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https://github.com/kalmarek/SmallHyperbolic
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add reworked FPGroups_GAP.jl
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src/FPGroups_GAP.jl
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178
src/FPGroups_GAP.jl
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using JLD
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using DelimitedFiles
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abstract type WordReduction end
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struct KnuthBendix <: WordReduction end
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struct AutomaticStructure <: WordReduction end
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const GAP_EXECUTABLE = get(ENV, "GAP_EXECUTABLE", "gap")
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const PRODUCT_MATRIX_FUNCTIONS = """
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MetricBalls := function(rws, halfradius)
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local l, basis, sizes, i;
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l := EnumerateReducedWords(rws, 0, halfradius);;
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SortBy(l, Length);
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sizes := [1..halfradius];
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Apply(sizes, i -> Number(l, w -> Length(w) <= i));
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return [l, sizes];
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end;;
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ProductMatrix := function(rws, basis, len)
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local result, dict, g, tmpList, t;
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result := [];
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dict := NewDictionary(basis[1], true);
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t := Runtime();
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for g in [1..Length(basis)] do;
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AddDictionary(dict, basis[g], g);
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od;
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Print("Creating dictionary: \t\t", StringTime(Runtime()-t), "\\n");
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for g in basis{[1..len]} do;
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tmpList := List(Inverse(g)*basis{[1..len]}, w->ReducedForm(rws, w));
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#t := Runtime();
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tmpList := List(tmpList, x -> LookupDictionary(dict, x));
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#Print(Runtime()-t, "\\n");
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Assert(1, ForAll(tmpList, x -> x <> fail));
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Add(result, tmpList);
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od;
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return result;
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end;;
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SaveCSV := function(fname, pm)
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local file, i, j, k;
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file := OutputTextFile(fname, false);;
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for i in pm do;
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k := 1;
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for j in i do;
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if k < Length(i) then
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AppendTo(file, j, ", ");
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else
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AppendTo(file, j, "\\n");
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fi;
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k := k+1;
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od;
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od;
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CloseStream(file);
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end;;
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"""
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function product_matrix_GAP_code(reduction::Type{<:WordReduction},
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G::FPGroup, dir, halfradius; maxeqns=100_000, infolevel=2)
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code = """
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LogTo("$(dir)/GAP.log");
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RequirePackage("kbmag");
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SetInfoLevel(InfoRWS, $infolevel);
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$PRODUCT_MATRIX_FUNCTIONS
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$(GAP_code(G))
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# G:= SimplifiedFpGroup(G);
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rws := KBMAGRewritingSystem(G);
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# ResetRewritingSystem(rws);
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O:=OptionsRecordOfKBMAGRewritingSystem(rws);;
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O.maxeqns := $maxeqns;
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O.maxstates := 1000*$maxeqns;
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#O.maxstoredlen := [100,100];
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before := Runtimes();;
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$reduction(rws);
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after := Runtimes();;
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delta := after.user_time_children - before.user_time_children;;
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Print("$reduction time: \t", StringTime(delta), "\\n");
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t := Runtime();
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res := MetricBalls(rws,$(2halfradius));;
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Print("Metric-Balls generation: \t", StringTime(Runtime()-t), "\\n");
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B := res[1];; sizes := res[2];;
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Print("Sizes of generated Balls: \t", sizes, "\\n");
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t := Runtime();
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pm := ProductMatrix(rws, B, sizes[$halfradius]);;
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Print("Computing ProductMatrix: \t", StringTime(Runtime()-t), "\\n");
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S := EnumerateReducedWords(rws, 1, 1);
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S := List(S, s -> Position(B,s));
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SaveCSV("$(dir)/pm.csv", pm);
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SaveCSV("$(dir)/S.csv", [S]);
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SaveCSV("$(dir)/sizes.csv", [sizes]);
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SaveCSV("$(dir)/B_$(2halfradius).csv", [B]);
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Print("DONE!\\n");
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quit;""";
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return code
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end
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function GAP_code(G::FPGroup)
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S = gens(G);
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rels = [k*inv(v) for (k,v) in G.rels]
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F = "FreeGroup("*join(["\"$v\"" for v in S], ", ") *");"
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m = match(r".*(\[.*\])$", string(rels))
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rels_gap = replace(m.captures[1], " "=>"\n")
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gap_code = """
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F := $F;
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AssignGeneratorVariables(F);;
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relations := $rels_gap;;
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G := F/relations;
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"""
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return gap_code
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end
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function GAP_execute(gap_code, dir)
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isdir(dir) || mkpath(dir)
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GAP_file = joinpath(dir, "GAP_code.g")
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@info "Writing GAP code to $GAP_file"
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open(GAP_file, "w") do io
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write(io, gap_code)
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end
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run(pipeline(`cat $(GAP_file)`, `$GAP_EXECUTABLE -q`))
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end
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function prepare_pm_delta_csv(reduction::Type{<:WordReduction},
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G::FPGroup, name::AbstractString, halfradius::Integer; kwargs...)
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@info "Preparing multiplication table using GAP (via kbmag)"
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gap_code = product_matrix_GAP_code(reduction, G, name, halfradius; kwargs...)
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return GAP_execute(gap_code, name)
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end
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function prepare_pm_delta(reduction::Type{<:WordReduction},
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G::FPGroup, name::AbstractString, halfradius::Integer; kwargs...)
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pm_fname = joinpath(name, "pm.csv")
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S_fname = joinpath(name, "S.csv")
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sizes_fname = joinpath(name, "sizes.csv")
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delta_fname = joinpath(name, "delta.jld")
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csv_files_exist = isfile(pm_fname) && isfile(S_fname) && isfile(sizes_fname)
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if !csv_files_exist
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@info "Creating csv files"
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prepare_pm_delta_csv(reduction, G, name, halfradius; kwargs...)
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elseif isfile(sizes_fname)
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sizes = readdlm(sizes_fname, ',')[1,:]
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if 2halfradius > length(sizes)
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prepare_pm_delta_csv(reduction, G, name, halfradius; kwargs...)
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end
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end
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@assert isfile(pm_fname) && isfile(S_fname) && isfile(sizes_fname)
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@info "Reading csv files"
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pm = Int.(readdlm(pm_fname, ','))
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S = Int.(readdlm(S_fname, ',')[1,:])
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sizes = Int.(readdlm(sizes_fname, ',')[1,:])
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Δ = spzeros(Int, sizes[2halfradius])
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Δ[S] .= -1
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Δ[1] = length(S)
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pm = pm[1:sizes[halfradius], 1:sizes[halfradius]]
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@info "Writing delta.jld for radius $(2halfradius)"
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save(joinpath(name, "delta.jld"), "coeffs", Δ, "pm", pm)
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end
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function prepare_pm_delta(G::FPGroup, dir, halfradius; kwargs...)
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return prepare_pm_delta(KnuthBendix, G, dir, halfradius; kwargs... )
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end
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