GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
C cohomolo.tex 1. Cohomology I 1.0. Cohomology! S 1.1. CHR F 1.1. CHR S 1.2. SchurMultiplier F 1.2. SchurMultiplier S 1.3. CoveringGroup F 1.3. CoveringGroup S 1.4. FirstCohomologyDimension F 1.4. FirstCohomologyDimension S 1.5. SecondCohomologyDimension F 1.5. SecondCohomologyDimension S 1.6. SplitExtensionCHR F 1.6. SplitExtensionCHR S 1.7. NonsplitExtension F 1.7. NonsplitExtension S 1.8. CalcPres F 1.8. CalcPres S 1.9. PermRep F 1.9. PermRep S 1.10. Further Information