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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
Project: cocalc-sagemath-dev-slelievre
Views: 418384#################################################### #################################################### InstallGlobalFunction(QuillenComplex, function(G,p) local SubsCl, Subs, fn, cl, MaxSubs, bool, MaxSimps, K, k, s,t,x,m,mm,tmp; ###################################### if not IsPrimeInt(p) then Print("Second variable is not a prime.\n"); return fail; fi; ###################################### SubsCl:=ConjugacyClassesSubgroups(LatticeByCyclicExtension(G, IsElementaryAbelian, true));; #SubsCl:=Filtered(SubsCl,cl-> IsPGroup(ClassElementLattice(cl,1))); SubsCl:=Filtered(SubsCl,cl-> PrimePGroup(ClassElementLattice(cl,1))=p); SubsCl:=Filtered(SubsCl,cl->Order(ClassElementLattice(cl,1))>1); Subs:=[]; for cl in SubsCl do for x in [1..Size(cl)] do Add(Subs,ClassElementLattice(cl,x)); od; od; Unbind(SubsCl); ################### fn:=function(A,B); return Order(A)>=Order(B); end; ################### Sort(Subs,fn); MaxSimps:=[]; for s in Subs do bool:=true; for t in MaxSimps do if IsSubgroup(t,s) then bool:=false; break; fi; od; if bool then Add(MaxSimps,s); fi; od; Unbind(Subs); MaxSimps:=List(MaxSimps,s->[s]); bool:=true; while bool do bool:=false; for x in [1..Length(MaxSimps)] do if IsBound(MaxSimps[x]) then m:=MaxSimps[x]; if Order(m[Length(m)])>p then for t in MaximalSubgroups(m[Length(m)]) do mm:=Concatenation(m,[t]); Add(MaxSimps,mm); if Order(t)>p then bool:=true; fi; Unbind(MaxSimps[x]); od; fi; fi; od; od; tmp:=MaxSimps; MaxSimps:=[]; for m in tmp do Add(MaxSimps,m); od; Unbind(tmp); K:= MaximalSimplicesToSimplicialComplex(MaxSimps); return K; end); #################################################### #################################################### ###################################################### ###################################################### InstallGlobalFunction(GChainComplex, function(K,G) local Ksimps,R, orbits, stabilizers, stabfn, Dim, boundfn, elts, gg, i,j, k, x, y, m,Action ,ontuples; elts:=Elements(G); Ksimps:=[]; for k in [1..1+Dimension(K)] do Ksimps[k]:=List(K!.simplicesLst[k],x->SSortedList(x)); od; ############################# Action:=function(a,b,c) return 1; end; ############################# ############################# ontuples:=function(x,g) local g1; g1:=g^-1; return SSortedList(OnTuples(x,g1)); end; ############################# orbits:=[]; for k in [1..1+Dimension(K)] do orbits[k]:=OrbitsDomain(G,Ksimps[k], ontuples); od; stabilizers:=[]; for k in [1..1+Dimension(K)] do stabilizers[k]:=[]; for i in [1..Length(orbits[k])] do stabilizers[k][i]:=Stabilizer(G,orbits[k][i][1],ontuples); od;od; ###################### Dim:=function(k); if k<0 or k>Dimension(K) then return 0; fi; return Length(orbits[k+1]); end; ###################### ###################### stabfn:=function(k,i); return stabilizers[k+1][i]; end; ###################### ###################### boundfn:=function(n,i) local V,Vhat, ii, j, m,bnd,g,ob; if n<=0 then return []; fi; V:=orbits[n+1][i][1]; bnd:=[]; for j in [1..Length(V)] do Vhat:=SSortedList(V); RemoveSet(Vhat,V[j]); m:=Vhat; ob:=fail; for ii in [1..Length(orbits[n])] do if m in orbits[n][ii] then ob:=ii; break; fi; od; gg:=fail; for g in [1..Length(elts)] do if ontuples(orbits[n][ob][1],elts[g])=m then gg:=g; break; fi; od; if IsOddInt(j) then Add(bnd,[ob,gg]); else Add(bnd,[-ob,gg]); fi; od; return bnd; end; ###################### R:=Objectify(HapGChainComplex, rec( dimension:=Dim, boundary:=boundfn, homotopy:=fail, elts:=Elements(G), group:=G, stabilizer:=stabfn, action:=Action, properties:= [["length",Dimension(K)], ["characteristic",0], ["type","chaincomplex"]])); return R; end); ###################################################### ######################################################