
// Make newform 6027.2.a.y in Magma, downloaded from the LMFDB on 20 April 2024.
// To make the character of type GrpDrchElt, type "MakeCharacter_6027_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_6027_2_a_y();".
// 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_6027_2_a_y();".
// 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 := [4, -10, -20, 14, 16, -6, -3, 1];
        Kf := NumberField(Polynomial([elt : elt in poly]));
        AssignNames(~Kf, ["nu"]);
    end if;
    Rf_num := [[1, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0, 0], [-3, -1, 1, 0, 0, 0, 0], [3, -3, -2, 1, 0, 0, 0], [0, -8, 4, 12, -4, -3, 1], [-4, -16, 12, 16, -6, -3, 1], [-6, 14, 14, -18, -2, 5, -1]];
    Rf_basisdens := [1, 1, 1, 1, 2, 2, 2];
    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_6027_a();"
function MakeCharacter_6027_a()
    N := 6027;
    order := 1;
    char_gens := [4019, 493, 2794];
    v := [1, 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_6027_a_Hecke(Kf)
    return MakeCharacter_6027_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 := [[1, -1, 0, 0, 0, 0, 0], [-1, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, -1, 0], [0, 0, 0, 0, 0, 0, 0], [2, 0, 0, 0, 1, -1, 0], [1, 0, 0, 0, 0, 0, -1], [0, -2, 0, -1, 1, 0, 1], [1, -1, 2, 0, 1, 0, 1], [0, 1, 0, 1, -1, -1, 1], [1, 0, -1, -1, 1, -1, 1], [0, 0, -1, 1, -1, -1, 0], [2, 0, 2, -2, 1, 0, 0], [-1, 0, 0, 0, 0, 0, 0], [0, 0, 0, 1, 1, 0, 1], [-2, 0, 1, 2, 1, -1, 1], [3, 0, 0, 0, -2, -2, 1], [1, -3, 1, 0, 1, -1, 0], [1, -1, 2, 0, -2, 1, 1], [-1, 1, 2, 3, -1, 2, -2], [1, 1, 0, 0, 2, 1, 1], [2, -2, -1, 1, 1, -1, 0], [-2, 2, -1, 2, 0, -2, 1], [0, 0, 0, 2, 2, -2, 2], [-7, 1, -1, 1, -3, 2, -1], [6, -1, 0, -4, 1, 0, 2], [0, -4, -2, 2, -1, 1, 0], [3, -2, 2, 1, 3, 2, -2], [1, 0, 2, 3, -4, 1, 0], [-2, 0, -2, 3, -2, 1, -1], [-3, 1, -5, 1, 1, 0, -1], [-1, -3, 3, 1, 1, 0, 3], [-6, -4, 0, -1, 0, -1, 3], [8, -3, 4, 0, 0, -3, 2], [1, 2, 1, 0, 0, 5, -2], [1, -1, 0, 2, 3, -2, -1], [5, -5, 3, -1, -1, 2, -1], [7, 1, -2, 0, 1, 2, -3], [1, 3, -1, -4, 4, 0, 0], [-8, 8, -3, 5, -4, -1, -2], [-4, 0, -2, -1, 4, 0, -1], [4, -6, -3, 1, 1, -1, -2], [3, 1, -4, 2, 3, 0, 1], [1, -3, -4, -4, 1, -2, -1], [1, -5, -1, -6, 5, -1, 2], [4, -6, 0, 2, -2, -2, 0], [8, 0, -1, -3, -2, -4, 2], [10, -4, 5, 2, -4, 2, -1], [9, -2, 5, -4, 4, 1, 2], [8, -4, -1, -4, 1, -5, 3], [5, 0, 1, -5, 6, -4, 1], [13, -5, 2, 2, 3, -4, 1], [3, -7, 1, -1, 1, 2, 3], [5, -1, 3, -1, 0, 5, 3], [-11, 5, -5, -5, -1, 0, -1], [-5, 11, -1, 3, -2, -5, -3], [-2, 0, -2, 0, 1, 1, -2], [5, -1, -5, -2, 1, -2, 0], [-5, 4, -1, 4, -1, -2, -4], [-5, -1, -3, 0, -2, 7, 0], [-3, 4, 2, 4, -5, 5, -5], [-1, 3, -4, 2, 0, -1, 1], [4, 4, 0, -3, 1, -2, -1], [-4, 3, -3, 6, -6, 4, -1], [-2, 0, -3, 0, -4, -2, -3], [4, 3, -1, -1, 3, -4, 0], [5, 0, -4, -2, -1, -3, -1], [0, 6, -1, -3, 0, 1, 0], [-7, 3, 3, 9, 0, 0, -1], [0, 4, -1, -3, 1, -3, 4], [-2, 0, -3, 1, -3, 1, 2], [-1, 7, -5, 3, -1, -2, -1], [-4, -3, -1, 4, -1, 5, 1], [14, -1, 5, -2, 4, 8, -3], [-5, 3, -11, -3, 2, 0, -1], [15, 1, 1, 0, 5, -1, -2], [-1, -3, -2, -9, 0, -1, 0], [-5, -3, -2, 0, 5, 0, 1], [-5, 11, 2, 2, -3, 0, -1], [-1, 5, -9, -3, 3, -4, 1], [4, 6, 2, 4, -5, -5, -2], [-9, 1, 1, 2, 1, 1, -4], [-3, -3, -7, 0, -1, 1, -2], [-1, 1, 6, 0, 5, 2, -1], [15, -9, 1, -3, 0, -1, 1], [-7, 5, 0, -2, 3, 0, 1], [-11, -7, -2, 4, 1, 4, 1], [2, 0, -1, -11, 2, 2, -2], [4, -8, 4, -2, -2, 4, 4], [-3, -3, 1, 2, 1, 0, -2], [-3, 1, -6, 3, -3, 6, 0], [6, -2, 2, -7, 8, -1, 3], [2, -4, 8, -2, 3, -1, 2], [6, 8, 2, -6, 5, -5, 0], [16, 4, 5, -7, 2, -2, 8], [15, -5, 7, -5, -5, 4, 1], [-11, 9, 0, 8, -2, -2, -5], [1, 1, 3, 6, -2, 6, 0], [0, -2, -4, 0, -3, -1, 4], [-3, -11, -2, -2, 1, -2, 7], [9, 7, 1, -3, 3, 5, -1], [19, -5, 2, 2, -1, 3, -1], [-14, 10, -5, 5, -9, 1, -4], [-6, 0, 7, 9, 1, -2, 0], [4, 0, -5, 7, 2, -2, -2], [13, 3, 3, -1, -5, -6, 3], [21, -1, 2, -4, 1, 4, -1], [3, -1, -3, -1, 0, -1, -3], [3, -1, 5, -1, -4, 3, 3], [-12, 11, -4, 11, -3, 1, -5], [-4, 1, -4, -4, -1, -6, 4], [3, 1, 2, -4, 5, 2, 3], [-5, 7, -3, 6, 3, -4, -4], [-6, -2, 0, 0, 2, 8, -4], [1, 10, 0, -1, 3, 4, -4], [-17, -1, -11, -1, 4, -1, -3], [-8, 2, 11, 3, -9, 1, 4], [-12, 8, -5, -5, -4, -2, 0], [12, -4, 2, -1, 4, -5, -1], [1, -5, 0, 2, -8, 5, -7], [3, 3, 7, 1, 3, 6, -1], [15, 3, 9, -3, -1, 2, 7], [-5, -7, 3, -8, 1, -1, 10], [5, 3, -5, -1, 7, 4, 1], [-7, -1, -7, -1, -1, -6, 1], [-1, 5, 5, 3, 5, 10, -5], [-15, 1, 3, 1, 5, -8, -1], [-1, -5, -1, 5, -1, 0, 1], [-12, -2, 2, 8, 1, 7, 0], [6, 6, -2, 2, 0, -2, -6], [9, -15, 5, 5, 2, 5, 3], [-2, 4, 2, 7, -1, 4, 3], [5, -1, 4, 4, 1, 2, -1], [1, 7, 6, -1, 5, 0, -4], [-19, 7, 11, 3, -1, 0, 1], [13, -5, 3, 3, 5, -3, -1], [3, -5, -5, 3, 0, -7, -3], [12, 2, 6, 0, -5, 5, -2], [-1, 0, 3, 2, -7, 0, -6], [10, 2, 10, 0, -6, -8, 2], [12, 7, -1, -9, 9, -2, 0], [-16, 5, 7, 0, 8, 0, -1], [-26, -2, -5, -7, 8, 2, 2], [-2, 12, 0, -12, 6, 0, 2], [-9, 7, -3, 7, 0, -1, 1], [10, 0, 0, -4, -1, 13, 2], [-7, -7, 6, -2, 5, 1, 9], [3, -1, -1, 9, -9, 6, 1], [11, -9, -3, -1, -3, -7, -1], [0, 1, -2, -3, -6, -2, -3], [-1, -10, 8, -9, 2, 1, 4], [-13, -1, 1, -3, -6, 1, 1], [11, -1, 1, 3, 9, -1, -5], [2, 12, -9, -5, 6, -3, -4], [0, 4, -11, -5, -1, 4, 2], [-8, -4, -6, 6, 0, -2, -4], [-6, 18, 3, -9, 2, 0, -2], [-3, 7, 4, 4, -1, 9, -7], [10, 4, 6, 1, -1, -2, -1], [5, 5, -2, -4, 7, -2, 3], [4, -14, -4, 1, 2, 8, 7], [-8, -5, 3, -10, 3, -1, -1], [1, 5, 6, 10, -1, 6, 1], [11, -13, -6, -6, 5, 7, -5], [-4, -8, 9, 12, 1, 7, 5], [-2, 6, -5, 1, -5, 9, -8], [-4, 4, -6, -7, 6, 1, -3], [-3, 1, -12, -2, 9, -5, 3], [31, -14, 3, -7, 6, 4, 3], [-8, -6, -4, 5, -1, -11, -3], [8, 6, -12, -8, -2, 2, -6], [16, 0, 2, 0, 4, -6, -2], [14, 2, 1, -13, 10, -6, 2], [-5, -1, 3, -5, 3, 8, -3], [5, 11, -3, -9, 2, 0, -1], [-15, -1, 5, 5, -1, 4, 3], [1, 1, 11, 4, -6, -8, 6], [23, -7, 2, -6, 11, 1, 3], [8, -2, -1, -5, -6, 14, 2], [13, -13, -11, -3, 9, 0, -1], [20, -9, -9, -7, -3, -2, 2], [18, -12, 10, -4, 5, -7, 2], [-22, 12, -12, 7, 2, -3, -5], [14, -10, 4, -8, 0, -8, 8], [0, 8, 6, 9, 0, 8, -7], [-6, -7, -3, 0, 5, 5, -3], [6, 2, 6, -6, -2, 10, -8], [8, 0, -2, -6, -4, -2, 2], [4, 5, -17, -6, 3, 3, -9], [-6, 0, -8, -5, -2, 17, -3], [16, -6, 0, -6, 1, 7, 0], [12, -6, -7, -1, 7, 9, 2], [2, 0, -1, 1, -8, 10, 0], [-5, 3, 5, -8, 7, 5, -2], [-1, 15, -9, -1, -5, -6, 3], [-16, 7, 1, -6, 1, 7, 5], [2, 12, 2, -4, 2, -8, -2], [6, 0, -6, -13, 4, -1, -5], [7, -5, -1, 0, -3, 3, 2], [-8, -4, -2, 1, 4, 1, -9], [-7, 7, 7, 9, 4, 5, -5], [27, -15, -5, -3, -1, -2, 1], [2, -5, 3, 6, -2, -14, -1], [-14, 10, -1, 15, -6, 0, -8], [9, -20, 9, 13, -2, 2, -1], [-12, -8, 6, 4, -9, 5, -4], [0, 2, 8, 14, -15, 5, -2], [-2, -15, 2, -1, 7, 7, -5], [7, -11, 4, 8, -8, 7, -5], [8, -2, -3, -3, -8, 14, -6], [9, -5, 2, -6, -4, -5, 5], [-24, 8, -10, -3, -2, 9, -1], [10, -4, 6, -12, 1, -3, 4], [18, -6, 10, 3, -6, 11, -3], [-5, -9, 5, -3, -1, -6, 5], [-9, -13, 8, 1, 0, -9, 4], [-8, 8, 6, 0, 7, 7, 6], [34, -6, 13, -10, 10, -2, 11], [-8, 2, -6, 2, 4, -2, 2], [-27, 9, -23, -1, 0, -5, -5], [27, 3, -4, -6, 15, -12, 1], [8, 0, 4, 13, -4, -3, 5], [-20, 21, 1, 4, -2, 4, -7], [7, 8, -6, 4, 7, -7, 5], [-10, -2, -3, 1, -4, -15, 8], [3, 1, 9, -11, 3, 4, 9], [-10, -14, -2, 2, 2, 10, -4], [-8, -2, 4, -6, 2, -1, 6], [-13, -6, 5, 6, -10, -7, 6], [9, 9, 5, -3, -3, -2, 11], [-26, 3, -12, -1, 5, -7, 5], [22, -12, 18, -3, 8, 0, 7], [-24, -2, 1, 3, 6, -8, -2], [34, -12, 6, -3, 13, 2, 9], [32, -10, 6, -8, 8, -12, 12], [-9, -9, -7, 5, -3, -4, 1], [-5, -7, -5, -9, 1, -6, 9], [10, -1, -10, -8, 3, 4, 4], [15, -8, 12, -14, 2, 2, 3], [13, 0, 7, 0, -2, 3, -4], [-1, 7, -15, -5, 12, -9, -3], [-11, 3, -3, 13, -13, -6, -1], [-22, 10, 4, 2, -2, 4, -8], [-7, 5, 7, 11, -9, 8, 3], [29, -9, -5, -5, 12, -14, 13], [-17, -3, -1, -6, 3, -10, 2], [-19, 19, -13, 1, -3, 6, -7], [9, 12, 1, 2, 6, -13, -4], [3, 3, -2, 4, 2, -12, -5], [-2, 2, 0, -2, -1, 13, -6], [-6, -9, 7, 0, 7, 9, -9], [9, -11, 13, 0, -8, 11, -6], [11, -13, 3, -2, 5, 8, 6], [-16, 7, 5, 4, -1, -13, 7], [-19, 5, 0, -4, -6, 7, -9], [-7, -5, -11, -5, 7, 14, -5], [0, 9, 0, 11, -11, 1, -13], [8, -12, 10, 9, 0, 13, 3], [28, -10, 2, 0, -4, -8, 2], [-7, -7, 3, 14, -6, 10, 0], [30, -11, -8, -4, -5, 6, -6], [-31, 15, 5, 0, 4, -4, 2], [1, 11, 3, 9, -2, 5, 3], [-10, 19, -13, -1, 13, -8, 2], [0, -17, 4, 6, 7, 10, 2], [4, -12, -10, -4, 0, 11, 6], [-3, -16, 2, 1, 5, 12, 4], [-2, 4, 1, -3, 11, -5, 10], [-29, 11, -1, 0, -9, 6, -8], [49, -21, 15, -9, 19, 6, 11], [13, 6, 3, 3, -1, 1, -3], [-6, -1, 0, 12, -9, 0, 2], [31, -11, 1, -17, 8, -5, 9], [34, -20, -5, -11, 9, -9, 4], [15, -13, -9, -10, 6, -10, 0], [19, -15, 26, 4, 1, 2, 5], [49, -1, -2, 6, 3, 0, -1], [-5, 13, -4, -16, 8, 1, 3], [19, -15, 17, -7, 11, 0, 11], [9, -7, -5, -4, 13, 3, 4], [-20, -10, 3, -3, -3, -4, -6], [-19, 3, -1, 9, -16, -7, -1], [7, -19, -4, 12, -3, -9, 3], [24, 0, 24, 5, -6, 7, 3], [-14, 0, 15, 7, -12, 8, 4], [9, -3, -3, -15, 13, -12, 7], [-17, -3, 20, 8, 4, 5, -5], [-4, 12, -10, -7, -8, -9, -5], [9, -3, 2, 0, 5, 12, 3], [30, -16, 10, -4, 12, 8, 8], [-10, 4, -14, -13, 3, -4, -3], [11, -6, -9, 3, -11, 13, -1], [25, -9, 3, -3, 13, 6, 5], [-3, -13, 6, 2, -10, -3, 3], [-3, 3, -5, -18, 7, -1, 4], [-17, 5, -7, 19, -3, -2, -3], [2, -2, 4, -7, -7, 0, -3], [9, 1, -1, -3, -3, -14, 1], [-10, 14, -12, -3, 6, -2, 1], [-45, 5, 0, 12, -7, 11, -9], [-18, -18, 1, 3, -6, 18, 0], [3, 13, -1, 15, -7, 4, -13], [25, 12, -7, -5, 6, -8, -7], [8, -26, -2, -4, 7, 1, 8], [12, 14, -15, -7, 1, -5, -6], [7, 21, -5, -9, 2, -13, 7], [-2, -16, -14, 4, 0, -2, -14], [-1, -2, 3, 8, 0, -13, 6], [18, -8, 0, -18, 11, -1, 0], [9, -9, 16, 8, -5, -4, -1], [-2, 2, 6, -1, -6, 11, -5], [9, 1, 2, 0, 8, 10, -11], [-11, -6, -15, 7, 0, -2, 1], [-4, 4, -3, -1, 6, 0, -8], [-27, 13, 3, 4, -4, 0, -4], [-13, -6, 1, -4, 10, -7, 16], [-31, 5, 2, 0, -7, 12, -5], [3, 17, 7, 13, -13, -6, 7], [-7, -6, 0, 7, 0, -9, 2], [18, -11, -1, 7, -5, -12, 2], [-6, 14, 1, 15, -7, 3, 0], [-33, 0, -5, 2, -2, 7, -4], [22, -6, 18, 20, -10, 5, 0], [15, -9, 5, -9, -1, -12, 9], [4, 2, -2, 8, 10, -4, 10], [13, -9, -8, 10, 5, 2, 7], [7, 8, 0, 0, 2, 10, -11], [29, -5, 2, 4, 3, 5, -1], [23, -15, -3, 7, -11, 2, -1], [-9, 3, 15, 13, -10, -1, 1], [9, 5, 4, 6, -11, 6, -5], [25, 1, 7, 8, -5, 9, 4], [-8, 12, 3, -3, 16, 14, -4], [10, -11, 7, -10, 15, -13, 13], [-20, 12, -7, -8, -8, 8, -9], [1, -11, 1, 4, -4, 8, -14], [-18, 24, -21, 14, -13, 7, -17], [50, -6, 2, -9, 16, -17, 11], [-14, -4, -6, 4, 0, 3, 8], [3, 4, 11, 5, 0, -10, -1], [-42, 6, -5, 5, -9, 5, -2], [16, -10, -4, -5, -8, 13, -9], [-7, 13, -18, -18, -1, 0, 1], [0, 14, -26, 6, 2, 6, -2], [4, 2, 2, 2, -8, 8, -8], [-13, 3, -17, 7, -11, 4, -1], [-1, -2, 1, 8, 0, -5, -16], [1, -5, -8, -18, 7, -2, -1], [14, -28, 8, 10, 3, 1, -6], [-1, -11, 2, -7, 1, 16, 12], [7, -3, -5, -5, 7, -18, 15], [20, -16, 17, 7, 4, -10, 6], [32, -24, 2, -14, 7, 2, 10], [21, -2, -4, -16, 11, 1, -3], [10, 8, -7, 13, -3, -3, 0], [44, -18, 4, -1, 16, -5, 3], [-13, -19, 3, 20, -15, 7, 2], [12, 0, 4, -6, 2, 12, 2], [-6, 20, -2, 2, 0, -6, 6], [-1, 7, 13, 15, -5, 4, -7], [-37, -8, 1, -8, -2, -7, 0], [18, 20, -6, -9, -1, -9, 15], [-13, 3, -1, -5, 7, -12, 11], [-32, 32, 1, -11, 1, 3, 2], [5, 2, 10, 17, -16, 9, -10], [-1, -1, 8, 14, 1, -16, 15], [-6, 8, -6, -10, 2, 12, -4], [12, 8, 2, -5, -4, 9, -3], [5, 17, 5, -8, 2, 10, -2], [23, 9, 11, -12, 2, -7, -2], [0, 22, 5, -9, 6, -8, -2], [6, -12, 4, -10, 8, 0, 4], [-37, -3, -12, -4, 5, -12, -3], [-6, 28, -13, -9, -1, -1, 6], [-16, 13, -8, -1, -1, 23, -9], [15, 13, -7, -5, 5, 10, -3], [-5, 1, -7, -6, 5, -19, 8], [-26, -5, 8, -3, 3, -15, 3], [8, 10, 0, 2, -10, 2, 4], [13, -3, -7, -4, 10, -16, -4], [-27, -12, -4, -2, 2, 6, -11], [-1, 5, -9, -8, 14, -4, 0], [-25, 33, -21, -3, 7, -10, 1], [-32, 0, 2, 11, -3, -16, 5], [36, 0, 2, 0, 2, -6, 12], [-45, 23, -4, 8, -19, 8, -15], [62, -2, 2, -7, 8, 7, -1], [-10, -8, 11, 4, 8, -2, 3], [16, -13, -9, 9, -5, 0, -6], [-45, 31, -1, 13, -14, -1, -7], [19, 1, 8, 0, 13, 13, -5], [-35, 11, 3, 10, -5, 13, -2], [9, -31, 3, -6, 0, -6, 12], [-24, -24, 9, -5, 0, -6, 14], [-11, -2, -10, -5, 16, -7, 4], [27, -10, -6, -1, -4, 5, -10], [-27, 23, 9, -7, 5, -4, -3], [4, -18, 20, -4, -12, -6, 4], [-11, 9, -5, 3, 5, 15, -9], [24, 8, 6, 17, -13, -2, 7], [-8, 22, 5, -19, 6, 10, 6], [10, 2, 6, 6, 3, -5, 6], [25, -20, -1, -3, -2, -12, 1], [-38, 14, -2, -16, -7, 5, 6], [14, 4, -4, 10, -12, 0, -10], [-26, 10, -12, -4, 12, 17, -2], [13, -17, -15, -5, 1, 0, 1], [5, -5, 13, 13, -12, -3, 7], [-23, 29, -20, 20, 0, 3, -13], [-2, 2, -20, -10, 4, 8, -8], [-42, 20, -10, 3, -16, 9, -7], [5, -29, -2, 0, 4, 15, -7], [32, -18, 0, -4, -4, 16, 2], [11, 1, -2, -22, 21, 6, -7], [9, -17, -20, -5, -1, -10, 10], [-1, -17, 1, -1, 3, 12, -3], [-21, 5, 3, -19, -5, 7, 3], [-9, 4, -3, 4, -12, -9, 0], [17, -21, 16, -4, -3, 10, 7], [-5, -9, -21, -2, 10, -2, -6], [9, 9, -7, 4, 3, 1, 4], [28, -22, 4, 4, 4, 0, 2], [-32, 30, 3, 5, 2, -12, 0], [-19, 4, 4, 17, 4, -7, -12], [7, -13, -4, -25, 12, -3, 6], [-7, -21, 0, 4, -6, 5, -5], [-15, 5, -3, -4, 11, -8, 8], [18, 10, -5, -7, 9, -7, 2], [-39, -4, -5, 9, -19, 3, 3], [-19, 11, -3, 9, -7, -12, -1], [-33, 17, -6, 7, 4, -15, 0]];
    aps := ConvertToHeckeField(raw_aps);
    chi := MakeCharacter_6027_a_Hecke(Universe(aps));
    return ExtendMultiplicatively(weight, aps, chi);
end function;


// To make the newform (type ModFrm), type "MakeNewformModFrm_6027_2_a_y();".
// 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_6027_2_a_y(:prec:=7)
    chi := MakeCharacter_6027_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_6027_2_a_y();".
// 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_6027_2_a_y( : sign := -1)
    R<x> := PolynomialRing(Rationals());
    chi := MakeCharacter_6027_a();
    // SetVerbose("ModularSymbols", true);
    Snew := NewSubspace(CuspidalSubspace(ModularSymbols(chi,2,sign)));
    Vf := Kernel([<2,R![4, 15, -34, -7, 24, -3, -4, 1]>,<5,R![-4, -36, 57, 69, -18, -18, 1, 1]>,<13,R![-72, 294, -223, -83, 114, -14, -7, 1]>],Snew);
    return Vf;
end function;