
// Make newform 430.2.b.b in Magma, downloaded from the LMFDB on 25 April 2024.
// To make the character of type GrpDrchElt, type "MakeCharacter_430_b();"
// To make the character of type GrpDrchElt with Codomain the HeckeField, type "MakeCharacter_430_b_Hecke();"
// To make the coeffs of the qexp of the newform in the Hecke field type "qexpCoeffs();"
// To make the newform (type ModFrm), type "MakeNewformModFrm_430_2_b_b();".
// This may take a long time!  To see verbose output, uncomment the SetVerbose lines below.
// The precision argument determines an initial guess on how many Fourier coefficients to use.
// This guess is increased enough to uniquely determine the newform.
// To make the Hecke irreducible modular symbols subspace (type ModSym)
// containing the newform, type "MakeNewformModSym_430_2_b_b();".
// This may take a long time!  To see verbose output, uncomment the SetVerbose line below.
// The default sign is -1.  You can change this with the optional parameter "sign".
function ConvertToHeckeField(input: pass_field := false, Kf := [])
    if not pass_field then
        poly := [529, 0, 4754, 0, 15229, 0, 20990, 0, 12216, 0, 3518, 0, 525, 0, 38, 0, 1];
        Kf := NumberField(Polynomial([elt : elt in poly]));
        AssignNames(~Kf, ["nu"]);
    end if;
    Rf_num := [[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [-3262, 0, -17383, 0, -24981, 0, -10113, 0, -1182, 0, 95, 0, 25, 0, 1, 0], [2023, 0, 16597, 0, 36294, 0, 22052, 0, 5838, 0, 750, 0, 45, 0, 1, 0], [-1031, 0, -7809, 0, -17188, 0, -13439, 0, -4811, 0, -850, 0, -70, 0, -2, 0], [133952, 163506, 761323, 999334, 1365211, 1778408, 850793, 1128824, 248492, 339056, 36915, 51940, 2645, 3830, 69, 102], [-133952, 163506, -761323, 999334, -1365211, 1778408, -850793, 1128824, -248492, 339056, -36915, 51940, -2645, 3830, -69, 102], [0, -43831, 0, -320439, 0, -677433, 0, -463499, 0, -145796, 0, -23065, 0, -1740, 0, -47], [0, -174267, 0, -1061823, 0, -2036336, 0, -1301368, 0, -385532, 0, -57800, 0, -4165, 0, -109], [484518, 2289, 3080942, 223591, 5861274, 699797, 3677792, 442666, 1063198, 116569, 154790, 14625, 10810, 845, 276, 18], [468418, 161217, 3042647, 775743, 6077359, 1078611, 4063387, 686158, 1257318, 222487, 196075, 37315, 14605, 2985, 391, 84], [-388424, 207693, -2602726, 1138732, -5266172, 2007664, -3575166, 1309277, -1126034, 406003, -178940, 64060, -13570, 4840, -368, 131], [388424, 207693, 2602726, 1138732, 5266172, 2007664, 3575166, 1309277, 1126034, 406003, 178940, 64060, 13570, 4840, 368, 131], [-585281, -17225, -3824164, -464660, -7575878, -1480100, -4945989, -1137065, -1491481, -380975, -227010, -62940, -16560, -4900, -437, -135], [-196857, 796912, -1221438, 5082668, -2309706, 9785196, -1370823, 6351808, -365447, 1915152, -48070, 291960, -2990, 21340, -69, 564], [196857, 796912, 1221438, 5082668, 2309706, 9785196, 1370823, 6351808, 365447, 1915152, 48070, 291960, 2990, 21340, 69, 564]];
    Rf_basisdens := [1, 1, 100, 100, 50, 4600, 4600, 1150, 2300, 4600, 4600, 4600, 4600, 4600, 4600, 4600];
    Rf_basisnums := ChangeUniverse([[z : z in elt] : elt in Rf_num], Kf);
    Rfbasis := [Rf_basisnums[i]/Rf_basisdens[i] : i in [1..Degree(Kf)]];
    inp_vec := Vector(Rfbasis)*ChangeRing(Transpose(Matrix([[elt : elt in row] : row in input])),Kf);
    return Eltseq(inp_vec);
end function;


// To make the character of type GrpDrchElt, type "MakeCharacter_430_b();"
function MakeCharacter_430_b()
    N := 430;
    order := 2;
    char_gens := [87, 261];
    v := [1, 2];
    // chi(gens[i]) = zeta^v[i]
    assert UnitGenerators(DirichletGroup(N)) eq char_gens;
    F := CyclotomicField(order);
    chi := DirichletCharacterFromValuesOnUnitGenerators(DirichletGroup(N,F),[F|F.1^e:e in v]);
    return MinimalBaseRingCharacter(chi);
end function;

// To make the character of type GrpDrchElt with Codomain the HeckeField, type "MakeCharacter_430_b_Hecke();"
function MakeCharacter_430_b_Hecke(Kf)
    N := 430;
    order := 2;
    char_gens := [87, 261];
    char_values := [[-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]];
    assert UnitGenerators(DirichletGroup(N)) eq char_gens;
    values := ConvertToHeckeField(char_values : pass_field := true, Kf := Kf); // the value of chi on the gens as elements in the Hecke field
    F := Universe(values);// the Hecke field
    chi := DirichletCharacterFromValuesOnUnitGenerators(DirichletGroup(N,F),values);
    return chi;
end function;


function ExtendMultiplicatively(weight, aps, character)
    prec := NextPrime(NthPrime(#aps)) - 1; // we will able to figure out a_0 ... a_prec
    primes := PrimesUpTo(prec);
    prime_powers := primes;
    assert #primes eq #aps;
    log_prec := Floor(Log(prec)/Log(2)); // prec < 2^(log_prec+1)
    F := Universe(aps);
    FXY<X, Y> := PolynomialRing(F, 2);
    // 1/(1 - a_p T + p^(weight - 1) * char(p) T^2) = 1 + a_p T + a_{p^2} T^2 + ...
    R<T> := PowerSeriesRing(FXY : Precision := log_prec + 1);
    recursion := Coefficients(1/(1 - X*T + Y*T^2));
    coeffs := [F!0: i in [1..(prec+1)]];
    coeffs[1] := 1; //a_1
    for i := 1 to #primes do
        p := primes[i];
        coeffs[p] := aps[i];
        b := p^(weight - 1) * F!character(p);
        r := 2;
        p_power := p * p;
        //deals with powers of p
        while p_power le prec do
            Append(~prime_powers, p_power);
            coeffs[p_power] := Evaluate(recursion[r + 1], [aps[i], b]);
            p_power *:= p;
            r +:= 1;
        end while;    
    end for;
    Sort(~prime_powers);
    for pp in prime_powers do
        for k := 1 to Floor(prec/pp) do
            if GCD(k, pp) eq 1 then
                coeffs[pp*k] := coeffs[pp]*coeffs[k];
            end if;
        end for;
    end for;
    return coeffs;
end function;


function qexpCoeffs()
    // To make the coeffs of the qexp of the newform in the Hecke field type "qexpCoeffs();"
    weight := 2;
    raw_aps := [[0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, -1, 0, 0, 1, 1, 0, 0, 0, 0, 0], [0, -1, 0, 0, 0, -1, -1, -1, -1, 0, 0, 0, 1, 1, -1, 0], [0, -1, 1, 0, 0, 0, -1, -1, 0, 1, -1, 1, 1, 0, 1, 1], [-2, 0, 0, -1, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, -1, 0, -1], [0, 0, -1, -1, 1, 0, 1, 0, 0, -1, -1, -1, 1, 0, -1, 1], [4, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, -1, -1, 0, 0, 0, 0, -2, -1, 1, -1, 0], [2, 0, 1, 1, 1, -1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0], [0, -2, 1, 0, 0, 1, 0, -2, 0, 1, -1, 1, 2, 1, 0, 1], [0, 1, 0, 0, 0, 1, 1, 1, 2, 0, 0, -2, -1, 1, -1, 0], [0, 0, 0, 0, 2, -2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0], [4, 0, 0, -1, -2, 0, -1, 0, 0, 1, 1, 2, -2, 0, 0, 0], [0, 1, 2, 0, 0, 3, 1, 3, 3, 2, -2, 0, 0, 0, 1, 1], [2, 0, 1, 0, -1, -1, 2, 0, 0, -1, -1, -1, 1, 0, 0, 0], [0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, -2, -2, 1, -1], [-2, 0, -2, 1, 2, 0, -1, 0, 0, 1, 1, 1, -1, 0, 2, -2], [0, -1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 4, 3, -1, 1, 0], [2, 0, 0, 2, 2, 0, 1, 0, 0, -1, -1, 0, 0, 0, 2, -2], [0, 1, -2, 0, 0, -3, -1, 3, 0, -2, 2, -1, -1, 0, -1, -1], [4, 0, -1, -4, -5, 1, -2, 0, 0, 1, 1, 1, -1, 0, 0, 0], [0, -4, 0, 0, 0, -2, -2, -2, -2, 0, 0, -1, -1, 0, 0, 0], [0, 0, -2, 0, 0, -2, 0, 0, -1, -2, 2, 0, 1, 1, -2, -1], [-2, 0, 2, 0, 2, 0, 2, 0, 0, -2, -2, 0, 0, 0, -2, 2], [0, 0, 0, 0, 0, 0, 0, -2, -1, 0, 0, -2, 1, 3, 0, 3], [0, 2, -1, 0, 0, 1, 2, 2, 0, -1, 1, 1, 1, 0, 0, 0], [2, 0, -3, 4, 1, -2, 2, 0, 0, 0, 0, -3, 3, 0, 1, -1], [0, 2, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, 1, 1, 0, 1], [-4, 0, 2, 0, 0, 2, -1, 0, 0, -1, -1, 0, 0, 0, -2, 2], [2, 0, 0, 1, -4, -1, 0, 0, 0, 1, 1, 4, -4, 0, 3, -3], [4, 0, 0, 0, 0, 2, 0, 0, 0, -2, -2, 2, -2, 0, 2, -2], [0, 0, 0, 0, 0, -1, -1, 4, 2, 0, 0, -6, -1, 5, -4, 1], [0, 0, 0, 0, 0, -1, -1, 2, 2, 0, 0, -6, -4, 2, -2, 0], [0, 0, -2, 0, 0, 0, 2, 2, -4, -2, 2, 2, -1, -3, 2, -1], [0, -1, 0, 0, 0, 3, 3, -5, 3, 0, 0, -2, -3, -1, 1, 0], [2, 0, -2, -7, -2, -1, -1, 0, 0, 2, 2, 2, -2, 0, 0, 0], [4, 0, -3, 2, 5, 1, 0, 0, 0, -1, -1, 1, -1, 0, 2, -2], [2, 0, 1, 0, -1, 1, 0, 0, 0, -1, -1, -1, 1, 0, -2, 2], [0, 4, 0, 0, 0, 0, 0, -4, 0, 0, 0, 1, -3, -4, 2, -2], [0, -2, 0, 0, 0, 0, 0, 0, -1, 0, 0, -2, 2, 4, -4, 0], [-2, 0, -1, 2, 3, -3, 4, 0, 0, -1, -1, 1, -1, 0, 0, 0], [0, 0, 2, 2, 0, 1, -1, 0, 0, 0, 0, -2, 2, 0, 1, -1], [0, -1, 0, 0, 0, -1, -1, 1, 2, 0, 0, 0, -3, -3, -1, -4], [0, 0, 0, 0, 0, 1, 1, -2, 2, 0, 0, 2, 2, 0, -2, -2], [-6, 0, -4, 4, 2, 0, 0, 0, 0, 0, 0, -2, 2, 0, 2, -2], [0, 5, 0, 0, 0, -1, -1, 1, 0, 0, 0, 0, -5, -5, 1, -4], [-2, 0, 2, 5, 10, -4, 7, 0, 0, -3, -3, -3, 3, 0, -2, 2], [6, 0, 2, -2, 2, 4, -1, 0, 0, -3, -3, -2, 2, 0, -2, 2], [-4, 0, 0, 2, 4, 0, 0, 0, 0, 0, 0, -2, 2, 0, -2, 2], [0, -2, 0, 0, 0, 2, 2, -4, 1, 0, 0, -4, -3, 1, -2, -1], [0, 1, 0, 0, 0, 3, 3, -1, 3, 0, 0, 2, 3, 1, -1, 0], [2, 0, 0, 2, 0, 0, 2, 0, 0, -2, -2, -4, 4, 0, 0, 0], [0, 0, -3, -1, 3, -1, 0, 0, 0, 1, 1, -4, 4, 0, 0, 0], [0, -2, 0, 0, 0, -3, -3, -2, -2, 0, 0, 0, 0, 0, 2, 2], [-2, 0, -2, 5, 1, -2, 3, 0, 0, -1, -1, -4, 4, 0, 2, -2], [0, -2, 2, 0, 0, 2, 0, 2, 3, 2, -2, 4, 3, -1, 4, 3], [0, -4, 4, 0, 0, 0, -4, -6, 4, 4, -4, -2, 0, 2, 0, 2], [0, -4, 2, 0, 0, 2, 0, -4, -3, 2, -2, 2, 1, -1, 0, -1], [-8, 0, 0, 3, -6, 0, -3, 0, 0, 3, 3, 2, -2, 0, 4, -4], [0, 2, -4, 0, 0, -2, 2, 4, -4, -4, 4, 2, 0, -2, 2, 0], [0, -4, 0, 0, 0, 0, 0, 10, -1, 0, 0, 0, -2, -2, 0, -2], [4, 0, -1, 0, -5, 3, -1, 0, 0, -2, -2, 1, -1, 0, 0, 0], [0, -6, -1, 0, 0, -5, -4, -4, -4, -1, 1, -1, 3, 4, -4, 0], [0, -3, 2, 0, 0, 4, 2, -7, 2, 2, -2, 0, -4, -4, 3, -1], [-14, 0, 2, 2, 4, -1, 3, 0, 0, -2, -2, -4, 4, 0, -3, 3], [0, 1, 2, 0, 0, 5, 3, -1, 4, 2, -2, 2, -2, -4, 1, -3], [18, 0, -3, 3, 2, 1, -1, 0, 0, 0, 0, -3, 3, 0, -2, 2], [0, -8, -1, 0, 0, -1, 0, -4, -4, -1, 1, 1, 5, 4, -2, 2], [0, -8, 4, 0, 0, 1, -3, -8, 0, 4, -4, 2, 1, -1, 4, 3], [-4, 0, -2, -4, -8, -2, 0, 0, 0, 2, 2, 2, -2, 0, 2, -2], [0, 3, 0, 0, 0, 3, 3, 13, 1, 0, 0, 4, 3, -1, -1, -2], [4, 0, 2, -2, 2, -2, -2, 0, 0, 4, 4, 2, -2, 0, 0, 0], [0, -5, 0, 0, 0, 1, 1, -1, -2, 0, 0, 4, 1, -3, 3, 0], [-6, 0, 2, -1, -5, 2, -1, 0, 0, -1, -1, 0, 0, 0, 2, -2], [2, 0, 2, 6, 2, 0, 1, 0, 0, -1, -1, -2, 2, 0, 0, 0], [14, 0, 0, 5, -8, -2, 0, 0, 0, 2, 2, -2, 2, 0, 2, -2], [-2, 0, 3, -5, -5, 0, 1, 0, 0, -1, -1, 5, -5, 0, -2, 2], [-16, 0, -2, 2, 9, -6, 7, 0, 0, -1, -1, 0, 0, 0, 0, 0], [0, 1, -4, 0, 0, -3, 1, 5, 1, -4, 4, -4, -2, 2, -1, 1], [-6, 0, -3, 2, 2, 1, -2, 0, 0, 1, 1, 3, -3, 0, 2, -2], [0, 0, -2, 0, 0, -6, -4, 4, -5, -2, 2, 2, 1, -1, 2, 1], [6, 0, 4, -2, -2, 2, -5, 0, 0, 3, 3, 0, 0, 0, 0, 0], [0, 0, 4, 0, 0, 6, 2, -10, 4, 4, -4, -6, -2, 4, -2, 2], [0, 0, -3, -4, -3, 3, -2, 0, 0, -1, -1, 3, -3, 0, -2, 2], [0, -8, 0, 0, 0, 0, 0, 8, -3, 0, 0, 2, 6, 4, -4, 0], [0, 5, 0, 0, 0, -2, -2, -7, 0, 0, 0, -4, -2, 2, -2, 0], [-2, 0, -2, -2, 0, 0, 0, 0, 0, 0, 0, 3, -3, 0, 2, -2], [0, 6, 0, 0, 0, 6, 6, 0, 4, 0, 0, -1, -2, -1, -2, -3], [-8, 0, 1, -6, -3, 6, -6, 0, 0, 0, 0, 5, -5, 0, -2, 2], [-4, 0, 0, 5, -4, 3, 1, 0, 0, -4, -4, 0, 0, 0, -1, 1], [0, -5, 0, 0, 0, -1, -1, -7, -2, 0, 0, -4, -5, -1, 1, 0], [10, 0, -2, -4, 0, 6, -2, 0, 0, -4, -4, 2, -2, 0, -2, 2], [-2, 0, 2, 0, 2, 0, 1, 0, 0, -1, -1, -6, 6, 0, 0, 0], [0, -11, 0, 0, 0, 4, 4, 13, 0, 0, 0, 4, 4, 0, 0, 0], [2, 0, -4, 2, 2, 0, -4, 0, 0, 4, 4, -2, 2, 0, 2, -2], [0, 8, 0, 0, 0, 2, 2, 12, 4, 0, 0, -10, -8, 2, -2, 0], [0, -11, 2, 0, 0, -1, -3, -15, -5, 2, -2, 8, 11, 3, 1, 4], [0, 5, 4, 0, 0, 7, 3, 7, 5, 4, -4, 2, -2, -4, 5, 1], [10, 0, 0, 7, 2, 2, 0, 0, 0, -2, -2, -4, 4, 0, 4, -4], [6, 0, 3, 1, 5, 2, 2, 0, 0, -4, -4, -1, 1, 0, -3, 3], [0, 5, -2, 0, 0, 1, 3, -3, 1, -2, 2, 0, 0, 0, -3, -3], [0, -5, 2, 0, 0, -1, -3, -11, -4, 2, -2, 6, 6, 0, 3, 3], [0, 3, 0, 0, 0, -1, -1, 3, -1, 0, 0, 6, 2, -4, 1, -3], [6, 0, 3, 6, 2, 3, 2, 0, 0, -5, -5, -3, 3, 0, -2, 2], [2, 0, 2, 2, 2, 0, 0, 0, 0, 0, 0, 2, -2, 0, 4, -4], [0, -3, -4, 0, 0, -5, -1, -5, -10, -4, 4, 6, 1, -5, 3, -2], [0, 11, 0, 0, 0, 1, 1, 11, 3, 0, 0, 0, 1, 1, -1, 0], [0, 4, 0, 0, 0, -4, -4, 8, 0, 0, 0, 1, -1, -2, 2, 0], [-8, 0, 0, 2, 4, 2, 1, 0, 0, -3, -3, 2, -2, 0, 0, 0], [-10, 0, 1, 0, -1, -7, 4, 0, 0, 3, 3, 9, -9, 0, 2, -2], [6, 0, -2, -2, -4, -4, -2, 0, 0, 6, 6, 2, -2, 0, 0, 0], [0, -2, -4, 0, 0, -8, -4, 6, -5, -4, 4, 6, 3, -3, 2, -1], [0, -1, -4, 0, 0, -5, -1, 1, -3, -4, 4, 6, 3, -3, -1, -4], [0, -4, -4, 0, 0, -3, 1, -24, -4, -4, 4, 2, -1, -3, 4, 1], [-4, 0, 4, 6, 0, -2, -1, 0, 0, 3, 3, -2, 2, 0, 2, -2], [4, 0, -3, 6, 3, -5, 4, 0, 0, 1, 1, -5, 5, 0, 4, -4], [0, 3, 4, 0, 0, 7, 3, 11, 9, 4, -4, 2, 0, -2, 1, -1], [0, 6, 4, 0, 0, 3, -1, 10, 0, 4, -4, 0, 0, 0, 2, 2], [0, 4, 0, 0, 0, 2, 2, -4, 0, 0, 0, -2, -2, 0, -2, -2], [0, 0, -1, -4, 7, 3, -1, 0, 0, -2, -2, 1, -1, 0, -4, 4], [-4, 0, 3, -2, -1, 3, -2, 0, 0, -1, -1, 1, -1, 0, -2, 2], [12, 0, 3, -6, -9, 5, -4, 0, 0, -1, -1, -1, 1, 0, -2, 2], [-8, 0, 2, -6, 5, 2, 3, 0, 0, -5, -5, 4, -4, 0, -4, 4], [0, 9, 2, 0, 0, 1, -1, -13, 6, 2, -2, -4, -1, 3, 1, 4], [0, 4, 4, 0, 0, 1, -3, -16, 6, 4, -4, 6, 7, 1, 5, 6], [-10, 0, 7, -1, 5, 0, 2, 0, 0, -2, -2, 3, -3, 0, -1, 1], [0, 0, 2, 0, 0, 2, 0, 8, 1, 2, -2, -2, 0, 2, -4, -2], [2, 0, 1, -4, 1, 1, -2, 0, 0, 1, 1, 7, -7, 0, -4, 4], [0, -4, 0, 0, 0, -1, -1, -4, -6, 0, 0, 0, 6, 6, 1, 7], [6, 0, -2, 4, 0, 0, 4, 0, 0, -4, -4, 4, -4, 0, 0, 0], [-24, 0, -1, -1, 0, -5, -4, 0, 0, 9, 9, 5, -5, 0, 4, -4], [0, -2, 4, 0, 0, 3, -1, -18, 2, 4, -4, -6, 1, 7, -1, 6], [0, -3, -4, 0, 0, -5, -1, -13, -5, -4, 4, -6, 2, 8, -5, 3], [0, 4, 2, 0, 0, 6, 4, 14, 7, 2, -2, 2, -4, -6, 4, -2], [4, 0, 7, 1, -4, -5, 4, 0, 0, 1, 1, 1, -1, 0, -4, 4], [0, 0, -3, -3, 11, -4, 8, 0, 0, -4, -4, 5, -5, 0, -2, 2], [14, 0, 2, 0, -2, 4, -2, 0, 0, -2, -2, 4, -4, 0, 4, -4], [0, 4, -2, 0, 0, -6, -4, -6, -4, -2, 2, -8, -6, 2, -2, 0], [0, -7, 0, 0, 0, -3, -3, -17, -7, 0, 0, 0, 0, 0, -1, -1], [-8, 0, 1, 1, -1, -4, 5, 0, 0, -1, -1, -3, 3, 0, 1, -1], [-2, 0, -5, -2, -5, -1, -2, 0, 0, 3, 3, 3, -3, 0, 0, 0], [0, 0, 0, 0, 0, -2, -2, -2, 4, 0, 0, -8, -6, 2, 0, 2], [0, 1, -6, 0, 0, -3, 3, -5, -4, -6, 6, 3, -3, -6, 3, -3], [4, 0, -5, -1, -7, 2, 0, 0, 0, -2, -2, 3, -3, 0, 2, -2], [0, 1, 2, 0, 0, -1, -3, 11, -6, 2, -2, 2, 3, 1, -1, 0], [0, -3, 2, 0, 0, 5, 3, 5, 6, 2, -2, 0, -5, -5, 1, -4], [-6, 0, 2, -9, -7, 2, -7, 0, 0, 5, 5, -4, 4, 0, -2, 2], [0, 2, -2, 0, 0, 0, 2, 14, -3, -2, 2, -8, -5, 3, -2, 1], [0, 3, -4, 0, 0, -3, 1, -15, -1, -4, 4, -6, -7, -1, -5, -6], [0, -3, 2, 0, 0, 7, 5, -9, 9, 2, -2, -4, -4, 0, 1, 1], [-6, 0, 7, 4, 1, -3, 4, 0, 0, -1, -1, -1, 1, 0, -2, 2], [-16, 0, 6, -7, -1, 2, 2, 0, 0, -4, -4, 2, -2, 0, 0, 0], [-18, 0, 2, 4, 8, -2, 6, 0, 0, -4, -4, -8, 8, 0, -2, 2], [0, -3, 4, 0, 0, 1, -3, -19, 0, 4, -4, -2, -3, -1, 3, 2], [4, 0, 5, 0, 1, 3, -2, 0, 0, -1, -1, 3, -3, 0, 0, 0], [0, 1, 2, 0, 0, 1, -1, 3, 5, 2, -2, -6, 6, 12, -3, 9], [0, 2, -4, 0, 0, 6, 10, -4, 5, -4, 4, 4, -5, -9, 4, -5], [0, -2, 0, 0, 0, -6, -6, 20, 0, 0, 0, -7, 2, 9, -6, 3], [16, 0, 4, 2, 8, -2, 5, 0, 0, -3, -3, -4, 4, 0, -4, 4], [0, -1, -3, 0, 0, -8, -5, 3, -6, -3, 3, -7, -5, 2, 1, 3], [0, 4, -2, 0, 0, 4, 6, 4, 5, -2, 2, -4, -4, 0, 0, 0], [4, 0, 2, -4, -12, 0, -2, 0, 0, 2, 2, -2, 2, 0, 0, 0], [0, 2, 4, 0, 0, 3, -1, 10, 0, 4, -4, 12, 4, -8, 5, -3]];
    aps := ConvertToHeckeField(raw_aps);
    chi := MakeCharacter_430_b_Hecke(Universe(aps));
    return ExtendMultiplicatively(weight, aps, chi);
end function;


// To make the newform (type ModFrm), type "MakeNewformModFrm_430_2_b_b();".
// This may take a long time!  To see verbose output, uncomment the SetVerbose lines below.
// The precision argument determines an initial guess on how many Fourier coefficients to use.
// This guess is increased enough to uniquely determine the newform.
function MakeNewformModFrm_430_2_b_b(:prec:=16)
    chi := MakeCharacter_430_b();
    f_vec := qexpCoeffs();
    Kf := Universe(f_vec);
    // SetVerbose("ModularForms", true);
    // SetVerbose("ModularSymbols", true);
    S := CuspidalSubspace(ModularForms(chi, 2));
    S := BaseChange(S, Kf);
    maxprec := NextPrime(997) - 1;
    while true do
        trunc_vec := Vector(Kf, [0] cat [f_vec[i]: i in [1..prec]]);
        B := Basis(S, prec + 1);
        S_basismat := Matrix([AbsEltseq(g): g in B]);
        if Rank(S_basismat) eq Min(NumberOfRows(S_basismat), NumberOfColumns(S_basismat)) then
            S_basismat := ChangeRing(S_basismat,Kf);
            f_lincom := Solution(S_basismat,trunc_vec);
            f := &+[f_lincom[i]*Basis(S)[i] : i in [1..#Basis(S)]];
            return f;
        end if;
        error if prec eq maxprec, "Unable to distinguish newform within newspace";
        prec := Min(Ceiling(1.25 * prec), maxprec);
    end while;
end function;


// To make the Hecke irreducible modular symbols subspace (type ModSym)
// containing the newform, type "MakeNewformModSym_430_2_b_b();".
// This may take a long time!  To see verbose output, uncomment the SetVerbose line below.
// The default sign is -1.  You can change this with the optional parameter "sign".
function MakeNewformModSym_430_2_b_b( : sign := -1)
    R<x> := PolynomialRing(Rationals());
    chi := MakeCharacter_430_b();
    // SetVerbose("ModularSymbols", true);
    Snew := NewSubspace(CuspidalSubspace(ModularSymbols(chi,2,sign)));
    Vf := Kernel([<3,R![1600, 0, 20260, 0, 41764, 0, 36908, 0, 16933, 0, 4234, 0, 567, 0, 38, 0, 1]>],Snew);
    return Vf;
end function;