Quelle  jsc2021-2   Sprache: unbekannt

RT:=Runtime();;
S:=SimplifiedComplex(S);
Size(S);
Y:=DirectProduct(S,S,S,S);;
Y:=SimplifiedComplex(Y);
U:=UniversalCover(Y);
G:=U!.group;;
H:=Group(G.1^5,G.2^5,G.3^5,G.4);;
p:=EquivariantCWComplexToRegularCWMap(U,H);
UH:=Source(p);
Size(UH);
Print("Example runtime :", StringTime(Runtime()-RT), "\n\n");