/* 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 := PolynomialRing(Rationals()); g := P![-1, -6, -1, 1]; F := NumberField(g); ZF := Integers(F); NN := ideal; primesArray := [ [3, 3, w + 1], [7, 7, w - 1], [8, 2, 2], [9, 3, -w^2 + 2*w + 4], [11, 11, -w^2 + 2*w + 2], [13, 13, -w^2 + w + 4], [19, 19, w + 3], [19, 19, -w^2 + 2*w + 5], [19, 19, -w^2 + 3*w + 2], [23, 23, w^2 - w - 3], [23, 23, -w^2 + 2], [23, 23, -w + 4], [31, 31, w^2 - 5], [43, 43, w^2 - 3*w - 3], [49, 7, w^2 - 6], [53, 53, 2*w - 5], [61, 61, 2*w^2 - 2*w - 9], [71, 71, 2*w - 3], [73, 73, 2*w^2 - 5*w - 5], [83, 83, w^2 - w - 9], [97, 97, 2*w^2 - 3*w - 7], [103, 103, w^2 - 3*w - 6], [109, 109, w^2 - 4*w - 3], [121, 11, 2*w^2 - w - 7], [125, 5, -5], [127, 127, w^2 + w - 5], [131, 131, w^2 - 11], [137, 137, 3*w^2 - 7*w - 8], [137, 137, 2*w^2 - 5*w - 6], [137, 137, -w^2 + w - 2], [139, 139, 3*w^2 - 2*w - 16], [139, 139, 3*w - 2], [139, 139, -w^2 + 3*w - 3], [151, 151, w^2 + w - 11], [157, 157, 2*w^2 - 3*w - 3], [163, 163, w^2 - w - 10], [169, 13, 2*w^2 - 3*w - 4], [173, 173, -3*w^2 + 6*w + 8], [191, 191, -4*w^2 + 7*w + 15], [193, 193, 2*w^2 - 3], [197, 197, w^2 - 3*w - 11], [199, 199, 3*w^2 - 5*w - 16], [211, 211, w^2 - 4*w - 9], [223, 223, 2*w^2 - w - 4], [227, 227, 3*w - 4], [229, 229, w^2 + w - 8], [241, 241, w^2 - 4*w - 6], [251, 251, w - 7], [257, 257, w^2 - 4*w - 7], [263, 263, 3*w^2 - 5*w - 10], [263, 263, 2*w^2 - 5*w - 15], [263, 263, -w^2 + 6*w - 1], [269, 269, -w^2 - w + 14], [277, 277, 2*w^2 - 5*w - 8], [277, 277, w^2 + 3*w - 3], [277, 277, 3*w^2 - 4*w - 12], [281, 281, -2*w - 7], [293, 293, 3*w^2 - 2*w - 12], [307, 307, 2*w^2 + w - 8], [313, 313, w^2 + 4*w - 2], [317, 317, 3*w^2 - 6*w - 5], [331, 331, 4*w^2 - 4*w - 19], [337, 337, -5*w^2 + 8*w + 21], [347, 347, 3*w^2 - 6*w - 13], [347, 347, 3*w^2 - 5*w - 22], [347, 347, 3*w^2 - 5*w - 9], [349, 349, w^2 - 5*w - 11], [353, 353, -w^2 + 6*w - 7], [359, 359, -4*w^2 + 8*w + 11], [367, 367, 3*w^2 - 4*w - 11], [373, 373, w^2 + 2*w - 6], [379, 379, 5*w^2 - 9*w - 18], [409, 409, -w^2 - 4], [439, 439, 3*w^2 - 6*w - 14], [443, 443, -w^2 - 2*w + 13], [443, 443, 2*w^2 - 15], [443, 443, 3*w^2 - 13], [449, 449, w^2 + 2*w - 7], [449, 449, 2*w^2 - 6*w - 7], [449, 449, 3*w^2 - 3*w - 11], [461, 461, -w^2 - 2*w - 5], [467, 467, 3*w^2 - 5*w - 7], [479, 479, -w^2 + 6*w - 4], [491, 491, 3*w^2 - 5*w - 6], [499, 499, w^2 - 5*w - 8], [509, 509, 3*w^2 - 6*w - 19], [521, 521, 3*w^2 - 2*w - 10], [523, 523, 4*w - 9], [541, 541, 3*w^2 - 3*w - 10], [547, 547, 2*w^2 + w - 20], [547, 547, w^2 - 6*w - 5], [547, 547, 6*w^2 - 11*w - 24], [557, 557, -5*w^2 + 11*w + 11], [563, 563, 3*w^2 - 6*w - 16], [569, 569, 4*w^2 - 5*w - 17], [587, 587, 5*w^2 - 8*w - 20], [593, 593, 5*w - 3], [593, 593, 3*w^2 - w - 17], [593, 593, w - 9], [613, 613, 2*w^2 - w - 19], [613, 613, 3*w^2 - 4*w - 5], [613, 613, 3*w^2 - w - 8], [617, 617, 3*w^2 - 2*w - 9], [617, 617, -w^2 + w - 5], [617, 617, 4*w^2 - 6*w - 15], [619, 619, -w^2 + 3*w - 6], [631, 631, 4*w^2 - 7*w - 21], [641, 641, -w^2 - 3*w + 20], [643, 643, 3*w^2 - 14], [643, 643, w^2 - w - 13], [643, 643, 2*w^2 - 9*w + 2], [647, 647, 2*w^2 - 6*w - 9], [653, 653, 3*w^2 - 5], [659, 659, 6*w^2 - 11*w - 21], [661, 661, w^2 - 6*w - 6], [661, 661, w^2 + 3*w - 6], [661, 661, 5*w^2 - 7*w - 22], [673, 673, w^2 - 6*w - 12], [677, 677, 4*w^2 - 7*w - 22], [677, 677, 3*w^2 - 7*w - 12], [677, 677, -2*w^2 - 3], [683, 683, -2*w - 9], [683, 683, 4*w^2 - 7*w - 12], [683, 683, 3*w^2 - 3*w - 8], [691, 691, 2*w^2 + w - 11], [701, 701, 3*w^2 - 3*w - 5], [709, 709, -w^2 - 2*w - 6], [727, 727, 3*w^2 - w - 6], [727, 727, 3*w^2 - w - 27], [727, 727, 3*w^2 - w - 5], [733, 733, -2*w^2 + 9*w - 5], [739, 739, 3*w^2 - 4*w - 23], [743, 743, 2*w^2 - 7*w - 7], [743, 743, 3*w^2 - w - 20], [743, 743, 3*w^2 - 2*w - 7], [757, 757, -w - 9], [757, 757, 4*w^2 - 2*w - 29], [757, 757, 2*w^2 - 3*w - 18], [761, 761, 3*w^2 - 2*w - 6], [761, 761, 3*w^2 - 2*w - 25], [773, 773, -5*w - 12], [787, 787, -3*w - 10], [809, 809, 4*w^2 - w - 19], [821, 821, 5*w^2 - 10*w - 19], [823, 823, -4*w - 11], [827, 827, -7*w - 5], [827, 827, 2*w^2 - 6*w - 13], [827, 827, -w^2 - 2*w + 18], [839, 839, 6*w^2 - 9*w - 26], [839, 839, 5*w^2 - 12*w - 13], [839, 839, w - 10], [857, 857, -w^2 + 4*w - 8], [859, 859, 3*w^2 - 8*w - 10], [859, 859, 4*w^2 - 9*w - 14], [859, 859, 3*w^2 - 26], [863, 863, 2*w^2 + 3*w - 7], [877, 877, -5*w^2 + 11*w + 9], [877, 877, -5*w^2 + 10*w + 13], [877, 877, -w^2 + w - 6], [881, 881, w^2 - 3*w - 14], [883, 883, -w^2 + 3*w - 7], [887, 887, -3*w^2 + 6*w - 2], [907, 907, w^2 + 3*w - 8], [911, 911, 4*w^2 - 6*w - 29], [937, 937, -6*w^2 + 11*w + 25], [953, 953, 6*w^2 - 6*w - 29], [961, 31, -w^2 + 7*w - 5], [967, 967, 2*w^2 + w - 14], [971, 971, 5*w^2 - 3*w - 27], [971, 971, 4*w - 15], [971, 971, w^2 - 2*w - 14], [977, 977, 3*w^2 - 5*w - 24], [983, 983, w^2 - 4*w - 15], [991, 991, 6*w^2 - 10*w - 23], [991, 991, 5*w^2 - 6*w - 22], [991, 991, 3*w^2 + w - 13]]; primes := [ideal : I in primesArray]; heckePol := x^5 + 2*x^4 - 7*x^3 - 8*x^2 + 8*x - 1; K := NumberField(heckePol); heckeEigenvaluesArray := [e, e^4 + 2*e^3 - 7*e^2 - 9*e + 6, -4/3*e^4 - 10/3*e^3 + 23/3*e^2 + 14*e - 14/3, e^4 + 2*e^3 - 6*e^2 - 8*e + 1, -1, -e^4 - 2*e^3 + 6*e^2 + 7*e - 4, 1/3*e^4 + 4/3*e^3 - 5/3*e^2 - 5*e + 5/3, e^2 + 2*e - 3, -4/3*e^4 - 7/3*e^3 + 26/3*e^2 + 8*e - 29/3, -5/3*e^4 - 11/3*e^3 + 31/3*e^2 + 16*e - 25/3, 2*e^4 + 4*e^3 - 13*e^2 - 18*e + 6, 1/3*e^4 + 4/3*e^3 + 1/3*e^2 - 6*e - 16/3, 4/3*e^4 + 13/3*e^3 - 23/3*e^2 - 21*e + 20/3, e^4 + 3*e^3 - 4*e^2 - 14*e, -7/3*e^4 - 16/3*e^3 + 41/3*e^2 + 19*e - 35/3, -10/3*e^4 - 25/3*e^3 + 59/3*e^2 + 38*e - 41/3, 2*e^4 + 4*e^3 - 13*e^2 - 13*e + 13, 4/3*e^4 + 7/3*e^3 - 32/3*e^2 - 11*e + 20/3, -5*e^4 - 13*e^3 + 29*e^2 + 54*e - 24, -1/3*e^4 + 2/3*e^3 + 8/3*e^2 - 5*e - 2/3, e^4 + e^3 - 9*e^2 - 5*e + 9, 4*e^4 + 9*e^3 - 26*e^2 - 43*e + 17, 2*e^3 + 4*e^2 - 11*e - 15, e^4 + 2*e^3 - 10*e^2 - 11*e + 16, 4/3*e^4 + 7/3*e^3 - 32/3*e^2 - 4*e + 41/3, 2*e^4 + 6*e^3 - 9*e^2 - 29*e + 3, -11/3*e^4 - 29/3*e^3 + 58/3*e^2 + 37*e - 28/3, 11/3*e^4 + 26/3*e^3 - 70/3*e^2 - 35*e + 34/3, -2/3*e^4 - 11/3*e^3 + 7/3*e^2 + 21*e - 16/3, -5/3*e^4 - 11/3*e^3 + 37/3*e^2 + 20*e - 37/3, 20/3*e^4 + 47/3*e^3 - 121/3*e^2 - 64*e + 76/3, e^4 - 7*e^2 + 9*e + 7, 4/3*e^4 + 4/3*e^3 - 26/3*e^2 - 5*e + 8/3, -2*e^4 - 5*e^3 + 14*e^2 + 28*e - 18, 10/3*e^4 + 25/3*e^3 - 59/3*e^2 - 32*e + 26/3, 2*e^4 + 6*e^3 - 9*e^2 - 20*e, -10/3*e^4 - 16/3*e^3 + 74/3*e^2 + 21*e - 56/3, 22/3*e^4 + 55/3*e^3 - 134/3*e^2 - 81*e + 113/3, 11/3*e^4 + 23/3*e^3 - 79/3*e^2 - 33*e + 73/3, -5/3*e^4 - 11/3*e^3 + 43/3*e^2 + 15*e - 64/3, 3*e^4 + 7*e^3 - 15*e^2 - 29*e + 2, -17/3*e^4 - 47/3*e^3 + 94/3*e^2 + 70*e - 70/3, -13/3*e^4 - 37/3*e^3 + 62/3*e^2 + 53*e - 32/3, -5*e^4 - 13*e^3 + 32*e^2 + 63*e - 36, 1/3*e^4 - 5/3*e^3 - 17/3*e^2 + 10*e + 50/3, -7/3*e^4 - 13/3*e^3 + 41/3*e^2 + 13*e - 50/3, 7/3*e^4 + 13/3*e^3 - 44/3*e^2 - 10*e + 23/3, -14/3*e^4 - 35/3*e^3 + 94/3*e^2 + 58*e - 58/3, -1/3*e^4 + 2/3*e^3 + 11/3*e^2 - 9*e + 1/3, -e^4 - 4*e^3 + 2*e^2 + 21*e + 13, -4*e^4 - 11*e^3 + 19*e^2 + 42*e - 5, -11/3*e^4 - 23/3*e^3 + 79/3*e^2 + 33*e - 82/3, 8/3*e^4 + 17/3*e^3 - 64/3*e^2 - 28*e + 88/3, -14/3*e^4 - 32/3*e^3 + 79/3*e^2 + 41*e - 70/3, 5*e^4 + 12*e^3 - 27*e^2 - 41*e + 9, -4*e^4 - 9*e^3 + 22*e^2 + 38*e - 5, -3*e^4 - 6*e^3 + 18*e^2 + 18*e, 14/3*e^4 + 41/3*e^3 - 76/3*e^2 - 56*e + 52/3, 3*e^4 + 10*e^3 - 16*e^2 - 49*e + 15, 2*e^4 + 4*e^3 - 9*e^2 - 8*e - 5, -2/3*e^4 + 4/3*e^3 + 34/3*e^2 - 4*e - 103/3, -e^4 - 4*e^3 + 8*e + 25, -8/3*e^4 - 20/3*e^3 + 49/3*e^2 + 22*e - 16/3, 23/3*e^4 + 59/3*e^3 - 139/3*e^2 - 85*e + 73/3, -7/3*e^4 - 1/3*e^3 + 65/3*e^2 + e - 56/3, -10/3*e^4 - 22/3*e^3 + 80/3*e^2 + 34*e - 89/3, -26/3*e^4 - 53/3*e^3 + 160/3*e^2 + 73*e - 70/3, 28/3*e^4 + 58/3*e^3 - 179/3*e^2 - 84*e + 137/3, 19/3*e^4 + 49/3*e^3 - 110/3*e^2 - 76*e + 65/3, 25/3*e^4 + 55/3*e^3 - 152/3*e^2 - 68*e + 107/3, 13/3*e^4 + 28/3*e^3 - 83/3*e^2 - 32*e + 80/3, -5/3*e^4 - 20/3*e^3 + 34/3*e^2 + 43*e - 43/3, -8/3*e^4 - 14/3*e^3 + 67/3*e^2 + 23*e - 64/3, -26/3*e^4 - 74/3*e^3 + 145/3*e^2 + 110*e - 100/3, 19/3*e^4 + 37/3*e^3 - 134/3*e^2 - 51*e + 143/3, 1/3*e^4 + 1/3*e^3 - 23/3*e^2 - 7*e + 74/3, -e^4 - e^3 + 9*e^2 + 2*e - 25, -17/3*e^4 - 50/3*e^3 + 118/3*e^2 + 89*e - 118/3, -8/3*e^4 - 32/3*e^3 + 40/3*e^2 + 48*e - 64/3, -1/3*e^4 + 2/3*e^3 + 17/3*e^2 - 8*e + 16/3, 8/3*e^4 + 20/3*e^3 - 46/3*e^2 - 23*e - 47/3, -22/3*e^4 - 49/3*e^3 + 143/3*e^2 + 74*e - 83/3, -22/3*e^4 - 46/3*e^3 + 131/3*e^2 + 49*e - 80/3, -4*e^4 - 10*e^3 + 26*e^2 + 52*e - 16, -4/3*e^4 - 10/3*e^3 + 29/3*e^2 + 17*e + 49/3, -32/3*e^4 - 68/3*e^3 + 211/3*e^2 + 98*e - 115/3, 6*e^4 + 17*e^3 - 35*e^2 - 80*e + 20, -22/3*e^4 - 58/3*e^3 + 143/3*e^2 + 98*e - 95/3, 13*e^4 + 29*e^3 - 79*e^2 - 118*e + 53, -6*e^4 - 10*e^3 + 46*e^2 + 40*e - 32, -16/3*e^4 - 40/3*e^3 + 104/3*e^2 + 60*e - 152/3, 5*e^4 + 11*e^3 - 39*e^2 - 53*e + 38, 5/3*e^4 - 10/3*e^3 - 76/3*e^2 + 19*e + 100/3, -4*e^4 - 10*e^3 + 32*e^2 + 52*e - 34, 11*e^4 + 26*e^3 - 71*e^2 - 122*e + 51, -10*e^4 - 19*e^3 + 65*e^2 + 76*e - 55, e^4 + 4*e^3 - 5*e^2 - 20*e - 6, -19/3*e^4 - 46/3*e^3 + 116/3*e^2 + 60*e - 134/3, 5/3*e^4 - 4/3*e^3 - 67/3*e^2 + 12*e + 112/3, 3*e^4 + 9*e^3 - 17*e^2 - 43*e - 3, 11/3*e^4 + 26/3*e^3 - 76/3*e^2 - 34*e + 64/3, 31/3*e^4 + 79/3*e^3 - 182/3*e^2 - 121*e + 113/3, -8/3*e^4 + 1/3*e^3 + 64/3*e^2 - 15*e - 46/3, 8/3*e^4 + 11/3*e^3 - 67/3*e^2 - 13*e + 76/3, 40/3*e^4 + 103/3*e^3 - 248/3*e^2 - 156*e + 194/3, 16/3*e^4 + 40/3*e^3 - 119/3*e^2 - 61*e + 146/3, -10*e^4 - 25*e^3 + 57*e^2 + 103*e - 22, 25/3*e^4 + 61/3*e^3 - 131/3*e^2 - 86*e + 44/3, -13/3*e^4 - 40/3*e^3 + 80/3*e^2 + 67*e - 101/3, 5/3*e^4 + 5/3*e^3 - 64/3*e^2 - 19*e + 118/3, -6*e^4 - 18*e^3 + 34*e^2 + 83*e - 9, 1/3*e^4 - 2/3*e^3 + 1/3*e^2 + 3*e - 58/3, 23/3*e^4 + 47/3*e^3 - 148/3*e^2 - 67*e + 97/3, -e^4 + 3*e^3 + 8*e^2 - 26*e + 6, -11*e^4 - 23*e^3 + 70*e^2 + 90*e - 53, -7*e^4 - 13*e^3 + 51*e^2 + 58*e - 37, 11/3*e^4 + 17/3*e^3 - 85/3*e^2 - 26*e + 34/3, -17/3*e^4 - 35/3*e^3 + 100/3*e^2 + 45*e + 5/3, 35/3*e^4 + 83/3*e^3 - 190/3*e^2 - 110*e + 88/3, -1/3*e^4 + 5/3*e^3 + 17/3*e^2 - 13*e - 86/3, -e^3 - 9*e^2 + 6*e + 32, -37/3*e^4 - 82/3*e^3 + 236/3*e^2 + 116*e - 158/3, 13/3*e^4 + 22/3*e^3 - 95/3*e^2 - 34*e + 65/3, 8/3*e^4 + 5/3*e^3 - 70/3*e^2 + 4*e + 88/3, 7/3*e^4 + 16/3*e^3 - 47/3*e^2 - 21*e + 8/3, -7*e^4 - 11*e^3 + 49*e^2 + 33*e - 41, -5*e^3 - 5*e^2 + 20*e, -5/3*e^4 - 14/3*e^3 - 11/3*e^2 + 8*e + 122/3, -10/3*e^4 - 16/3*e^3 + 74/3*e^2 + 9*e - 131/3, 10*e^4 + 24*e^3 - 67*e^2 - 116*e + 56, 17/3*e^4 + 32/3*e^3 - 97/3*e^2 - 47*e - 14/3, 16/3*e^4 + 31/3*e^3 - 95/3*e^2 - 39*e + 35/3, -4*e^4 - 3*e^3 + 38*e^2 + 6*e - 46, 6*e^4 + 17*e^3 - 31*e^2 - 81*e + 18, 29/3*e^4 + 65/3*e^3 - 196/3*e^2 - 87*e + 196/3, 25/3*e^4 + 58/3*e^3 - 170/3*e^2 - 83*e + 110/3, 4/3*e^4 + 10/3*e^3 - 20/3*e^2 - 26*e + 23/3, 2*e^4 - 22*e^2 + 7*e + 26, -31/3*e^4 - 67/3*e^3 + 185/3*e^2 + 90*e - 68/3, 8/3*e^4 + 17/3*e^3 - 64/3*e^2 - 22*e + 61/3, -6*e^4 - 14*e^3 + 36*e^2 + 64*e - 31, 12*e^4 + 30*e^3 - 80*e^2 - 136*e + 72, -32/3*e^4 - 59/3*e^3 + 220/3*e^2 + 87*e - 130/3, 56/3*e^4 + 140/3*e^3 - 331/3*e^2 - 199*e + 241/3, -13*e^4 - 27*e^3 + 81*e^2 + 102*e - 39, -10/3*e^4 - 16/3*e^3 + 89/3*e^2 + 32*e - 188/3, 16/3*e^4 + 28/3*e^3 - 128/3*e^2 - 44*e + 107/3, 46/3*e^4 + 106/3*e^3 - 278/3*e^2 - 145*e + 200/3, -22/3*e^4 - 52/3*e^3 + 137/3*e^2 + 78*e - 122/3, -14/3*e^4 - 41/3*e^3 + 82/3*e^2 + 61*e - 115/3, -3*e^4 - 4*e^3 + 21*e^2 - 2*e - 42, -8/3*e^4 - 14/3*e^3 + 61/3*e^2 + 32*e - 16/3, -10*e^4 - 23*e^3 + 64*e^2 + 108*e - 39, -8/3*e^4 - 20/3*e^3 + 67/3*e^2 + 26*e - 97/3, -31/3*e^4 - 79/3*e^3 + 188/3*e^2 + 109*e - 140/3, -8/3*e^4 - 17/3*e^3 + 46/3*e^2 + 22*e - 70/3, -2/3*e^4 - 8/3*e^3 + 4/3*e^2 + 17*e + 56/3, -29/3*e^4 - 77/3*e^3 + 154/3*e^2 + 112*e - 133/3, -19*e^4 - 41*e^3 + 117*e^2 + 161*e - 85, -11*e^4 - 22*e^3 + 70*e^2 + 67*e - 62, -22/3*e^4 - 52/3*e^3 + 134/3*e^2 + 85*e - 68/3, -17/3*e^4 - 44/3*e^3 + 127/3*e^2 + 68*e - 166/3, -3*e^4 - 4*e^3 + 19*e^2 + e - 5, 10/3*e^4 + 1/3*e^3 - 86/3*e^2 + 5*e + 101/3, 10*e^4 + 26*e^3 - 52*e^2 - 105*e + 28, 44/3*e^4 + 95/3*e^3 - 274/3*e^2 - 129*e + 190/3, 17*e^4 + 36*e^3 - 100*e^2 - 137*e + 41, -14*e^4 - 35*e^3 + 87*e^2 + 163*e - 78, 31/3*e^4 + 70/3*e^3 - 194/3*e^2 - 95*e + 74/3, 26/3*e^4 + 59/3*e^3 - 145/3*e^2 - 61*e + 49/3, 8/3*e^4 + 32/3*e^3 - 28/3*e^2 - 59*e - 44/3, 11/3*e^4 + 26/3*e^3 - 25/3*e^2 - 22*e - 107/3, 25/3*e^4 + 61/3*e^3 - 143/3*e^2 - 94*e + 41/3, -4/3*e^4 - 19/3*e^3 + 17/3*e^2 + 21*e - 38/3, 1/3*e^4 - 5/3*e^3 - 23/3*e^2 + 24*e + 104/3, 2*e^4 + 10*e^3 - 9*e^2 - 44*e + 13]; heckeEigenvalues := AssociativeArray(); for i := 1 to #heckeEigenvaluesArray do heckeEigenvalues[primes[i]] := heckeEigenvaluesArray[i]; end for; ALEigenvalues := AssociativeArray(); ALEigenvalues[ideal] := 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;