/*
  This code can be loaded, or copied and pasted, into Magma.
  It will load the data associated to the HMF, including
  the field, level, and Hecke and Atkin-Lehner eigenvalue data.
  At the *bottom* of the file, there is code to recreate the
  Hilbert modular form in Magma, by creating the HMF space
  and cutting out the corresponding Hecke irreducible subspace.
  From there, you can ask for more eigenvalues or modify as desired.
  It is commented out, as this computation may be lengthy.
*/

P<x> := PolynomialRing(Rationals());
g := P![3, 1, -5, -1, 1];
F<w> := NumberField(g);
ZF := Integers(F);

NN := ideal<ZF | {35, 35, -w^2 + 4}>;

primesArray := [
[3, 3, w],
[5, 5, -w^3 + w^2 + 4*w + 1],
[7, 7, -w^2 + 2],
[7, 7, -w^2 + w + 2],
[16, 2, 2],
[17, 17, -w^3 + w^2 + 4*w - 2],
[23, 23, -w^3 + 2*w^2 + 3*w - 2],
[27, 3, -w^3 + w^2 + 5*w - 1],
[37, 37, -w^3 + 4*w + 1],
[37, 37, -w^3 + w^2 + 2*w + 1],
[49, 7, -w^3 + 3*w^2 + 2*w - 4],
[61, 61, -w^3 + 2*w^2 + 4*w - 2],
[61, 61, -w^3 + 3*w^2 + 2*w - 7],
[67, 67, w^2 - 3*w - 2],
[71, 71, -w^2 + 5],
[71, 71, 2*w^3 - w^2 - 9*w - 2],
[71, 71, w^2 - 2*w - 5],
[79, 79, w^2 - 3*w - 1],
[79, 79, w^3 - 6*w - 1],
[89, 89, -w^3 + 3*w^2 + 3*w - 7],
[97, 97, -w^3 + 2*w^2 + 2*w - 5],
[101, 101, -w^3 + 3*w^2 + 2*w - 5],
[107, 107, 2*w^3 - 2*w^2 - 9*w - 1],
[109, 109, -w^3 + 5*w + 1],
[125, 5, 2*w^3 - w^2 - 8*w - 2],
[131, 131, -2*w^3 + 3*w^2 + 7*w - 2],
[131, 131, 2*w^2 - 3*w - 7],
[131, 131, 2*w^3 - 3*w^2 - 6*w + 2],
[137, 137, w^3 - 2*w^2 - 3*w + 7],
[139, 139, w^3 - 4*w + 2],
[151, 151, w^2 + w - 4],
[157, 157, 2*w^2 - 2*w - 5],
[157, 157, w^3 - 2*w^2 - 5*w + 7],
[173, 173, 2*w^3 - 3*w^2 - 6*w + 4],
[179, 179, 2*w^3 - 3*w^2 - 9*w + 4],
[181, 181, w^3 + w^2 - 7*w - 4],
[197, 197, w^3 - 3*w^2 - w + 7],
[223, 223, 3*w^3 - 4*w^2 - 11*w + 4],
[223, 223, -w^3 + w^2 + 4*w - 5],
[227, 227, 2*w^3 - 2*w^2 - 9*w - 2],
[229, 229, w^3 - w^2 - 6*w + 2],
[229, 229, 4*w^3 - 6*w^2 - 14*w + 7],
[233, 233, 2*w^3 - 3*w^2 - 5*w + 1],
[239, 239, -w - 4],
[239, 239, -2*w^3 + 4*w^2 + 5*w - 8],
[241, 241, -2*w^3 + w^2 + 10*w + 1],
[251, 251, -w^3 + 2*w^2 + 2*w - 8],
[251, 251, -2*w^3 + 5*w^2 + 5*w - 8],
[257, 257, 2*w^3 - 2*w^2 - 7*w + 1],
[263, 263, w^3 - 4*w^2 - 4*w + 7],
[269, 269, w^2 + 2*w - 4],
[269, 269, 2*w^2 - 7],
[271, 271, 2*w^3 - 3*w^2 - 7*w + 1],
[271, 271, w^2 + 3*w - 2],
[271, 271, 3*w^3 - 5*w^2 - 11*w + 13],
[271, 271, -2*w^3 + 3*w^2 + 9*w - 2],
[277, 277, w^2 - w - 7],
[277, 277, 3*w^3 - 4*w^2 - 13*w + 5],
[277, 277, -w^3 + w^2 + 3*w - 5],
[277, 277, w^3 - 3*w - 4],
[281, 281, w^3 - 2*w^2 - 2*w - 2],
[283, 283, w^2 + 3*w - 1],
[283, 283, w^3 - w^2 - 2*w - 4],
[293, 293, 3*w^3 - 4*w^2 - 12*w + 8],
[293, 293, w^2 + w - 5],
[307, 307, 2*w^3 - 2*w^2 - 6*w - 1],
[307, 307, -w^2 - 2],
[311, 311, -w^3 + 5*w - 1],
[313, 313, 2*w^3 - 2*w^2 - 8*w - 5],
[313, 313, -2*w^3 + 3*w^2 + 5*w - 2],
[317, 317, 2*w^3 - 2*w^2 - 9*w + 4],
[317, 317, w^3 - 2*w^2 - 3*w - 2],
[331, 331, -w^3 + 2*w^2 + w - 5],
[337, 337, -2*w^3 + 3*w^2 + 5*w - 7],
[337, 337, w^3 - 4*w^2 - w + 5],
[349, 349, -2*w^3 + w^2 + 11*w + 1],
[367, 367, -2*w^3 + 2*w^2 + 8*w - 5],
[379, 379, -w^3 + 2*w^2 - 4],
[383, 383, -3*w^3 + 6*w^2 + 9*w - 14],
[383, 383, w - 5],
[389, 389, 4*w^3 - 6*w^2 - 14*w + 11],
[397, 397, -2*w^3 + w^2 + 11*w - 1],
[397, 397, -3*w^3 + 2*w^2 + 12*w + 1],
[401, 401, 3*w - 7],
[409, 409, w^2 - 4*w - 1],
[421, 421, -2*w^3 + 4*w^2 + 7*w - 5],
[421, 421, -2*w^3 + 4*w^2 + 4*w - 7],
[443, 443, 2*w^3 - 2*w^2 - 10*w + 1],
[449, 449, -w^3 - w^2 + 2*w - 2],
[461, 461, 3*w^3 - 3*w^2 - 12*w + 4],
[463, 463, -2*w^3 + 2*w^2 + 6*w - 1],
[463, 463, -3*w^2 + 5*w + 4],
[467, 467, w^2 + w - 10],
[467, 467, 3*w^3 - 3*w^2 - 14*w + 1],
[479, 479, -2*w^3 + w^2 + 6*w + 1],
[491, 491, w^3 + 2*w^2 - 7*w - 8],
[499, 499, 4*w^3 - 5*w^2 - 16*w + 8],
[499, 499, w^3 - 3*w - 5],
[503, 503, -w^3 + 3*w^2 + w - 10],
[503, 503, w^3 - 3*w^2 - 4*w + 1],
[523, 523, -w^3 + 4*w - 4],
[541, 541, w^3 - 5*w^2 + 2*w + 10],
[547, 547, -3*w^3 + 6*w^2 + 11*w - 10],
[547, 547, -3*w^3 + 6*w^2 + 7*w - 10],
[557, 557, -w^3 + 3*w^2 + 4*w - 10],
[557, 557, 3*w^2 - 6*w - 8],
[557, 557, -w^3 + 4*w^2 - 11],
[557, 557, -2*w^3 + 4*w^2 + 5*w - 11],
[569, 569, w^3 + w^2 - 6*w - 11],
[571, 571, 3*w^3 - 4*w^2 - 10*w + 2],
[571, 571, w^3 - 3*w^2 - 5*w + 2],
[577, 577, 2*w^3 - w^2 - 7*w + 4],
[587, 587, 2*w^3 - 11*w - 4],
[607, 607, 2*w^3 - 3*w^2 - 9*w + 1],
[613, 613, -3*w^3 + 3*w^2 + 14*w - 5],
[617, 617, 2*w^3 - 3*w^2 - 8*w + 10],
[617, 617, 3*w^3 - 5*w^2 - 8*w + 10],
[643, 643, -w^3 + w^2 + 7*w + 1],
[643, 643, w^3 + 2*w^2 - 6*w - 8],
[661, 661, -3*w^3 + 5*w^2 + 8*w - 7],
[673, 673, -3*w^3 + 3*w^2 + 13*w - 4],
[683, 683, -w^3 + 2*w^2 - 5],
[683, 683, w^3 - w^2 - 4*w - 5],
[691, 691, w^3 + w^2 - 6*w - 2],
[691, 691, -w^3 + 3*w^2 - 7],
[709, 709, w^2 - w - 8],
[727, 727, -2*w^3 + 4*w^2 + 7*w - 4],
[733, 733, 3*w^3 - 5*w^2 - 7*w + 2],
[739, 739, -w^3 + 4*w^2 + w - 8],
[743, 743, 2*w^3 - 3*w^2 - 10*w + 7],
[751, 751, 3*w^2 - 3*w - 7],
[761, 761, w^2 + 3*w - 5],
[773, 773, 3*w^2 - w - 8],
[787, 787, w^3 - 5*w - 8],
[797, 797, -w^3 - w^2 + 7*w + 2],
[809, 809, 3*w^3 - 4*w^2 - 11*w - 4],
[811, 811, 3*w^2 - 4*w - 13],
[827, 827, -4*w^3 + 7*w^2 + 12*w - 7],
[827, 827, 2*w^2 + w - 7],
[839, 839, -2*w^2 + 5*w + 7],
[857, 857, -3*w^3 + 4*w^2 + 10*w - 4],
[857, 857, 2*w^3 - 3*w^2 - 8*w - 1],
[859, 859, -5*w^3 + 9*w^2 + 18*w - 16],
[863, 863, -2*w^3 + 4*w^2 + 6*w - 1],
[863, 863, -2*w^3 + w^2 + 8*w - 2],
[877, 877, w^3 - 3*w - 7],
[883, 883, -w^3 + w^2 + 7*w - 2],
[907, 907, 2*w^3 - w^2 - 12*w - 5],
[907, 907, 3*w^3 - 14*w - 7],
[911, 911, 5*w^3 - 5*w^2 - 21*w + 4],
[911, 911, w^3 - w^2 - w - 4],
[929, 929, 3*w^2 - 2*w - 7],
[941, 941, 4*w^3 - 5*w^2 - 14*w + 1],
[941, 941, 2*w^3 - 5*w^2 - 8*w + 7],
[953, 953, -w^3 - 3*w^2 + 9*w + 10],
[953, 953, -3*w^3 + 2*w^2 + 15*w - 1],
[953, 953, -3*w^3 + 5*w^2 + 9*w - 2],
[953, 953, 3*w^3 - 3*w^2 - 11*w + 1],
[961, 31, -3*w^2 + 5*w + 10],
[961, 31, -2*w^3 + 3*w^2 + 4*w - 7],
[967, 967, -w^3 - w^2 + 8*w + 1],
[977, 977, -2*w^3 + 3*w^2 + 10*w - 4],
[983, 983, 4*w^3 - 6*w^2 - 12*w + 11],
[983, 983, -w^3 + 2*w^2 + 7*w - 5],
[997, 997, 3*w^3 - 8*w^2 - 5*w + 13],
[1009, 1009, -2*w^3 + 4*w^2 + 6*w - 13],
[1009, 1009, 4*w^3 - 5*w^2 - 15*w + 1],
[1019, 1019, w^3 - 4*w^2 - w + 16],
[1031, 1031, -w^3 - w^2 + 6*w + 1],
[1033, 1033, -w^3 + 3*w^2 - 8],
[1049, 1049, -2*w^3 + 6*w^2 + 3*w - 11],
[1049, 1049, -2*w^3 + 4*w^2 + 3*w - 7],
[1051, 1051, -2*w^3 + 3*w^2 + 10*w - 5],
[1063, 1063, -3*w^3 + 3*w^2 + 11*w - 8],
[1063, 1063, -w^2 + 2*w - 4],
[1069, 1069, -3*w^3 + 4*w^2 + 9*w - 1],
[1087, 1087, w^2 - 5*w - 2],
[1087, 1087, 3*w^3 - 3*w^2 - 9*w + 5],
[1093, 1093, -2*w^3 + w^2 + 7*w + 8],
[1093, 1093, w^3 - 8*w - 2],
[1109, 1109, -5*w^3 + 8*w^2 + 17*w - 14],
[1109, 1109, -4*w^3 + 7*w^2 + 15*w - 11],
[1123, 1123, 4*w^3 - 6*w^2 - 14*w + 5],
[1129, 1129, 3*w^3 - 2*w^2 - 8*w + 4],
[1151, 1151, 4*w^3 - 5*w^2 - 12*w + 10],
[1151, 1151, -w^3 - 3*w^2 + 9*w + 11],
[1171, 1171, -w^3 - 3*w^2 + 8*w + 14],
[1171, 1171, -3*w^3 + 3*w^2 + 7*w - 8],
[1181, 1181, -4*w^2 + 5*w + 5],
[1181, 1181, -3*w^3 + 6*w^2 + 9*w - 7],
[1193, 1193, -2*w^3 + 6*w^2 + 3*w - 10],
[1193, 1193, -4*w^3 + 6*w^2 + 17*w - 11],
[1201, 1201, 3*w^3 - 4*w^2 - 6*w + 5],
[1201, 1201, -3*w^3 + 3*w^2 + 15*w - 5],
[1201, 1201, -2*w^3 + 5*w^2 + 4*w - 16],
[1201, 1201, 3*w^3 - 3*w^2 - 8*w - 4],
[1213, 1213, -3*w^3 + 4*w^2 + 14*w - 4],
[1217, 1217, -w^3 + 4*w^2 - 13],
[1229, 1229, -4*w^3 + 4*w^2 + 18*w - 5],
[1231, 1231, -w^3 + 2*w^2 + 7*w - 4],
[1277, 1277, 3*w^3 - 5*w^2 - 9*w - 1],
[1279, 1279, 4*w^3 - 5*w^2 - 14*w - 2],
[1291, 1291, 3*w^3 - 6*w^2 - 8*w + 5],
[1291, 1291, w^3 - 5*w^2 + 14],
[1301, 1301, -4*w^3 + 9*w^2 + 13*w - 20],
[1321, 1321, 3*w^3 - 4*w^2 - 9*w + 5],
[1367, 1367, -3*w^3 + 4*w^2 + 11*w + 1],
[1367, 1367, -w^3 + 2*w^2 - 8],
[1369, 37, -3*w^3 + 5*w^2 + 11*w - 5],
[1373, 1373, -2*w^3 - w^2 + 6*w - 1],
[1409, 1409, -2*w^3 + 6*w^2 + 4*w - 13],
[1439, 1439, -2*w^3 + 5*w^2 + 5*w - 17],
[1447, 1447, 6*w^3 - 9*w^2 - 23*w + 19],
[1447, 1447, 2*w^3 - 3*w^2 - 8*w + 11],
[1453, 1453, -w^3 + w^2 - 3*w - 2],
[1453, 1453, 2*w^3 - w^2 - 10*w + 2],
[1459, 1459, 3*w^3 - 2*w^2 - 5*w + 5],
[1471, 1471, -w^3 - w^2 + 6*w - 1],
[1481, 1481, w^3 - 6*w^2 + 20],
[1483, 1483, 2*w^3 - 4*w^2 - 5*w + 14],
[1483, 1483, -2*w^3 + 5*w^2 + 6*w - 17],
[1483, 1483, w^3 - 2*w^2 - 4*w + 10],
[1483, 1483, 3*w^3 - 4*w^2 - 9*w + 4],
[1487, 1487, -w^3 + 5*w^2 - 7],
[1487, 1487, -3*w^3 + 5*w^2 + 13*w - 5],
[1489, 1489, -w^2 - w - 4],
[1489, 1489, w^2 + 3*w + 5],
[1493, 1493, -3*w^3 + 2*w^2 + 12*w - 2],
[1499, 1499, -w^3 + 5*w^2 - w - 11],
[1511, 1511, 2*w^2 + 2*w - 7],
[1511, 1511, -w^3 + 5*w^2 - w - 8],
[1549, 1549, 2*w^3 - 4*w^2 - 7*w + 1],
[1559, 1559, w^3 - 2*w^2 - 2*w - 4],
[1567, 1567, 3*w^2 - w - 13],
[1567, 1567, -w^3 + w^2 + 3*w - 7],
[1583, 1583, -2*w^3 + 6*w^2 + 6*w - 11],
[1583, 1583, w^3 - 5*w^2 - 8*w + 8],
[1597, 1597, -4*w^3 + 5*w^2 + 10*w + 2],
[1597, 1597, 4*w^3 - 6*w^2 - 11*w + 1],
[1601, 1601, 5*w - 2],
[1607, 1607, -3*w^3 + 6*w^2 + 6*w - 10],
[1609, 1609, -2*w^3 + 6*w^2 + 5*w - 14],
[1613, 1613, 3*w^3 - 3*w^2 - 10*w + 2],
[1613, 1613, -4*w^3 + 9*w^2 + 12*w - 17],
[1621, 1621, -w^2 - 4],
[1621, 1621, 4*w^3 - 5*w^2 - 18*w + 5],
[1627, 1627, -3*w^3 + 4*w^2 + 8*w - 5],
[1627, 1627, -2*w^3 + 5*w - 5],
[1663, 1663, 4*w^3 - 2*w^2 - 19*w - 4],
[1667, 1667, 3*w^3 - 7*w^2 - 6*w + 4],
[1669, 1669, -5*w^3 + 9*w^2 + 14*w - 14],
[1669, 1669, -3*w^3 + 6*w^2 + 13*w - 8],
[1693, 1693, w^3 + w^2 - 4*w - 10],
[1697, 1697, 3*w^3 - 2*w^2 - 14*w - 10],
[1699, 1699, -2*w^3 + 4*w^2 + 3*w - 8],
[1709, 1709, -4*w^3 + 5*w^2 + 14*w - 7],
[1709, 1709, 4*w^3 - 6*w^2 - 13*w + 8],
[1721, 1721, w^3 - 2*w^2 - 4*w - 4],
[1753, 1753, w^3 - 3*w^2 - 2*w - 2],
[1753, 1753, -2*w^3 + 6*w^2 + 4*w - 11],
[1759, 1759, w^3 + 2*w^2 - 8*w - 4],
[1777, 1777, 2*w^3 + w^2 - 15*w - 10],
[1787, 1787, w^3 - w^2 - 8*w - 1],
[1789, 1789, 2*w^3 - 4*w^2 - 4*w + 11],
[1801, 1801, -w^3 + 5*w^2 - w - 16],
[1811, 1811, 2*w^3 - 3*w^2 - 5*w - 5],
[1823, 1823, 3*w^2 - 11],
[1823, 1823, w - 7],
[1831, 1831, w^3 - 2*w^2 - 3*w - 4],
[1847, 1847, -w^3 - w^2 + 9*w - 2],
[1849, 43, 6*w^3 - 9*w^2 - 21*w + 11],
[1849, 43, -2*w^3 + w^2 + 9*w - 5],
[1861, 1861, 2*w^3 - 3*w^2 - 11*w + 2],
[1871, 1871, 5*w - 1],
[1871, 1871, 3*w^3 - 6*w^2 - 14*w + 13],
[1873, 1873, 2*w^3 - 11*w - 2],
[1877, 1877, w^2 - 5*w + 8],
[1877, 1877, 3*w^3 - 2*w^2 - 6*w + 7],
[1889, 1889, 2*w^3 - w^2 - 9*w + 4],
[1901, 1901, -w^3 - w^2 + 7*w - 1],
[1901, 1901, -3*w^3 + 3*w^2 + 12*w - 8],
[1901, 1901, -2*w^3 + 6*w^2 + 5*w - 13],
[1901, 1901, -4*w^3 + 3*w^2 + 15*w - 1],
[1933, 1933, -3*w^3 + 2*w^2 + 10*w + 2],
[1949, 1949, 3*w^3 - 3*w^2 - 15*w - 5],
[1949, 1949, -w^3 + 5*w^2 + 2*w - 8],
[1973, 1973, -w^3 + w^2 + 5*w - 8],
[1979, 1979, -2*w^3 + 5*w^2 + 3*w - 11],
[1987, 1987, -w^3 + w^2 - 3*w - 1],
[1993, 1993, -2*w^3 + 6*w^2 + 2*w - 13],
[1997, 1997, -4*w^3 + 8*w^2 + 10*w - 7],
[1997, 1997, w^3 - w - 5],
[1999, 1999, -w^3 + 2*w^2 - w - 11],
[1999, 1999, w^2 - 10]];
primes := [ideal<ZF | {F!x : x in I}> : I in primesArray];

heckePol := x;
K := Rationals(); e := 1;

heckeEigenvaluesArray := [0, -1, 2, -1, 3, 4, 8, 4, 0, 10, -2, 6, 6, -4, 2, -10, 0, -8, 8, 2, 8, -10, 0, 18, 12, -12, 4, -18, 18, -20, -8, 22, -8, 6, 2, 10, -20, -10, -20, 16, -10, -18, 4, 2, -12, 10, 12, 12, -12, 30, 22, -22, 0, -32, 20, -24, 12, -22, 12, 12, 12, -4, -14, -12, 18, 22, 8, 4, -26, 22, 2, -2, -20, 22, 18, -10, -16, 2, 28, 12, 26, -8, -22, -18, -8, 14, -10, 4, -4, -14, -4, -26, -12, -12, 24, 8, -24, 8, 8, -2, -28, 2, -8, -16, -14, -38, 46, -28, 38, -4, 28, 18, 12, 8, 40, -2, -38, -28, -4, -36, -2, 12, -36, -44, 12, 46, -40, 34, 26, 24, -12, -46, 26, 22, -30, -6, 16, -16, 48, 10, 26, -10, 0, -34, -44, -14, -20, -26, 12, -6, 6, -6, -42, 2, -26, -14, -22, -14, -6, 2, 48, -40, -22, 52, 18, -14, -34, -30, 18, -8, 30, 50, 60, -62, 16, 46, -16, 28, 6, 4, 2, 18, -34, 44, 44, -64, 0, -16, -46, 12, 42, -26, -18, 8, 50, 32, -14, -54, -30, 22, -18, 20, 30, -44, -62, 8, 2, 42, -54, -46, 18, 2, -12, 70, 30, 46, -10, 20, -10, -20, 48, 52, -32, -40, -52, 50, -30, -10, -36, 42, -52, -34, -24, 8, -44, 34, 22, 2, 36, 66, -40, -10, -12, 66, -38, 74, 26, 4, 6, 20, 28, -30, -38, -34, 8, -54, -46, -24, -64, 46, 62, 74, 22, 34, -46, 36, -12, -36, 28, -30, -16, -46, -26, 48, -84, 24, -26, 48, 20, 52, 12, -6, -70, 76, 70, -46, 2, 16, 28, -8, -46, 6, 8, 40];
heckeEigenvalues := AssociativeArray();
for i := 1 to #heckeEigenvaluesArray do
  heckeEigenvalues[primes[i]] := heckeEigenvaluesArray[i];
end for;

ALEigenvalues := AssociativeArray();
ALEigenvalues[ideal<ZF | {5, 5, -w^3 + w^2 + 4*w + 1}>] := 1;
ALEigenvalues[ideal<ZF | {7, 7, -w^2 + w + 2}>] := 1;

// EXAMPLE:
// pp := Factorization(2*ZF)[1][1];
// heckeEigenvalues[pp];

print "To reconstruct the Hilbert newform f, type
  f, iso := Explode(make_newform());";

function make_newform();
 M := HilbertCuspForms(F, NN);
 S := NewSubspace(M);
 // SetVerbose("ModFrmHil", 1);
 NFD := NewformDecomposition(S);
 newforms := [* Eigenform(U) : U in NFD *];

 if #newforms eq 0 then;
  print "No Hilbert newforms at this level";
  return 0;
 end if;

 print "Testing ", #newforms, " possible newforms";
 newforms := [* f: f in newforms | IsIsomorphic(BaseField(f), K) *];
 print #newforms, " newforms have the correct Hecke field";

 if #newforms eq 0 then;
  print "No Hilbert newform found with the correct Hecke field";
  return 0;
 end if;

 autos := Automorphisms(K);
 xnewforms := [* *];
 for f in newforms do;
  if K eq RationalField() then;
   Append(~xnewforms, [* f, autos[1] *]);
  else;
   flag, iso := IsIsomorphic(K,BaseField(f));
   for a in autos do;
    Append(~xnewforms, [* f, a*iso *]);
   end for;
  end if;
 end for;
 newforms := xnewforms;

 for P in primes do;
  xnewforms := [* *];
  for f_iso in newforms do;
   f, iso := Explode(f_iso);
   if HeckeEigenvalue(f,P) eq iso(heckeEigenvalues[P]) then;
    Append(~xnewforms, f_iso);
   end if;
  end for;
  newforms := xnewforms;
  if #newforms eq 0 then;
   print "No Hilbert newform found which matches the Hecke eigenvalues";
   return 0;
  else if #newforms eq 1 then;
   print "success: unique match";
   return newforms[1];
  end if;
  end if;
 end for;
 print #newforms, "Hilbert newforms found which match the Hecke eigenvalues";
 return newforms[1];

end function;