
// Make newform 1170.2.bj.b in Magma, downloaded from the LMFDB on 25 April 2024.
// To make the character of type GrpDrchElt, type "MakeCharacter_1170_bj();"
// To make the character of type GrpDrchElt with Codomain the HeckeField, type "MakeCharacter_1170_bj_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_1170_2_bj_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_1170_2_bj_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 := [256, 0, 332, 0, 132, 0, 20, 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, 1, 0, 0, 0, 0, 0, 0], [16, 2, 10, 0, 1, 0, 0, 0], [32, 172, 0, 116, 0, 20, 0, 1], [48, 60, 8, 68, 0, 16, 0, 1], [32, -60, 8, -68, 0, -16, 0, -1], [544, 268, 544, 132, 128, 20, 8, 1], [-544, 268, -544, 132, -128, 20, -8, 1]];
    Rf_basisdens := [1, 1, 4, 64, 16, 16, 64, 64];
    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_1170_bj();"
function MakeCharacter_1170_bj()
    N := 1170;
    order := 6;
    char_gens := [911, 937, 1081];
    v := [6, 3, 1];
    // 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_1170_bj_Hecke();"
function MakeCharacter_1170_bj_Hecke(Kf)
    N := 1170;
    order := 6;
    char_gens := [911, 937, 1081];
    char_values := [[1, 0, 0, 0, 0, 0, 0, 0], [-1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, -1, 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, 1, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, -1, 0], [2, 0, 0, -1, -1, 0, 0, 1], [0, 1, -1, -1, 0, -1, 1, 0], [0, 0, 1, -1, 1, -1, 1, 1], [1, 0, -1, 2, -1, 0, 0, -1], [1, 0, -1, 1, -1, -1, -1, 0], [2, 0, 0, 0, -1, 0, -1, 1], [0, 0, 0, 2, -1, 1, 0, -1], [1, -1, 0, 0, -1, 1, 0, 0], [0, 1, 1, 5, 0, 0, 0, 0], [-2, 2, -2, 2, -2, -1, -1, 2], [2, 0, -2, 2, -2, -2, -2, 0], [0, 0, 0, 0, -3, -3, -1, 1], [-4, -1, 0, 6, 1, -1, 2, 2], [-2, 0, 0, -2, -2, -2, -2, 0], [-2, 6, -3, 0, 1, -1, 1, 0], [0, 0, 0, -4, 0, 0, 0, 0], [0, 0, -4, 0, 0, 0, 0, 0], [1, -1, 2, 0, 3, 3, 3, -3], [-1, -1, 2, 0, -1, -1, 2, -2], [6, 1, -2, 0, 2, 2, 0, 0], [4, 0, 0, -5, 2, -1, 3, -2], [-1, -2, 1, 0, 0, -1, 1, 1], [0, 1, 1, -2, 1, -1, 0, 1], [-1, 0, 0, -2, 2, -2, 1, 1], [0, -1, 1, -4, 4, 0, 4, -4], [2, 0, 0, 0, -2, 2, -4, -4], [-4, 0, 0, -2, 1, 3, 3, -2], [-2, -2, 2, 3, 1, 3, -2, -1], [3, -3, 6, 0, 2, 2, -1, 1], [3, -2, 1, 0, -3, 0, 0, 3], [7, -6, 3, -3, -1, 3, -3, -2], [-2, 0, 0, -2, 1, 1, 1, 0], [1, 3, 0, -4, 1, -1, 2, 2], [0, -3, 0, -2, 1, -1, 2, 2], [-4, 6, -3, 0, 0, -4, 4, 4], [0, -2, -2, 1, -3, 1, -2, -3], [-3, 0, -3, -3, -1, -1, -1, 0], [0, 0, 0, 0, -2, 4, 2, -2], [-10, -1, 2, 0, 4, 4, 3, -3], [-3, -6, 3, 6, 0, 3, -3, -3], [0, 2, 2, -10, -1, -1, -2, -1], [0, 3, 3, -13, 6, -1, 5, 6], [4, -4, 2, 2, -2, 4, -4, -2], [0, -1, -1, 13, 0, 3, 3, 0], [0, 0, 0, 5, 2, -1, 1, 2], [-6, 4, -2, 4, 0, -2, 2, 2], [2, -1, 0, -8, 2, -2, 0, 0], [-5, 5, 0, 0, 5, -5, 4, 4], [-9, -3, 0, 24, -3, 3, -4, -4], [-4, 0, 2, -5, -2, -3, -3, 1], [-3, 2, -1, -7, 3, -7, 7, 4], [-8, 0, 0, 6, 3, 5, -2, -3], [-8, 6, -6, 3, 0, -1, 1, 0], [0, -2, 1, 10, -4, 6, -6, -2], [-8, -2, 2, 4, 8, 8, 0, -8], [1, 0, -1, -1, 0, -2, -2, 2], [3, 0, 0, -4, -1, 1, 3, 3], [-24, 4, -4, 10, 0, -2, 2, 0], [6, 6, -3, -13, 0, -7, 7, 7], [-14, -2, 4, 0, -4, -4, -2, 2], [-3, -1, 2, 0, 7, 7, 0, 0], [10, 0, 0, -12, -4, 4, -2, -2], [-3, -3, 6, 0, 4, 4, 4, -4], [12, 0, 0, 10, -2, -4, -4, 2], [-1, 5, 0, 8, -3, 3, -1, -1], [4, 0, 3, 0, 4, 0, 0, 4], [0, -3, 3, -2, 4, 2, 2, -4], [0, -5, -5, -8, 0, -5, -5, 0], [8, 0, 0, -12, -2, 2, -2, -2], [16, 6, -6, -6, -4, -2, -2, 4], [6, 0, -6, 4, 7, 5, 5, 2], [-4, 1, -1, 1, -2, -3, 1, 2], [9, 4, -2, -18, 4, -5, 5, 1], [-6, 3, -6, 0, -4, -4, -5, 5], [2, 2, -1, -7, 3, -2, 2, -1], [-24, 0, 0, 9, 5, 2, 3, -5], [-6, 0, 6, -7, 2, 1, 1, 1], [0, 4, 4, 0, -1, 2, 1, -1], [4, 5, 0, 0, -4, 4, 3, 3], [-6, -3, 3, 0, -1, -4, 3, 1], [-6, 0, 2, -10, 7, 3, 3, 4], [0, 1, 1, 10, -3, 0, -3, -3], [-10, 4, 0, 16, 2, -2, 0, 0], [2, 0, 6, -3, -1, -6, -6, 5], [0, -3, -3, -2, 4, -3, 1, 4], [2, 0, 11, 0, 1, -1, -1, 2], [13, 6, -12, 0, -5, -5, -4, 4], [6, 0, 0, 0, -6, 6, 4, 4], [10, 5, -5, -6, -1, -2, 1, 1], [-13, 4, -2, 15, 1, 3, -3, -4], [0, 1, 1, 19, -2, 5, 3, -2], [-9, -6, 0, 28, -5, 5, -10, -10], [-3, 0, -12, -1, 1, 3, 3, -2], [-8, -2, 2, -2, 7, 1, 6, -7], [3, 4, -8, 0, 0, 0, 4, -4], [4, 0, 0, 0, 2, 4, -2, -2], [-4, -7, 0, 0, 4, -4, 1, 1], [2, -2, 0, 12, -8, 8, -6, -6], [0, -1, -1, 15, -3, -6, -9, -3], [2, 0, 6, -2, -2, -6, -6, 4], [0, 4, 4, 5, -1, -5, -6, -1], [-10, 5, -10, 0, -3, -3, -3, 3], [13, -5, 10, 0, 1, 1, -3, 3], [0, 0, 0, 16, -4, 0, -4, -4], [6, 4, -8, 0, -10, -10, -5, 5], [-24, 2, -4, 0, 0, 0, 4, -4], [0, 4, 4, -7, 0, 4, 4, 0], [-5, 0, -2, -13, 5, -3, -3, 8], [0, -1, -1, 3, -2, -4, -6, -2], [-12, 0, 0, 4, 3, -5, 5, 2], [-6, 7, 0, 10, 1, -1, 3, 3], [-2, 0, -2, -10, 2, -6, -6, 8], [-12, -4, 2, 17, 2, 7, -7, -9], [14, 6, -3, -18, -2, -6, 6, 8], [-12, -8, 8, 9, 6, 9, -3, -6], [-4, -9, 9, 3, 2, 3, -1, -2], [3, 0, 0, 12, -10, 5, -5, 5], [-28, 9, -9, 6, 7, -1, 8, -7], [4, 4, -4, 0, -5, -3, -2, 5], [2, 4, 0, -8, 2, -2, 0, 0], [0, -4, 2, -4, 0, -4, 4, 4], [6, -1, 1, -5, -7, -9, 2, 7], [6, 1, -2, 0, -6, -6, 2, -2], [-6, 0, -9, -8, -5, -7, -7, 2], [0, -12, 6, 6, -6, 0, 0, 6], [-4, 2, 0, -2, 5, -5, 9, 9], [-17, 5, -10, 0, 0, 0, 10, -10], [26, -1, 1, -7, -5, 1, -6, 5], [0, 0, 0, 6, 1, 4, 5, 1], [0, 2, 2, 0, -8, 0, -8, -8], [-14, -3, 3, 3, 11, 7, 4, -11], [-1, 0, 6, -13, 13, 1, 1, 12], [-26, 10, -10, 6, 1, -6, 7, -1], [6, 2, -1, -1, -3, 2, -2, 1], [8, -10, 5, 4, -8, 4, -4, 4], [-9, 0, 4, -12, 12, 9, 9, 3], [0, 6, 6, 0, -2, 1, -1, -2], [9, -1, 0, -18, 0, 0, 5, 5], [-20, 9, -9, 6, -2, -6, 4, 2], [-1, 0, -4, -5, 1, -3, -3, 4], [-18, 5, -10, 0, -6, -6, -4, 4], [0, -2, -2, -2, 5, -1, 4, 5], [5, 0, 1, 0, 12, 7, 7, 5], [25, 0, 0, 0, -3, -3, -3, 3], [-3, 3, 0, -8, 7, -7, 9, 9], [14, 1, -2, 0, 9, 9, 9, -9], [-9, 6, -12, 0, 1, 1, 0, 0], [-22, 12, -6, 22, -1, -1, 1, 2], [0, -8, -8, 11, -4, -2, -6, -4], [-8, 9, 0, 4, 6, -6, 6, 6], [32, -8, 8, -13, 0, 3, -3, 0], [4, 1, -1, -10, 6, -2, 8, -6], [42, 0, 0, 0, 0, 0, 2, -2], [-20, 0, 0, 10, 2, -8, 8, 6], [-8, 0, 4, -8, 5, 5, 5, 0], [16, 0, 0, -32, 0, 0, -3, -3], [12, 0, 0, -20, -2, 2, -2, -2], [0, 5, 5, 16, -2, -4, -6, -2], [-9, 0, 3, -6, 2, 5, 5, -3], [7, 0, 0, 0, 4, 4, 5, -5], [-12, -6, 3, 7, -1, -6, 6, 7], [0, 6, 6, 10, -1, 3, 2, -1], [-6, -4, 8, 0, -3, -3, 1, -1], [0, 0, 0, 16, -4, 8, 4, -4], [-20, 0, 1, -23, 4, 1, 1, 3], [5, 4, 0, -14, 2, -2, -1, -1], [9, -2, 0, 0, -9, 9, 5, 5], [6, -12, 0, -12, 0, 0, 2, 2], [-8, 0, 12, -10, 1, -1, -1, 2], [-3, 14, -7, 10, -4, 3, -3, 1], [8, -12, 6, -16, 7, -1, 1, -6], [-16, 0, 0, 0, 6, 6, -6, 6], [27, 16, -8, -29, -2, -4, 4, 6], [16, -6, 6, -6, -4, -2, -2, 4], [12, -11, 0, -28, 2, -2, 1, 1], [22, -4, 4, -16, 5, 0, 5, -5], [0, -4, -4, -8, 12, -6, 6, 12], [-23, -6, 12, 0, -1, -1, -4, 4], [24, 1, -2, 0, -1, -1, -3, 3], [-15, -3, 0, 30, 0, 0, 6, 6], [24, 8, -16, 0, -2, -2, -4, 4], [0, -2, -2, -31, 11, -11, 0, 11], [-6, 6, -3, -8, 15, 1, -1, -16], [-6, -11, 0, 22, -5, 5, -3, -3], [16, -8, 16, 0, 6, 6, -10, 10], [20, 2, -2, -23, 3, -10, 13, -3], [-13, 0, 3, -10, -2, 1, 1, -3], [5, 0, 3, -6, 1, -10, -10, 11], [18, 16, -8, -16, -8, -6, 6, 14], [5, 1, -2, 0, 8, 8, 3, -3], [-16, -11, 11, 12, -4, 0, -4, 4], [0, 0, 12, 0, -4, -4, -4, 0], [-26, -5, 5, 16, 9, 12, -3, -9], [0, -12, 0, 8, -4, 4, -11, -11], [1, 0, -3, 11, -14, -4, -4, -10], [-12, 2, -4, 0, 0, 0, -3, 3], [-2, 12, 0, -4, 4, -4, -6, -6], [-4, 0, -6, -4, -5, -5, -5, 0], [-5, 10, -5, 22, -12, 5, -5, 7], [0, 8, 8, 2, -1, 11, 10, -1], [-4, -2, 4, 0, 3, 3, -10, 10], [8, 5, -5, -7, 12, 9, 3, -12], [-20, 4, -4, 8, 1, -1, 2, -1], [0, 16, 0, -16, 8, -8, 8, 8], [4, 0, -6, -6, 10, 0, 0, 10], [24, -6, 6, -7, -11, -6, -5, 11], [10, 14, -7, -17, -1, -8, 8, 9], [-2, 11, -11, -12, 0, -13, 13, 0], [12, -7, 14, 0, 4, 4, -2, 2], [-28, -10, 10, 19, 6, 11, -5, -6], [18, 8, -4, -18, -6, -6, 6, 12], [-18, 0, 0, -20, -4, -6, -6, 2], [-4, 2, 0, -10, 9, -9, 8, 8], [11, 8, 0, -8, -7, 7, 0, 0], [-3, -16, 8, 9, 0, 6, -6, -6], [0, -8, -8, 19, -14, 5, -9, -14], [33, 1, -2, 0, 4, 4, 1, -1], [0, 1, 1, 8, 5, -3, 2, 5], [-6, 16, 0, -4, 8, -8, 14, 14], [-15, 0, 0, 34, -2, 2, 4, 4], [23, -12, 6, -26, 4, 1, -1, -5], [20, -1, 1, -24, 6, -8, 14, -6], [14, 10, -20, 0, 6, 6, 1, -1], [50, -5, 5, -18, -8, -1, -7, 8], [-15, 10, -5, 12, 6, 3, -3, -9], [-7, 0, -6, -12, 4, -1, -1, 5], [11, -9, 0, -6, -8, 8, 7, 7], [-18, 3, -3, 1, 10, 2, 8, -10], [0, 3, 3, 23, -5, 11, 6, -5], [-2, -7, 7, -8, 13, 4, 9, -13], [24, 4, -8, 0, 11, 11, -2, 2], [-24, 6, 0, 52, -2, 2, 2, 2], [6, -2, 4, 0, 5, 5, 1, -1], [19, 0, 2, 26, -6, 1, 1, -7], [0, -6, -6, 14, -11, 3, -8, -11], [6, 18, -9, -9, -5, -8, 8, 13], [0, -3, -3, 26, -15, 8, -7, -15], [0, 6, 6, -4, 6, -4, 2, 6], [0, 2, 2, -12, -8, 0, -8, -8], [8, 0, 0, -3, 7, -4, -4, 11], [-8, 16, -16, 10, -13, -7, -6, 13], [-3, -6, 3, 6, -1, 2, -2, -1], [33, 5, -10, 0, -21, -21, -12, 12], [23, -8, 4, -26, 0, -3, 3, 3], [-10, 9, -9, 17, -7, 5, -12, 7], [-14, 0, -9, -27, -1, -14, -14, 13], [6, -12, 12, -9, 1, -5, 6, -1], [0, 2, 2, -10, 2, -16, -14, 2], [-10, 0, 0, -3, -3, -11, 8, 3], [3, -2, 4, 0, 4, 4, 13, -13], [0, -4, -4, 0, -6, 5, -1, -6], [21, -3, 0, -18, -12, 12, -11, -11], [12, 0, 3, -3, 7, -8, -8, 15], [22, 22, -11, -34, -4, -16, 16, 20], [0, -2, -2, 24, 2, 0, 2, 2], [-25, 15, 0, 46, 2, -2, 5, 5], [-31, -14, 7, 28, -3, -6, 6, 9], [14, -10, 0, 6, -17, 17, -11, -11], [-4, -7, 7, 2, -10, -10, 0, 10], [-6, 8, 0, 8, 2, -2, -3, -3], [14, 14, -14, -4, -2, 1, -3, 2], [-6, -8, 4, -22, 15, -13, 13, -2], [43, 0, 0, -40, -6, -3, 3, 9], [8, 0, 2, -4, 0, -12, -12, 12], [-11, -4, 0, 22, 0, 0, -8, -8], [14, 14, -7, -4, -8, 2, -2, 6], [24, 0, -6, 20, -11, -15, -15, 4], [2, 1, -2, 0, 0, 0, -3, 3], [16, -3, 6, 0, -14, -14, -6, 6], [0, 1, 1, 2, 0, -3, -3, 0], [-17, -6, 3, 20, 2, 5, -5, -7], [-12, 0, -12, -20, 4, -4, -4, 8], [0, -6, -6, 2, -5, 16, 11, -5], [-36, -20, 10, 42, 2, 8, -8, -10], [-12, -13, 0, 28, -2, 2, -5, -5], [1, 0, 2, -2, -7, -10, -10, 3], [0, 20, -10, -4, -4, -8, 8, 12], [2, -2, 2, -3, 7, 5, 2, -7], [12, -2, 2, -10, -2, -6, 4, 2], [3, -6, 0, 24, -15, 15, -8, -8], [-12, -10, 10, 18, 7, 19, -12, -7], [-14, 5, -10, 0, 0, 0, 6, -6], [-33, -3, 6, 0, -9, -9, 2, -2], [-14, -4, 0, 52, -12, 12, -7, -7], [21, -3, 6, 0, -6, -6, -8, 8], [-14, 0, 18, -18, 14, 10, 10, 4], [39, 0, 0, -25, -12, 2, -2, 10], [0, -1, -1, -14, 14, -12, 2, 14], [0, 0, -15, -4, -8, -12, -12, 4], [0, -4, -4, 60, -7, -1, -8, -7], [-19, 0, 15, -15, -1, 3, 3, -4], [-6, 0, 0, 0, -12, -6, -6, -6], [0, 2, -4, 0, 12, 12, 13, -13], [-31, 1, -2, 0, 9, 9, 6, -6], [-36, -9, 9, 19, -1, 0, -1, 1], [0, 8, 8, -28, 7, 6, 13, 7], [0, 5, 5, -20, 12, -4, 8, 12], [-6, 0, -18, 6, -15, -3, -3, -12], [-21, 0, 0, 0, -5, -5, -11, 11], [0, 12, 12, -14, 2, -10, -8, 2]];
    aps := ConvertToHeckeField(raw_aps);
    chi := MakeCharacter_1170_bj_Hecke(Universe(aps));
    return ExtendMultiplicatively(weight, aps, chi);
end function;


// To make the newform (type ModFrm), type "MakeNewformModFrm_1170_2_bj_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_1170_2_bj_b(:prec:=8)
    chi := MakeCharacter_1170_bj();
    f_vec := qexpCoeffs();
    Kf := Universe(f_vec);
    // SetVerbose("ModularForms", true);
    // SetVerbose("ModularSymbols", true);
    S := CuspidalSubspace(ModularForms(chi, 2));
    S := BaseChange(S, Kf);
    maxprec := NextPrime(1999) - 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_1170_2_bj_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_1170_2_bj_b( : sign := -1)
    R<x> := PolynomialRing(Rationals());
    chi := MakeCharacter_1170_bj();
    // SetVerbose("ModularSymbols", true);
    Snew := NewSubspace(CuspidalSubspace(ModularSymbols(chi,2,sign)));
    Vf := Kernel([<7,R![2704, 1924, 1837, 187, 214, -29, 34, -5, 1]>,<17,R![4, -84, 572, 336, -144, -120, 83, -15, 1]>],Snew);
    return Vf;
end function;