File: 3.9.1

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gap-hap 1.66%2Bds-1
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#Uses Singular software.
G:=QuaternionGroup(8);;
N:=Center(G);;
Einf:=LHSSpectralSequenceLastSheet(G,N);
Print(Einf,"\n");
A:=Mod2CohomologyRingPresentation(G,5);
Print(A,"\n");
L:=LHSSpectralSequence(G,N,4);
Print(L,"\n");
ring := PolynomialRing(GF(2), 3);;
x := ring.1;; y := ring.2;; z := ring.3;;
d := HAPDerivation(ring, [x^2 + x*y + y^2], [Zero(ring), Zero(ring), x^2*y + x*y^2]);
Print(d,"\n");
H:=HomologyOfDerivation(d);
Print(H,"\n");
Print(H[3]!.SourceGenerators,"\n");
Print(H[3]!.ImageGenerators,"\n");