File: 12.20.txt

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gap-hap 1.70%2Bds-1
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gap> Manifolds:=List(D,x->x[1]);;
gap> OrientableManifolds:=Filtered(Manifolds,m->Homology(m,3)=[0]);;
gap> NonOrientableManifolds:=Filtered(Manifolds,m->Homology(m,3)=[]);;
gap> Length(OrientableManifolds);
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gap> Length(NonOrientableManifolds);
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