
// Make newform 2646.2.t.a in Magma, downloaded from the LMFDB on 18 April 2024.
// To make the character of type GrpDrchElt, type "MakeCharacter_2646_t();"
// To make the character of type GrpDrchElt with Codomain the HeckeField, type "MakeCharacter_2646_t_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_2646_2_t_a();".
// 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_2646_2_t_a();".
// 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 := [6561, 0, -4374, 0, 729, 0, 486, 0, -288, 0, 54, 0, 9, 0, -6, 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], [-243, 0, 729, 0, 234, 0, 72, 0, -36, 0, 6, 0, -1, 0, -1, 0], [0, 2187, 0, 2916, 0, -1377, 0, 198, 0, 135, 0, -45, 0, 3, 0, 1], [0, 9477, 0, 324, 0, -216, 0, 396, 0, 0, 0, -18, 0, 9, 0, 2], [4131, 0, -972, 0, 396, 0, 180, 0, -36, 0, 6, 0, -1, 0, 2, 0], [-2187, 0, 1458, 0, -135, 0, -126, 0, 81, 0, -9, 0, -3, 0, 1, 0], [0, -13122, 0, 8019, 0, 1134, 0, -1044, 0, 540, 0, 36, 0, -24, 0, 7], [8748, 0, -4617, 0, 54, 0, 792, 0, -216, 0, 0, 0, 18, 0, -5, 0], [9477, 0, -972, 0, -648, 0, 576, 0, -108, 0, -18, 0, 21, 0, -2, 0], [729, 0, -2673, 0, 2862, 0, -612, 0, 0, 0, 126, 0, -21, 0, 1, 0], [0, -2187, 0, 8019, 0, -1458, 0, -558, 0, 378, 0, -18, 0, -15, 0, 7], [0, 0, 0, 513, 0, -108, 0, -18, 0, 36, 0, -6, 0, 0, 0, 1], [0, 1215, 0, -621, 0, -36, 0, 180, 0, -54, 0, 0, 0, 5, 0, -1], [0, -6561, 0, 2511, 0, 324, 0, -630, 0, 216, 0, 0, 0, -21, 0, 5], [8505, 0, -3321, 0, -180, 0, 594, 0, -180, 0, 12, 0, 13, 0, -3, 0], [0, -87480, 0, 37179, 0, 2106, 0, -6192, 0, 2052, 0, -36, 0, -138, 0, 35]];
    Rf_basisdens := [1, 1944, 4374, 5832, 1944, 1458, 17496, 5832, 5832, 5832, 8748, 972, 972, 2916, 972, 17496];
    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_2646_t();"
function MakeCharacter_2646_t()
    N := 2646;
    order := 6;
    char_gens := [785, 1081];
    v := [1, 5];
    // 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_2646_t_Hecke();"
function MakeCharacter_2646_t_Hecke(Kf)
    N := 2646;
    order := 6;
    char_gens := [785, 1081];
    char_values := [[0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0, -1, 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, -1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [2, -1, 0, 0, 0, 1, 0, 0, -2, -1, 0, 0, 0, 0, 1, 0], [0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0], [0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0], [0, 0, -1, 1, 0, 0, 1, 0, 0, 0, 0, -1, 0, 1, 0, -1], [-2, 0, 0, 0, -1, -2, 0, 1, 4, -1, 0, 0, 0, 0, 0, 0], [2, 0, 0, 0, 1, 1, 0, 1, 0, -1, 0, 0, 0, 0, 1, 0], [0, 0, -1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 1, 2, 0, 0], [2, -2, 0, 0, 1, 5, 0, -3, -2, 1, 0, 0, 0, 0, 1, 0], [0, 0, -1, -2, 0, 0, -2, 0, 0, 0, 2, 2, -1, -2, 0, 0], [1, -1, 0, 0, 1, 3, 0, -2, -1, 1, 0, 0, 0, 0, 0, 0], [0, 0, -2, 2, 0, 0, 2, 0, 0, 0, 1, -2, -2, -1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, -1, 0, 0, -2, 0, 0, 0, 1, -2, 1, 1, 0, -1], [0, 0, 2, 0, 0, 0, 0, 0, 0, 0, -1, -1, -2, -1, 0, -1], [-3, -1, 0, 0, 1, -9, 0, 4, 3, 1, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, -1, 1, 0, 1, -2, -1, 0, 0, 0, 0, 0, 0], [0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, -2, 1, 0, 0, -2], [-3, 2, 0, 0, -1, -5, 0, -3, 1, 2, 0, 0, 0, 0, -1, 0], [0, 0, -2, 3, 0, 0, -2, 0, 0, 0, 4, -2, 4, 2, 0, 3], [0, 0, 0, -2, 0, 0, 2, 0, 0, 0, -2, 2, -2, -2, 0, -2], [0, 0, -4, 2, 0, 0, -2, 0, 0, 0, 3, 2, -3, 1, 0, -2], [0, 0, -3, 3, 0, 0, -2, 0, 0, 0, 2, -1, 1, 3, 0, -1], [0, 0, 0, 4, 0, 0, 0, 0, 0, 0, -2, -4, -2, 0, 0, 4], [-7, 1, 0, 0, -1, -1, 0, 0, -5, 1, 0, 0, 0, 0, 0, 0], [-1, 1, 0, 0, 0, 6, 0, 6, 4, 1, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 1, 1, 0, -1, 1, -1, 0, 0, 0, 0, -1, 0], [0, 0, 0, 0, 1, 0, 0, 1, 0, -1, 0, 0, 0, 0, 0, 0], [0, 0, 3, 3, 0, 0, -4, 0, 0, 0, -2, 1, -1, -3, 0, 1], [-4, 3, 0, 0, -2, -1, 0, 2, 2, 1, 0, 0, 0, 0, -3, 0], [0, 0, -3, 3, 0, 0, -3, 0, 0, 0, 1, -2, 3, 1, 0, 1], [-3, 1, 0, 0, 1, 7, 0, -1, 4, 2, 0, 0, 0, 0, -1, 0], [-5, 1, 0, 0, -2, 5, 0, -12, 0, 1, 0, 0, 0, 0, 1, 0], [0, 0, 0, 1, 0, 0, 5, 0, 0, 0, 0, -5, 0, 0, 0, -1], [-8, 4, 0, 0, -2, 2, 0, 0, 8, -2, 0, 0, 0, 0, -2, 0], [0, 0, 0, -4, 0, 0, -4, 0, 0, 0, 4, 2, 0, -4, 0, 2], [0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 2, 3, 0, -2, 0, -4], [-2, -2, 0, 0, 0, 4, 0, -4, 0, 2, 0, 0, 0, 0, 0, 0], [0, 0, -2, 1, 0, 0, -2, 0, 0, 0, 0, -3, -2, -2, 0, 3], [7, -4, 0, 0, 1, -1, 0, 1, -5, 4, 0, 0, 0, 0, -1, 0], [8, 2, 0, 0, -1, -11, 0, 6, -8, -1, 0, 0, 0, 0, -1, 0], [-1, -1, 0, 0, 3, -5, 0, -3, 4, 2, 0, 0, 0, 0, 1, 0], [0, 0, -2, 2, 0, 0, -2, 0, 0, 0, -2, 0, 2, -2, 0, 2], [-2, 2, 0, 0, 0, 0, 0, 0, 6, 2, 0, 0, 0, 0, 0, 0], [0, 0, 3, 0, 0, 0, -2, 0, 0, 0, 1, 2, -1, -4, 0, 0], [0, 0, 0, -3, 0, 0, 3, 0, 0, 0, -3, 0, 3, 0, 0, 0], [0, 0, -1, -1, 0, 0, 2, 0, 0, 0, -2, 3, -3, -1, 0, -3], [-1, 2, 0, 0, 0, 0, 0, 2, -1, 0, 0, 0, 0, 0, 2, 0], [1, -4, 0, 0, 1, 2, 0, -2, -2, 4, 0, 0, 0, 0, -1, 0], [0, 0, -3, 2, 0, 0, 4, 0, 0, 0, -1, 2, -4, -3, 0, -2], [0, 0, -2, -3, 0, 0, -1, 0, 0, 0, -3, 4, 5, 2, 0, 4], [0, 0, 1, -4, 0, 0, 4, 0, 0, 0, -1, 0, 0, -1, 0, 0], [7, -4, 0, 0, 1, -3, 0, -1, -6, -3, 0, 0, 0, 0, 4, 0], [0, 0, 2, -1, 0, 0, -1, 0, 0, 0, 1, 2, 2, -1, 0, -1], [0, 0, 1, 4, 0, 0, -2, 0, 0, 0, 1, 2, -1, -2, 0, -4], [6, -2, 0, 0, 2, 8, 0, -14, 0, 0, 0, 0, 0, 0, -2, 0], [-2, -1, 0, 0, 1, 1, 0, -6, -4, -1, 0, 0, 0, 0, 0, 0], [0, 0, 3, -1, 0, 0, -7, 0, 0, 0, 1, 7, -1, -4, 0, 1], [0, 0, 0, 5, 0, 0, 5, 0, 0, 0, -2, -2, 0, 2, 0, -3], [0, 0, 0, -1, 0, 0, 6, 0, 0, 0, 1, 7, 1, 0, 0, -7], [0, 0, 0, -2, 0, 0, 2, 0, 0, 0, 2, 2, 2, 2, 0, -2], [0, 0, -1, 8, 0, 0, -8, 0, 0, 0, -2, -2, 1, -2, 0, 6], [6, 4, 0, 0, -2, 4, 0, -4, -2, -4, 0, 0, 0, 0, 2, 0], [-6, 4, 0, 0, -2, -10, 0, -6, 8, 4, 0, 0, 0, 0, -2, 0], [3, -2, 0, 0, 1, 8, 0, 6, -7, -2, 0, 0, 0, 0, 1, 0], [11, 3, 0, 0, 1, 1, 0, -8, 9, -1, 0, 0, 0, 0, 4, 0], [0, 0, 1, 1, 0, 0, 4, 0, 0, 0, -1, -4, 1, 0, 0, -1], [0, 0, 7, 0, 0, 0, -4, 0, 0, 0, -3, 4, -4, -7, 0, 4], [-8, -3, 0, 0, -1, -1, 0, 2, -6, 1, 0, 0, 0, 0, -4, 0], [0, 0, 3, 8, 0, 0, 0, 0, 0, 0, 2, -8, 5, 3, 0, 8], [-4, 0, 0, 0, -6, -6, 0, 6, 0, 6, 0, 0, 0, 0, 0, 0], [4, -3, 0, 0, 6, 9, 0, -12, 0, -3, 0, 0, 0, 0, -3, 0], [0, 0, -2, -2, 0, 0, 4, 0, 0, 0, 0, -2, 2, 2, 0, -2], [-1, 1, 0, 0, 5, -3, 0, -5, 0, 6, 0, 0, 0, 0, -1, 0], [0, 0, -1, -3, 0, 0, 8, 0, 0, 0, 1, -8, -1, 0, 0, 3], [-11, 7, 0, 0, -3, -16, 0, 3, 8, 4, 0, 0, 0, 0, -7, 0], [0, 0, 0, 2, 0, 0, -4, 0, 0, 0, 3, 4, -3, -3, 0, -2], [0, 0, 4, 2, 0, 0, 2, 0, 0, 0, -5, 1, 4, 5, 0, -3], [6, -4, 0, 0, 4, 0, 0, -2, -6, 4, 0, 0, 0, 0, 0, 0], [-25, 1, 0, 0, 2, 4, 0, -4, 14, -1, 0, 0, 0, 0, -2, 0], [0, 0, 5, 4, 0, 0, 0, 0, 0, 0, -5, -4, 0, 5, 0, 4], [0, 0, 0, -6, 0, 0, 6, 0, 0, 0, 2, -2, 0, 2, 0, -8], [-3, 0, 0, 0, 3, -6, 0, 6, 3, 0, 0, 0, 0, 0, -3, 0], [-11, 4, 0, 0, 0, 8, 0, 0, 14, 4, 0, 0, 0, 0, -4, 0], [-9, 5, 0, 0, -4, -5, 0, 3, -10, 5, 0, 0, 0, 0, -4, 0], [0, 0, -3, 2, 0, 0, 1, 0, 0, 0, -5, 1, -5, -8, 0, 2], [-6, 5, 0, 0, -1, 1, 0, 3, 1, 5, 0, 0, 0, 0, -1, 0], [0, 0, 6, 1, 0, 0, 2, 0, 0, 0, -5, 2, -5, 1, 0, 1], [0, 0, -3, -4, 0, 0, 2, 0, 0, 0, 2, 2, 1, 3, 0, 2], [-5, 2, 0, 0, -3, 0, 0, 6, 18, 2, 0, 0, 0, 0, -3, 0], [21, 6, 0, 0, -3, 6, 0, -6, -9, -6, 0, 0, 0, 0, 3, 0], [-6, 5, 0, 0, -2, -5, 0, 8, 0, -3, 0, 0, 0, 0, 5, 0], [0, 0, 5, -6, 0, 0, 6, 0, 0, 0, -8, 0, 3, -5, 0, 0], [0, 0, 1, 4, 0, 0, -5, 0, 0, 0, 6, 1, -7, -1, 0, 1], [0, 0, 3, 4, 0, 0, 4, 0, 0, 0, 2, -2, 3, -2, 0, -2], [0, 0, -5, 0, 0, 0, -5, 0, 0, 0, 3, 5, -3, 2, 0, 0], [-20, -4, 0, 0, 2, 10, 0, -6, 20, 2, 0, 0, 0, 0, 2, 0], [-11, -3, 0, 0, 3, -3, 0, 0, 11, 3, 0, 0, 0, 0, 0, 0], [-7, -1, 0, 0, -6, 2, 0, -2, 0, 1, 0, 0, 0, 0, 6, 0], [0, 0, 3, 1, 0, 0, -1, 0, 0, 0, 4, -1, 4, 7, 0, 1], [-23, 0, 0, 0, -1, -12, 0, 12, 11, 0, 0, 0, 0, 0, 1, 0], [19, -5, 0, 0, 1, -1, 0, 0, -19, 1, 0, 0, 0, 0, 4, 0], [0, 0, 9, 4, 0, 0, -4, 0, 0, 0, -4, 4, -9, -4, 0, 8], [0, 0, 3, 2, 0, 0, 1, 0, 0, 0, -4, 1, -4, -1, 0, 2], [0, 0, 0, -2, 0, 0, 2, 0, 0, 0, 0, 2, 0, 0, 0, -2], [8, -4, 0, 0, 0, 0, 0, -4, 8, 0, 0, 0, 0, 0, -4, 0], [0, 0, 2, 2, 0, 0, 6, 0, 0, 0, -5, -6, 5, 3, 0, -2], [0, 0, 4, -6, 0, 0, -8, 0, 0, 0, 4, -2, 8, 4, 0, 2], [-7, 5, 0, 0, -2, -4, 0, 0, -6, 5, 0, 0, 0, 0, -2, 0], [21, 0, 0, 0, 3, 0, 0, 0, -9, 0, 0, 0, 0, 0, -3, 0], [0, 0, 2, -3, 0, 0, -11, 0, 0, 0, 5, -8, 7, 2, 0, 8], [5, 6, 0, 0, -3, 3, 0, -9, 0, -3, 0, 0, 0, 0, 6, 0], [11, -7, 0, 0, 3, 4, 0, -3, -8, -4, 0, 0, 0, 0, 7, 0], [0, 0, 3, 3, 0, 0, -3, 0, 0, 0, -4, 7, -3, -4, 0, 10], [0, 0, 2, 6, 0, 0, 6, 0, 0, 0, -9, -8, 2, 9, 0, 2], [14, -4, 0, 0, 6, 4, 0, -6, -20, 2, 0, 0, 0, 0, 4, 0], [-20, 4, 0, 0, -6, -6, 0, -14, -8, 6, 0, 0, 0, 0, -2, 0], [0, 0, -5, -2, 0, 0, -5, 0, 0, 0, 1, 5, -1, 4, 0, 2], [12, 1, 0, 0, -1, 9, 0, -4, -12, -1, 0, 0, 0, 0, 0, 0], [0, 0, 2, 7, 0, 0, 7, 0, 0, 0, -7, -11, 2, 7, 0, 4], [-9, 2, 0, 0, -1, -10, 0, 10, 5, -2, 0, 0, 0, 0, 1, 0], [0, 0, 4, 5, 0, 0, -5, 0, 0, 0, -3, 0, -4, -3, 0, 5], [-15, 1, 0, 0, 1, 19, 0, -1, 28, 2, 0, 0, 0, 0, -1, 0], [0, 0, 0, 0, 0, -6, 0, -6, 14, 0, 0, 0, 0, 0, 0, 0], [0, 0, 1, -4, 0, 0, -4, 0, 0, 0, 3, -4, 3, 4, 0, -4], [0, 0, 0, -2, 0, 0, -6, 0, 0, 0, -2, 6, 2, 2, 0, 2], [0, 0, -1, -5, 0, 0, -1, 0, 0, 0, -4, 4, -5, -1, 0, -4], [9, -6, 0, 0, 3, 12, 0, 6, -11, -6, 0, 0, 0, 0, 3, 0], [2, -2, 0, 0, 8, -20, 0, 20, 2, 2, 0, 0, 0, 0, -8, 0], [14, 0, 0, 0, 7, 0, 0, 7, 0, -7, 0, 0, 0, 0, 0, 0], [-17, 3, 0, 0, -3, -9, 0, 15, 0, 0, 0, 0, 0, 0, 3, 0], [0, 0, 2, 0, 0, 0, -8, 0, 0, 0, -6, 8, 4, -2, 0, 8], [0, 0, 0, -10, 0, 0, 10, 0, 0, 0, 4, 0, 0, 4, 0, -10], [0, 0, 0, 3, 0, 0, 3, 0, 0, 0, 0, -10, 0, 0, 0, 7], [0, 0, 10, -1, 0, 0, -2, 0, 0, 0, -10, 2, 10, 0, 0, 1], [0, 0, -6, 5, 0, 0, 5, 0, 0, 0, 1, 6, -6, -1, 0, -11], [15, -6, 0, 0, 3, 24, 0, -24, -9, 6, 0, 0, 0, 0, -3, 0], [0, 0, -1, -2, 0, 0, 5, 0, 0, 0, 5, 7, 4, -1, 0, -7], [-18, 0, 0, 0, -6, 0, 0, 0, 6, 0, 0, 0, 0, 0, 6, 0], [-14, 6, 0, 0, 3, 15, 0, -9, 14, 3, 0, 0, 0, 0, -9, 0], [-18, 6, 0, 0, -6, 0, 0, 6, 24, 0, 0, 0, 0, 0, -6, 0], [0, 0, -2, -7, 0, 0, 7, 0, 0, 0, 7, -9, 2, 7, 0, -16], [0, 0, -2, 0, 0, 0, -2, 0, 0, 0, 6, -2, 6, 4, 0, 0], [0, 0, -6, 6, 0, 0, 5, 0, 0, 0, 6, -5, -6, 0, 0, -6], [0, 0, 8, 2, 0, 0, -6, 0, 0, 0, -10, 4, 2, -8, 0, 4], [0, 0, 3, 2, 0, 0, -1, 0, 0, 0, -3, -3, 0, 3, 0, 3], [-5, 7, 0, 0, -3, -3, 0, -5, 1, 3, 0, 0, 0, 0, 4, 0], [-10, 0, 0, 0, 0, 6, 0, -12, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, -2, -4, 0, 0, 14, 0, 0, 0, 4, -10, -2, 2, 0, -10], [-8, -5, 0, 0, -2, -7, 0, 12, 0, 7, 0, 0, 0, 0, -5, 0], [0, 0, -1, -4, 0, 0, 8, 0, 0, 0, 0, -4, 1, 1, 0, -4], [-14, -3, 0, 0, 6, -3, 0, 12, 0, -3, 0, 0, 0, 0, -3, 0], [-10, 1, 0, 0, -1, -1, 0, -18, -8, 1, 0, 0, 0, 0, 0, 0], [-23, -1, 0, 0, 1, -3, 0, 1, 23, 1, 0, 0, 0, 0, 0, 0], [0, 0, -4, -6, 0, 0, -6, 0, 0, 0, 0, 0, -4, 0, 0, 6], [0, 0, 2, 0, 0, 0, -10, 0, 0, 0, -4, -10, -2, 2, 0, 10], [0, 0, -1, -3, 0, 0, -1, 0, 0, 0, -3, -1, -3, -4, 0, -3], [7, 0, 0, 0, 5, 6, 0, -6, -1, 0, 0, 0, 0, 0, -5, 0], [-12, 3, 0, 0, -6, -45, 0, 6, 18, -3, 0, 0, 0, 0, -3, 0], [5, -4, 0, 0, 1, -4, 0, -6, -6, -4, 0, 0, 0, 0, 1, 0], [0, 0, -3, -9, 0, 0, 3, 0, 0, 0, 5, 3, 5, 2, 0, -9], [-17, 5, 0, 0, -5, -5, 0, -6, -7, 5, 0, 0, 0, 0, 0, 0], [0, 0, -4, 0, 0, 0, -2, 0, 0, 0, 0, 2, 4, 4, 0, 2], [-12, 10, 0, 0, -2, -10, 0, -6, -10, 10, 0, 0, 0, 0, -2, 0], [0, 0, 4, 9, 0, 0, 2, 0, 0, 0, -10, -7, -6, 4, 0, 7], [8, -4, 0, 0, 8, -8, 0, 24, 0, -4, 0, 0, 0, 0, -4, 0], [0, 0, -7, 5, 0, 0, -5, 0, 0, 0, 4, 0, 3, 7, 0, 0], [10, 5, 0, 0, -2, -9, 0, 2, -30, 3, 0, 0, 0, 0, -5, 0], [0, 0, -6, 3, 0, 0, -3, 0, 0, 0, 4, -10, 6, 4, 0, -7], [-12, 5, 0, 0, -4, -4, 0, 4, 14, 1, 0, 0, 0, 0, -5, 0], [11, -2, 0, 0, -8, -10, 0, 12, 0, 10, 0, 0, 0, 0, -2, 0], [0, 0, -7, 2, 0, 0, -8, 0, 0, 0, 3, 8, -3, 4, 0, -2], [0, 0, -10, -4, 0, 0, -4, 0, 0, 0, 4, 0, -10, -4, 0, 4], [7, -5, 0, 0, 7, 5, 0, -6, -7, 7, 0, 0, 0, 0, -2, 0], [-4, 4, 0, 0, -4, -32, 0, 32, 2, -4, 0, 0, 0, 0, 4, 0], [0, 0, 2, -8, 0, 0, -4, 0, 0, 0, 0, 4, 2, 2, 0, -4], [0, 0, -6, -1, 0, 0, 1, 0, 0, 0, -2, -2, 6, -2, 0, -3], [12, -5, 0, 0, 7, 26, 0, 12, 10, -5, 0, 0, 0, 0, 7, 0], [0, 0, -8, -3, 0, 0, -2, 0, 0, 0, 13, -2, 13, 5, 0, -3], [-12, 10, 0, 0, -2, -16, 0, -12, 10, 10, 0, 0, 0, 0, -2, 0], [0, 0, 4, -4, 0, 0, 2, 0, 0, 0, 9, 2, 9, 13, 0, -4], [-14, 3, 0, 0, -4, -4, 0, 11, -6, 4, 0, 0, 0, 0, -1, 0], [0, 0, -3, 8, 0, 0, -9, 0, 0, 0, 10, 1, -7, 3, 0, 1], [-8, 6, 0, 0, -2, -16, 0, -12, 0, 6, 0, 0, 0, 0, -2, 0], [0, 0, -5, 3, 0, 0, 0, 0, 0, 0, -6, -3, -11, -5, 0, 3], [-5, 6, 0, 0, -4, -6, 0, 8, 0, -2, 0, 0, 0, 0, 6, 0], [0, 0, 0, -8, 0, 0, -8, 0, 0, 0, 2, 2, 0, -2, 0, 6], [0, 0, 12, 0, 0, 0, 0, 0, 0, 0, -5, 0, 5, -7, 0, 0], [17, -3, 0, 0, 7, 7, 0, 34, 3, -7, 0, 0, 0, 0, 4, 0], [5, 1, 0, 0, 7, 5, 0, -6, -5, 7, 0, 0, 0, 0, -8, 0], [0, 0, 4, -4, 0, 0, -4, 0, 0, 0, -2, 13, 4, 2, 0, -9], [-35, 4, 0, 0, 3, 16, 0, -16, 21, -4, 0, 0, 0, 0, -3, 0], [0, 0, -12, 4, 0, 0, 2, 0, 0, 0, 11, 2, 11, -1, 0, 4], [-42, 4, 0, 0, 5, 15, 0, -10, 42, 5, 0, 0, 0, 0, -9, 0], [3, 1, 0, 0, 4, 14, 0, 6, -20, 1, 0, 0, 0, 0, 4, 0], [0, 0, 8, 8, 0, 0, -18, 0, 0, 0, 3, -18, 3, 11, 0, 8], [0, 0, -2, 12, 0, 0, -14, 0, 0, 0, 4, -14, 4, 2, 0, 12], [-12, 2, 0, 0, -4, -4, 0, 16, -4, 4, 0, 0, 0, 0, -2, 0], [0, 0, 2, -2, 0, 0, -14, 0, 0, 0, 0, 14, 0, -2, 0, 2], [0, 0, 11, 3, 0, 0, -6, 0, 0, 0, 4, -9, 15, 11, 0, 9], [0, 0, -17, -6, 0, 0, 2, 0, 0, 0, 3, 8, -14, -17, 0, -8], [0, 0, -10, -13, 0, 0, 14, 0, 0, 0, 9, -1, 1, 10, 0, -1], [0, 0, -6, 8, 0, 0, 8, 0, 0, 0, -5, 7, -6, 5, 0, -15], [0, 0, -4, 0, 0, 0, -2, 0, 0, 0, -4, 2, 4, 8, 0, 0], [-22, 9, 0, 0, -2, -1, 0, 2, 26, 7, 0, 0, 0, 0, -9, 0], [-23, 7, 0, 0, -3, -3, 0, 4, -17, 3, 0, 0, 0, 0, 4, 0], [0, 0, -3, 6, 0, 0, -1, 0, 0, 0, -2, 1, 2, 5, 0, -6], [-20, -2, 0, 0, 7, -7, 0, 0, 20, 7, 0, 0, 0, 0, -5, 0], [0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 5, -9, 0, -5, 0, 8], [26, 2, 0, 0, -4, 40, 0, -18, -26, -4, 0, 0, 0, 0, 2, 0], [0, 0, 6, -3, 0, 0, -3, 0, 0, 0, -9, -8, 6, 9, 0, 11], [0, 0, -7, 4, 0, 0, -14, 0, 0, 0, 7, -14, 7, 0, 0, 4], [0, 0, 5, -6, 0, 0, 6, 0, 0, 0, -12, 10, -5, -12, 0, 4], [25, 3, 0, 0, -7, 17, 0, -5, -25, -7, 0, 0, 0, 0, 4, 0], [0, 0, 3, 0, 0, 0, -12, 0, 0, 0, -9, 12, 6, -3, 0, 12], [-14, -2, 0, 0, 0, 0, 0, -2, -14, 0, 0, 0, 0, 0, -2, 0], [-29, 7, 0, 0, 0, -2, 0, 2, 18, -7, 0, 0, 0, 0, 0, 0], [16, 8, 0, 0, -4, 10, 0, -24, 0, -4, 0, 0, 0, 0, 8, 0], [0, 0, -6, -12, 0, 0, 12, 0, 0, 0, 3, 6, 6, 3, 0, -6], [15, -6, 0, 0, -6, -18, 0, 6, -18, -12, 0, 0, 0, 0, 6, 0], [22, -2, 0, 0, -6, -26, 0, 16, -22, -6, 0, 0, 0, 0, 8, 0], [0, 0, 3, -5, 0, 0, -5, 0, 0, 0, 8, -5, 3, -8, 0, 10], [2, -4, 0, 0, -4, 4, 0, 0, -2, -4, 0, 0, 0, 0, 8, 0], [0, 0, 0, -14, 0, 0, -14, 0, 0, 0, 2, 14, 0, -2, 0, 0], [-17, -10, 0, 0, 1, -22, 0, 22, 4, 10, 0, 0, 0, 0, -1, 0], [0, 0, 8, -4, 0, 0, 4, 0, 0, 0, 1, 8, -8, 1, 0, 4], [4, 6, 0, 0, -10, -12, 0, 12, -4, -6, 0, 0, 0, 0, 10, 0], [12, -4, 0, 0, 6, 50, 0, -28, -12, 6, 0, 0, 0, 0, -2, 0], [0, 0, -8, 3, 0, 0, -3, 0, 0, 0, 3, -8, 8, 3, 0, -5], [-16, 3, 0, 0, -13, -5, 0, 21, 1, 3, 0, 0, 0, 0, -13, 0], [5, 3, 0, 0, 1, 1, 0, -26, 3, -1, 0, 0, 0, 0, 4, 0], [0, 0, -3, 0, 0, 0, 7, 0, 0, 0, 5, -7, -5, -2, 0, 0], [0, 0, 0, 6, 0, 0, 0, 0, 0, 0, -6, -6, 6, 0, 0, -6], [0, 0, -8, -4, 0, 0, -2, 0, 0, 0, 6, 2, -2, -8, 0, -2], [22, -4, 0, 0, 10, 10, 0, 6, 2, -10, 0, 0, 0, 0, 6, 0], [19, 6, 0, 0, -1, -30, 0, 30, -7, -6, 0, 0, 0, 0, 1, 0], [0, 0, -13, 12, 0, 0, -18, 0, 0, 0, 10, 6, 3, 13, 0, 6], [6, -5, 0, 0, 4, -23, 0, -4, -2, -1, 0, 0, 0, 0, 5, 0], [0, 0, 2, -3, 0, 0, -6, 0, 0, 0, -6, 6, 6, 4, 0, 3], [0, 0, -2, -4, 0, 0, -6, 0, 0, 0, 2, 6, -2, 0, 0, 4], [18, 0, 0, 0, 1, -35, 0, 17, -18, 1, 0, 0, 0, 0, -1, 0], [0, 0, -13, 0, 0, 0, 0, 0, 0, 0, 6, 10, -13, -6, 0, -10], [0, 0, -4, -2, 0, 0, -2, 0, 0, 0, -7, 12, -4, 7, 0, -10], [0, 0, -3, 6, 0, 0, -14, 0, 0, 0, 6, -20, 3, -3, 0, 20], [0, 0, -9, -2, 0, 0, -7, 0, 0, 0, 8, -7, 8, -1, 0, -2], [-10, -12, 0, 0, 4, 28, 0, -16, 10, 4, 0, 0, 0, 0, 8, 0], [17, -6, 0, 0, 7, 11, 0, -7, -22, 1, 0, 0, 0, 0, 6, 0], [-1, 3, 0, 0, 2, -14, 0, -18, -2, 3, 0, 0, 0, 0, 2, 0], [0, 0, -12, -4, 0, 0, 4, 0, 0, 0, 17, 4, 17, 5, 0, -4], [41, -11, 0, 0, 14, 14, 0, 24, 13, -14, 0, 0, 0, 0, 3, 0], [0, 0, -12, 2, 0, 0, 4, 0, 0, 0, -4, -4, 4, 16, 0, -2], [0, 0, -8, 12, 0, 0, -1, 0, 0, 0, 12, -11, -4, 8, 0, -11], [-11, 9, 0, 0, -7, -7, 0, -28, 3, 7, 0, 0, 0, 0, 2, 0], [-9, -1, 0, 0, -10, -26, 0, -6, 16, -1, 0, 0, 0, 0, -10, 0], [0, 0, 7, 13, 0, 0, 7, 0, 0, 0, -4, -6, 3, 7, 0, 6], [0, 0, 6, -3, 0, 0, -2, 0, 0, 0, 2, 5, -8, -6, 0, 5], [0, 0, 10, -8, 0, 0, -6, 0, 0, 0, -7, 6, 7, -3, 0, 8], [-23, -1, 0, 0, 1, -17, 0, 35, 0, 0, 0, 0, 0, 0, -1, 0], [-3, 11, 0, 0, -7, -7, 0, -20, 11, 7, 0, 0, 0, 0, 4, 0], [0, 0, -11, -5, 0, 0, 4, 0, 0, 0, -5, -4, 5, 16, 0, 5], [0, 0, 3, 17, 0, 0, 2, 0, 0, 0, -6, -15, -3, 3, 0, 15], [0, 0, 10, -8, 0, 0, 18, 0, 0, 0, -12, 18, -12, -2, 0, -8], [0, 0, -3, 7, 0, 0, -7, 0, 0, 0, 2, -13, 3, 2, 0, -6], [-5, 7, 0, 0, -3, -49, 0, 3, -4, 4, 0, 0, 0, 0, -7, 0], [0, 0, -2, -4, 0, 0, 8, 0, 0, 0, 7, 8, 7, 5, 0, -4], [19, -8, 0, 0, 11, 22, 0, 0, -7, -8, 0, 0, 0, 0, 11, 0], [-6, 0, 0, 0, 6, 6, 0, -30, -18, -6, 0, 0, 0, 0, 6, 0], [0, 0, -7, 12, 0, 0, -1, 0, 0, 0, -4, -13, -11, -7, 0, 13], [-14, 6, 0, 0, -8, -16, 0, 0, -30, 6, 0, 0, 0, 0, -8, 0], [0, 0, -13, 2, 0, 0, 8, 0, 0, 0, 7, 6, -6, -13, 0, -6], [-11, -3, 0, 0, 9, 9, 0, -9, 0, -6, 0, 0, 0, 0, -3, 0], [0, 0, 9, 16, 0, 0, -16, 0, 0, 0, -10, -10, -9, -10, 0, 6], [0, 0, -6, 8, 0, 0, 4, 0, 0, 0, 2, -4, -2, 4, 0, -8], [-20, 6, 0, 0, 2, -8, 0, -2, 28, 8, 0, 0, 0, 0, -6, 0], [33, -1, 0, 0, 7, -11, 0, 29, 0, -6, 0, 0, 0, 0, -1, 0], [19, 3, 0, 0, -1, 5, 0, -2, -19, -1, 0, 0, 0, 0, -2, 0], [0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 9, 15, -1, -9, 0, -15], [0, 0, 3, -18, 0, 0, 12, 0, 0, 0, -5, 12, -5, -2, 0, -18], [8, -8, 0, 0, -4, 24, 0, -10, -8, -4, 0, 0, 0, 0, 12, 0], [0, 0, 0, 10, 0, 0, 2, 0, 0, 0, -6, 2, -6, -6, 0, 10], [0, 0, 3, 3, 0, 0, -1, 0, 0, 0, -3, 1, 3, 0, 0, -3], [0, 0, 8, -1, 0, 0, -2, 0, 0, 0, 1, -1, 9, 8, 0, 1], [-26, -3, 0, 0, 2, 2, 0, 11, -30, -2, 0, 0, 0, 0, -1, 0], [3, 2, 0, 0, 5, -8, 0, -18, -16, 2, 0, 0, 0, 0, 5, 0], [13, -5, 0, 0, -6, -44, 0, 44, -12, 5, 0, 0, 0, 0, 6, 0], [0, 0, -4, -22, 0, 0, -8, 0, 0, 0, 4, 14, 0, -4, 0, -14], [0, 0, 3, -2, 0, 0, 6, 0, 0, 0, -13, -4, 10, -3, 0, -4], [-21, 13, 0, 0, -5, -29, 0, 5, 16, 8, 0, 0, 0, 0, -13, 0], [0, 0, -1, 15, 0, 0, 15, 0, 0, 0, -9, 2, -1, 9, 0, -17], [11, -5, 0, 0, 11, 6, 0, -11, -12, 6, 0, 0, 0, 0, 5, 0], [0, 0, 11, -7, 0, 0, -7, 0, 0, 0, -2, 21, 11, 2, 0, -14], [-16, 6, 0, 0, 1, 1, 0, -1, 16, 1, 0, 0, 0, 0, -7, 0], [0, 0, 8, 6, 0, 0, -19, 0, 0, 0, 8, -19, 8, 16, 0, 6], [0, 0, 8, 6, 0, 0, -6, 0, 0, 0, -7, 4, -8, -7, 0, 10], [0, 0, -7, 7, 0, 0, 1, 0, 0, 0, -11, 1, -11, -18, 0, 7], [0, 0, -10, 3, 0, 0, -10, 0, 0, 0, 8, -10, 8, -2, 0, 3], [0, 0, 6, -11, 0, 0, 6, 0, 0, 0, 2, -6, -2, -8, 0, 11], [0, 0, -7, -12, 0, 0, -4, 0, 0, 0, 1, 8, -6, -7, 0, -8], [-4, -6, 0, 0, 1, 1, 0, 13, -6, -1, 0, 0, 0, 0, -5, 0], [-9, 10, 0, 0, 1, -7, 0, -9, 7, 10, 0, 0, 0, 0, 1, 0]];
    aps := ConvertToHeckeField(raw_aps);
    chi := MakeCharacter_2646_t_Hecke(Universe(aps));
    return ExtendMultiplicatively(weight, aps, chi);
end function;


// To make the newform (type ModFrm), type "MakeNewformModFrm_2646_2_t_a();".
// 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_2646_2_t_a(:prec:=16)
    chi := MakeCharacter_2646_t();
    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_2646_2_t_a();".
// 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_2646_2_t_a( : sign := -1)
    R<x> := PolynomialRing(Rationals());
    chi := MakeCharacter_2646_t();
    // SetVerbose("ModularSymbols", true);
    Snew := NewSubspace(CuspidalSubspace(ModularSymbols(chi,2,sign)));
    Vf := Kernel([<5,R![36, 0, -288, 0, 153, 0, -24, 0, 1]>],Snew);
    return Vf;
end function;