diff --git a/AutFN_orbit.jl b/AutFN_orbit.jl new file mode 100644 index 0000000..b820d31 --- /dev/null +++ b/AutFN_orbit.jl @@ -0,0 +1,108 @@ +include("Orb_AutFN.jl") + +############################################################################### +# +# Action of WreathProductElems on AutGroupElem +# +############################################################################### + +function AutFG_emb(A::AutGroup, g::WreathProductElem) + isa(A.objectGroup, FreeGroup) || throw("Not an Aut(Fₙ)") + parent(g).P.n == length(A.objectGroup.gens) || throw("No natural embedding of $(parent(g)) into $A") + powers = [(elt == parent(elt)() ? 0: 1) for elt in g.n.elts] + elt = reduce(*, [A(Groups.flip_autsymbol(i))^pow for (i,pow) in enumerate(powers)]) + Groups.r_multiply!(elt, [Groups.perm_autsymbol(g.p)]) + return elt +end + +function (g::WreathProductElem)(a::AutGroupElem) + g = AutFG_emb(parent(a),g) + return g*a*g^-1 +end + +############################################################################### +# +# Generating set +# +############################################################################### + +function SOutFN_generating_set(N::Int) + + SOutFN = AutGroup(FreeGroup(N), special=true, outer=true) + S = generators(SOutFN); + S = [S; [inv(s) for s in S]] + + return SOutFN, unique(S) +end + +############################################################################### +# +# Parsing command line +# +############################################################################### + +function parse_commandline() + settings = ArgParseSettings() + + @add_arg_table settings begin + "--tol" + help = "set numerical tolerance for the SDP solver (default: 1e-5)" + arg_type = Float64 + default = 1e-5 + "--iterations" + help = "set maximal number of iterations for the SDP solver (default: 20000)" + arg_type = Int + default = 20000 + "--upper-bound" + help = "Set an upper bound for the spectral gap (default: Inf)" + arg_type = Float64 + default = Inf + "--cpus" + help = "Set number of cpus used by solver (default: auto)" + arg_type = Int + required = false + "-N" + help = "Consider automorphisms of free group on N generators (default: N=2)" + arg_type = Int + default = 2 + "--radius" + help = "Find the decomposition over B_r(e,S)" + arg_type = Int + default = 2 + end + + return parse_args(settings) +end + +############################################################################### +# +# main +# +############################################################################### + +function main() + parsed_args = parse_commandline() + + N = parsed_args["N"] + dirname = "SOutF$(N)_E_r=$radius" + radius = parsed_args["radius"] + + isdir(dirname) || mkdir(dirname) + logger = PropertyT.setup_logging(dirname) + + G, S = SOutFN_generating_set(logger, dirname, N) + info(logger, G) + info(logger, "Symmetric generating set of size $(length(S))") + info(logger, S) + AutS = WreathProduct(Nemo.FiniteField(2,1, "a")[1], PermutationGroup(N)) + + tol = parsed_args["tol"] + iterations = parsed_args["iterations"] + upper_bound = parsed_args["upper-bound"] + + solver = SCS.SCSSolver(eps=tol, max_iters=iterations, verbose=true, linearsolver=SCS.Indirect) + + orbit_check_propertyT(logger, dirname, G, S, AutS, solver, upper_bound) +end + +main()