
// Make newform 4225.2.a.bq in Magma, downloaded from the LMFDB on 23 April 2024.
// To make the character of type GrpDrchElt, type "MakeCharacter_4225_a();"
// To make the coeffs of the qexp of the newform in the Hecke field type "qexpCoeffs();"
// To make the newform (type ModFrm), type "MakeNewformModFrm_4225_2_a_bq();".
// 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_4225_2_a_bq();".
// 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 := [-1, 0, 10, 0, -8, 0, 1];
        Kf := NumberField(Polynomial([elt : elt in poly]));
        AssignNames(~Kf, ["nu"]);
    end if;
    Rf_num := [[1, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0], [-3, 0, 1, 0, 0, 0], [4, 0, -7, 0, 1, 0], [0, 4, 0, -7, 0, 1], [0, 10, 0, -8, 0, 1]];
    Rf_basisdens := [1, 1, 1, 1, 1, 1];
    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_4225_a();"
function MakeCharacter_4225_a()
    N := 4225;
    order := 1;
    char_gens := [677, 3551];
    v := [1, 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;

function MakeCharacter_4225_a_Hecke(Kf)
    return MakeCharacter_4225_a();
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, 1, 0, 0, 0, 0], [0, -1, 0, 0, 0, 1], [0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 1], [0, 0, 0, 1, 0, 0], [0, 0, 0, 0, 0, 0], [0, 0, 0, 0, -1, 1], [-2, 0, 0, 1, 0, 0], [0, 1, 0, 0, 0, -1], [3, 0, 0, 0, 0, 0], [2, 0, 2, 0, 0, 0], [0, 0, 0, 0, -1, 1], [3, 0, 2, 0, 0, 0], [0, -1, 0, 0, 0, 3], [0, 4, 0, 0, -2, -2], [0, -1, 0, 0, 1, 4], [0, 0, -2, -1, 0, 0], [-1, 0, 0, -2, 0, 0], [0, -3, 0, 0, 0, -1], [-2, 0, 0, -1, 0, 0], [0, 5, 0, 0, -1, -2], [8, 0, -2, 0, 0, 0], [0, -4, 0, 0, -2, 4], [-2, 0, 4, 1, 0, 0], [0, 5, 0, 0, 2, -3], [5, 0, 2, 2, 0, 0], [0, 4, 0, 0, 0, 2], [0, -5, 0, 0, 2, -3], [2, 0, 0, 2, 0, 0], [0, -2, 0, 0, -1, 3], [0, -5, 0, 0, -4, 5], [10, 0, 0, 0, 0, 0], [0, 2, 0, 0, 1, 5], [8, 0, 2, -1, 0, 0], [-5, 0, 6, 2, 0, 0], [10, 0, 4, -4, 0, 0], [0, -5, 0, 0, -3, -2], [0, 3, 0, 0, -2, -1], [0, -1, 0, 0, 0, -1], [0, 1, 0, 0, 0, -3], [4, 0, 2, -5, 0, 0], [5, 0, -2, -3, 0, 0], [10, 0, -2, 3, 0, 0], [0, 2, 0, 0, -5, -5], [0, -5, 0, 0, 2, 7], [2, 0, 0, 5, 0, 0], [-2, 0, -4, 3, 0, 0], [0, -3, 0, 0, 4, 3], [0, -3, 0, 0, -2, -1], [14, 0, 0, 4, 0, 0], [0, 4, 0, 0, -2, 0], [-4, 0, 0, 0, 0, 0], [-9, 0, -2, -6, 0, 0], [10, 0, -2, 1, 0, 0], [0, -6, 0, 0, 1, 1], [0, -7, 0, 0, -6, -7], [-2, 0, -6, 1, 0, 0], [-4, 0, 4, 3, 0, 0], [0, -8, 0, 0, 1, 5], [3, 0, 2, 1, 0, 0], [0, 3, 0, 0, 0, 3], [0, -10, 0, 0, -1, -3], [0, 4, 0, 0, 4, -10], [14, 0, 4, 0, 0, 0], [0, -10, 0, 0, 2, -6], [0, -1, 0, 0, -1, 10], [12, 0, 2, -1, 0, 0], [0, 9, 0, 0, -1, 0], [0, 1, 0, 0, 2, -5], [-18, 0, -2, 1, 0, 0], [0, -12, 0, 0, -1, 13], [-8, 0, -4, -8, 0, 0], [0, 7, 0, 0, -6, -3], [0, 4, 0, 0, -7, -3], [-2, 0, 0, -5, 0, 0], [0, -7, 0, 0, -2, 1], [9, 0, 4, -5, 0, 0], [0, -7, 0, 0, 4, 5], [-15, 0, -2, -4, 0, 0], [-7, 0, -8, -2, 0, 0], [2, 0, -2, -3, 0, 0], [-15, 0, -6, 3, 0, 0], [-4, 0, 6, -1, 0, 0], [0, 0, 0, 0, 3, -13], [0, 0, -2, -1, 0, 0], [0, 4, 0, 0, -8, -4], [10, 0, -4, 1, 0, 0], [0, -4, 0, 0, -3, -1], [-5, 0, -6, 0, 0, 0], [0, 4, 0, 0, 0, -8], [0, -2, 0, 0, -8, -2], [10, 0, 4, -7, 0, 0], [0, -11, 0, 0, 0, -11], [4, 0, 8, -5, 0, 0], [-22, 0, -2, 0, 0, 0], [0, 9, 0, 0, 2, 5], [-11, 0, -4, 6, 0, 0], [7, 0, -2, 1, 0, 0], [0, 9, 0, 0, 6, -7], [7, 0, -4, 1, 0, 0], [0, -2, 0, 0, 6, -4], [0, 6, 0, 0, 7, -15], [0, -7, 0, 0, 4, 1], [6, 0, 10, 3, 0, 0], [-4, 0, -6, 2, 0, 0], [0, -5, 0, 0, -3, -2], [0, 3, 0, 0, -2, -13], [0, -13, 0, 0, -3, 2], [-10, 0, -2, 2, 0, 0], [-7, 0, 4, 8, 0, 0], [0, -9, 0, 0, -10, 1], [0, -6, 0, 0, -1, -1], [0, 14, 0, 0, -3, -11], [12, 0, 4, 8, 0, 0], [-16, 0, 10, 3, 0, 0], [25, 0, 0, -6, 0, 0], [0, -11, 0, 0, 8, 9], [0, 17, 0, 0, -4, -5], [0, -7, 0, 0, -4, 5], [8, 0, -2, -3, 0, 0], [-19, 0, 2, -2, 0, 0], [0, 8, 0, 0, -7, -9], [0, 0, 0, 0, 2, 4], [0, 1, 0, 0, 4, 7], [4, 0, -2, -3, 0, 0], [10, 0, 4, -4, 0, 0], [-3, 0, 8, 2, 0, 0], [24, 0, 2, 9, 0, 0], [0, 4, 0, 0, 8, 8], [0, 9, 0, 0, 5, 2], [24, 0, 2, 5, 0, 0], [0, 1, 0, 0, 4, -15], [4, 0, -2, 7, 0, 0], [0, 1, 0, 0, -4, -3], [26, 0, 2, -5, 0, 0], [-2, 0, -4, -5, 0, 0], [0, 21, 0, 0, 2, -19], [0, -3, 0, 0, -4, 11], [0, -5, 0, 0, -6, 15], [-23, 0, -4, 8, 0, 0], [-26, 0, 4, -2, 0, 0], [-18, 0, 2, -1, 0, 0], [0, -5, 0, 0, -10, -9], [0, 6, 0, 0, 6, 6], [1, 0, 0, 4, 0, 0], [-22, 0, -6, -3, 0, 0], [0, -11, 0, 0, -5, 12], [0, 7, 0, 0, 7, -20], [10, 0, 12, 8, 0, 0], [0, 10, 0, 0, 6, -6], [0, -12, 0, 0, -9, 23], [-3, 0, -12, -2, 0, 0], [0, 6, 0, 0, -8, -8], [0, -5, 0, 0, 4, -5], [0, 13, 0, 0, 2, -15], [24, 0, 6, -2, 0, 0], [-6, 0, -8, -5, 0, 0], [13, 0, -2, -2, 0, 0], [0, -13, 0, 0, -7, 2], [14, 0, -10, 4, 0, 0], [0, -1, 0, 0, -12, 5], [0, 13, 0, 0, 2, 9], [0, -14, 0, 0, -8, 12], [42, 0, 6, -3, 0, 0], [0, 14, 0, 0, 9, 3], [0, 14, 0, 0, 2, -4], [-18, 0, -8, -9, 0, 0], [0, -12, 0, 0, 3, 7], [-14, 0, -2, -2, 0, 0], [0, -7, 0, 0, 3, -2], [-22, 0, 0, 8, 0, 0], [-5, 0, -4, 8, 0, 0], [14, 0, -10, -5, 0, 0], [0, 18, 0, 0, -9, -13], [6, 0, 0, 10, 0, 0], [-7, 0, -4, 4, 0, 0], [-18, 0, -4, 5, 0, 0], [-17, 0, 10, 3, 0, 0], [0, 17, 0, 0, 0, 5], [-42, 0, 2, 3, 0, 0], [0, -8, 0, 0, -10, 6], [8, 0, -8, 4, 0, 0], [0, 1, 0, 0, 5, 8], [0, 2, 0, 0, 0, -14], [0, -1, 0, 0, -2, -13], [27, 0, -2, 6, 0, 0], [0, 2, 0, 0, -6, -6], [0, -2, 0, 0, -8, 8], [-19, 0, 0, -6, 0, 0], [-4, 0, -14, -1, 0, 0], [0, -4, 0, 0, -9, -1], [0, -21, 0, 0, -2, 9], [0, 0, 10, 0, 0, 0], [14, 0, -4, 7, 0, 0], [0, 17, 0, 0, -4, -15], [0, 13, 0, 0, -8, -11], [-1, 0, 4, 5, 0, 0], [0, 12, 0, 0, 15, -5], [0, 3, 0, 0, -3, 8], [0, 20, 0, 0, -4, -18], [17, 0, -2, 6, 0, 0], [-14, 0, 4, -9, 0, 0], [0, -16, 0, 0, -3, 3], [-3, 0, 10, -3, 0, 0], [10, 0, -12, -5, 0, 0], [0, 0, 0, 0, -1, -19], [-28, 0, 2, 0, 0, 0], [0, -1, 0, 0, -10, -17], [-13, 0, 0, -6, 0, 0], [-4, 0, -10, 7, 0, 0], [0, 18, 0, 0, -1, 19], [10, 0, -2, 12, 0, 0], [0, 29, 0, 0, -8, -13], [0, -11, 0, 0, -4, 7], [-10, 0, -8, 5, 0, 0], [7, 0, -10, 5, 0, 0], [0, -18, 0, 0, -4, -12], [39, 0, -6, 4, 0, 0], [0, 13, 0, 0, 0, -19], [0, -12, 0, 0, -2, 8], [-1, 0, 6, 2, 0, 0], [2, 0, -8, -6, 0, 0], [47, 0, 0, -3, 0, 0], [0, 7, 0, 0, 4, 3], [0, -1, 0, 0, 14, 3], [21, 0, -2, 3, 0, 0], [0, -20, 0, 0, -13, 23], [36, 0, 4, -5, 0, 0], [0, 3, 0, 0, 2, 1], [20, 0, 6, 4, 0, 0], [0, -14, 0, 0, 9, -5], [16, 0, -16, -5, 0, 0], [14, 0, 0, 13, 0, 0], [25, 0, -8, 3, 0, 0], [0, 0, 0, 0, 4, -14], [0, 8, 0, 0, -4, -10], [22, 0, 8, -3, 0, 0], [0, 8, 0, 0, 1, -23], [-22, 0, -8, -17, 0, 0], [28, 0, -6, 3, 0, 0], [0, 1, 0, 0, -14, -9], [10, 0, 0, 1, 0, 0], [0, -9, 0, 0, -2, -5], [13, 0, 2, -2, 0, 0], [0, 24, 0, 0, 3, 7], [24, 0, -4, -8, 0, 0], [0, 17, 0, 0, 2, -13], [-4, 0, 0, -13, 0, 0], [-12, 0, -6, -3, 0, 0], [0, -3, 0, 0, 8, -9], [0, 7, 0, 0, -10, -17], [-6, 0, 14, -9, 0, 0], [0, 10, 0, 0, 2, -2], [3, 0, 2, -16, 0, 0], [0, 16, 0, 0, -6, 16], [32, 0, 0, -1, 0, 0], [6, 0, 12, 5, 0, 0], [0, 17, 0, 0, 0, 13], [0, -26, 0, 0, 8, -2], [0, 8, 0, 0, 1, -27], [0, -2, 0, 0, -10, -14], [0, 19, 0, 0, -2, 15], [17, 0, 18, -1, 0, 0], [0, 10, 0, 0, -5, 1], [0, 4, 0, 0, 17, 9], [30, 0, 12, -5, 0, 0], [-42, 0, -10, 1, 0, 0], [25, 0, -10, -5, 0, 0], [0, -9, 0, 0, 4, 17], [0, 6, 0, 0, -11, 5], [-3, 0, -12, -11, 0, 0], [0, -6, 0, 0, 10, -22], [0, 18, 0, 0, 5, -7], [-10, 0, -8, 5, 0, 0], [0, 13, 0, 0, 10, -3], [0, 23, 0, 0, -2, 1], [0, 3, 0, 0, 12, 11], [-15, 0, -2, -9, 0, 0], [11, 0, -2, 14, 0, 0], [-6, 0, 6, -3, 0, 0], [0, -3, 0, 0, -2, 1], [34, 0, 12, -7, 0, 0], [0, -22, 0, 0, -8, 18], [31, 0, -12, 2, 0, 0], [0, 6, 0, 0, 10, -18], [2, 0, -12, 6, 0, 0], [0, -21, 0, 0, 1, 2], [0, 17, 0, 0, -5, -14], [-20, 0, -10, 13, 0, 0], [15, 0, 0, 8, 0, 0], [-10, 0, -4, -17, 0, 0], [0, 21, 0, 0, 0, 25], [0, 20, 0, 0, -11, -1], [30, 0, 10, -11, 0, 0], [0, -29, 0, 0, 0, 27], [-11, 0, -18, 7, 0, 0], [2, 0, 4, 8, 0, 0], [0, 24, 0, 0, 9, -9], [48, 0, -4, -5, 0, 0], [0, -15, 0, 0, 16, 19], [0, 24, 0, 0, 11, -15], [0, -29, 0, 0, -1, 6], [20, 0, 16, -3, 0, 0], [0, -22, 0, 0, 10, 6], [-2, 0, -14, -7, 0, 0], [0, -16, 0, 0, -11, -17], [0, 10, 0, 0, -12, 6], [23, 0, 8, -5, 0, 0], [20, 0, -10, 7, 0, 0], [0, -11, 0, 0, 11, 14], [0, 5, 0, 0, 12, 25], [50, 0, 8, -1, 0, 0], [11, 0, -16, -13, 0, 0], [0, 17, 0, 0, -2, 13], [0, -13, 0, 0, 10, -11], [-11, 0, -10, 12, 0, 0], [-22, 0, 14, 11, 0, 0], [18, 0, 0, 8, 0, 0], [0, 9, 0, 0, 14, 1], [-9, 0, -20, 8, 0, 0], [-6, 0, 10, -16, 0, 0], [0, -22, 0, 0, 10, 14], [11, 0, -4, 4, 0, 0], [0, -17, 0, 0, 4, 3], [0, 16, 0, 0, 12, -28], [21, 0, 4, 8, 0, 0], [66, 0, 4, 2, 0, 0], [0, 27, 0, 0, -6, 3], [0, -7, 0, 0, 10, 17], [0, 14, 0, 0, 15, 1], [-23, 0, -12, 18, 0, 0], [0, 21, 0, 0, 3, 14], [38, 0, 6, -1, 0, 0], [0, -31, 0, 0, 6, 15], [28, 0, -10, -11, 0, 0], [0, 10, 0, 0, 10, 20], [3, 0, -12, -18, 0, 0], [0, 11, 0, 0, -12, 23], [-41, 0, -12, 12, 0, 0], [0, 18, 0, 0, 6, -30], [0, -8, 0, 0, 6, -32], [0, -18, 0, 0, -3, -3], [-33, 0, 2, 9, 0, 0], [0, 0, 8, 13, 0, 0], [0, -1, 0, 0, -6, 11], [-24, 0, -20, -4, 0, 0], [-5, 0, -6, -7, 0, 0], [0, 27, 0, 0, 4, -29], [14, 0, -8, 11, 0, 0], [0, -41, 0, 0, 8, 11], [-36, 0, 6, -12, 0, 0], [0, -19, 0, 0, -16, 13], [-59, 0, 0, 2, 0, 0], [0, -23, 0, 0, -2, 11], [3, 0, 4, 16, 0, 0], [0, 15, 0, 0, -3, -16], [32, 0, 2, 3, 0, 0], [-60, 0, 0, -1, 0, 0], [0, 9, 0, 0, -11, 0], [0, -6, 0, 0, 14, 20], [0, -30, 0, 0, 7, -9], [3, 0, -8, 20, 0, 0], [0, -29, 0, 0, 8, 21], [-4, 0, 16, -3, 0, 0], [0, -29, 0, 0, -4, 7], [0, 1, 0, 0, 8, -7], [0, 3, 0, 0, -16, -25], [0, -29, 0, 0, -18, 23], [-3, 0, 4, 13, 0, 0], [-10, 0, -24, -7, 0, 0], [2, 0, 10, -11, 0, 0], [0, 14, 0, 0, 16, 24], [17, 0, 6, 21, 0, 0], [18, 0, 6, -7, 0, 0], [0, 14, 0, 0, 15, -31], [-22, 0, -12, 6, 0, 0], [24, 0, 12, 13, 0, 0], [0, 1, 0, 0, 14, -23], [7, 0, 24, -10, 0, 0], [0, 32, 0, 0, -3, -17], [-46, 0, -8, 4, 0, 0], [0, 16, 0, 0, -1, -3], [0, 16, 0, 0, 8, -16], [0, -16, 0, 0, -6, 20], [-44, 0, 6, -3, 0, 0], [0, 17, 0, 0, 2, -9], [0, 0, 8, -9, 0, 0], [0, -20, 0, 0, -6, -12], [0, 24, 0, 0, -6, -10], [0, -27, 0, 0, 14, 15], [-11, 0, 14, -8, 0, 0], [0, -14, 0, 0, -3, 31], [-24, 0, 4, 2, 0, 0], [0, 13, 0, 0, -8, 5], [28, 0, -2, 9, 0, 0], [0, 11, 0, 0, 14, -13], [24, 0, 4, -17, 0, 0], [58, 0, 10, 8, 0, 0], [-20, 0, -12, 2, 0, 0], [9, 0, -10, -10, 0, 0], [-6, 0, -4, 15, 0, 0], [0, 9, 0, 0, 12, 25], [0, 7, 0, 0, 16, 11], [0, 15, 0, 0, -7, 22], [39, 0, 14, -12, 0, 0], [10, 0, 18, 13, 0, 0], [0, -49, 0, 0, 8, 27], [17, 0, 4, 22, 0, 0], [0, -18, 0, 0, -18, 10], [20, 0, 14, -1, 0, 0], [0, 31, 0, 0, 9, -24], [0, -24, 0, 0, 3, 7], [0, -33, 0, 0, -14, 7], [-18, 0, 26, 5, 0, 0], [0, -10, 0, 0, 9, 11], [-35, 0, -16, -9, 0, 0], [-10, 0, -6, -17, 0, 0], [0, 6, 0, 0, -14, 20], [0, -9, 0, 0, 6, 23], [0, -1, 0, 0, 10, -17], [49, 0, 14, -12, 0, 0], [0, 7, 0, 0, 5, -34], [0, -5, 0, 0, -18, 7], [14, 0, 20, -10, 0, 0], [0, -19, 0, 0, 8, 5], [0, -2, 0, 0, -13, 11], [0, 24, 0, 0, 12, -4], [17, 0, 10, 7, 0, 0], [26, 0, 12, -5, 0, 0], [42, 0, 2, -17, 0, 0]];
    aps := ConvertToHeckeField(raw_aps);
    chi := MakeCharacter_4225_a_Hecke(Universe(aps));
    return ExtendMultiplicatively(weight, aps, chi);
end function;


// To make the newform (type ModFrm), type "MakeNewformModFrm_4225_2_a_bq();".
// 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_4225_2_a_bq(:prec:=6)
    chi := MakeCharacter_4225_a();
    f_vec := qexpCoeffs();
    Kf := Universe(f_vec);
    // SetVerbose("ModularForms", true);
    // SetVerbose("ModularSymbols", true);
    S := CuspidalSubspace(ModularForms(chi, 2));
    S := BaseChange(S, Kf);
    maxprec := NextPrime(2999) - 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_4225_2_a_bq();".
// 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_4225_2_a_bq( : sign := -1)
    R<x> := PolynomialRing(Rationals());
    chi := MakeCharacter_4225_a();
    // SetVerbose("ModularSymbols", true);
    Snew := NewSubspace(CuspidalSubspace(ModularSymbols(chi,2,sign)));
    Vf := Kernel([<2,R![-1, 0, 10, 0, -8, 0, 1]>,<3,R![-4, 0, 35, 0, -12, 0, 1]>,<7,R![-400, 0, 179, 0, -24, 0, 1]>,<11,R![8, -13, 0, 1]>],Snew);
    return Vf;
end function;