,1386
C20⋊D4⋊26C2 = C42⋊26D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:26C2320,1387
C20⋊D4⋊27C2 = Dic10⋊11D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:27C2320,1390
C20⋊D4⋊28C2 = D4×C5⋊D4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:28C2320,1473
C20⋊D4⋊29C2 = C24.41D10φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:29C2320,1477
C20⋊D4⋊30C2 = C10.1462+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D480C20:D4:30C2320,1502
C20⋊D4⋊31C2 = C10.1482+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4:31C2320,1506
C20⋊D4⋊32C2 = C42.228D10φ: trivial image160C20:D4:32C2320,1220
C20⋊D4⋊33C2 = (C2×C20)⋊17D4φ: trivial image160C20:D4:33C2320,1504

Non-split extensions G=N.Q with N=C20⋊D4 and Q=C2
extensionφ:Q→Out NdρLabelID
C20⋊D4.1C2 = C23.2D20φ: C2/C1 → C2 ⊆ Out C20⋊D4408+C20:D4.1C2320,32
C20⋊D4.2C2 = (C2×D4)⋊F5φ: C2/C1 → C2 ⊆ Out C20⋊D4408+C20:D4.2C2320,260
C20⋊D4.3C2 = Dic5.SD16φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.3C2320,263
C20⋊D4.4C2 = Dic5.5D8φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.4C2320,387
C20⋊D4.5C2 = Dic10⋊2D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.5C2320,389
C20⋊D4.6C2 = C4⋊C4.D10φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.6C2320,391
C20⋊D4.7C2 = Dic5⋊5SD16φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.7C2320,790
C20⋊D4.8C2 = C40⋊15D4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.8C2320,802
C20⋊D4.9C2 = C42.114D10φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.9C2320,1231
C20⋊D4.10C2 = C10.672+ 1+4φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.10C2320,1336
C20⋊D4.11C2 = C42.143D10φ: C2/C1 → C2 ⊆ Out C20⋊D4160C20:D4.11C2320,1353

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