/* 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![2, 0, -6, -2, 1]; F := NumberField(g); ZF := Integers(F); NN := ideal; primesArray := [ [2, 2, w], [5, 5, -w^3 + 3*w^2 + 2*w - 1], [5, 5, w - 1], [11, 11, w^3 - 2*w^2 - 5*w - 1], [13, 13, -w^3 + 3*w^2 + 3*w - 1], [17, 17, 2*w^3 - 5*w^2 - 9*w + 5], [23, 23, -w^3 + 3*w^2 + 4*w - 5], [25, 5, -w^2 + 3*w + 1], [29, 29, -2*w^3 + 6*w^2 + 5*w - 1], [31, 31, -w^2 + 2*w + 1], [43, 43, -w^3 + 3*w^2 + 2*w - 3], [43, 43, -w^3 + 2*w^2 + 6*w - 3], [59, 59, 2*w^3 - 6*w^2 - 7*w + 7], [73, 73, 3*w^3 - 6*w^2 - 16*w - 5], [79, 79, -5*w^3 + 14*w^2 + 20*w - 17], [81, 3, -3], [83, 83, -w - 3], [83, 83, w^2 - 3*w - 7], [89, 89, w^2 - 2*w - 7], [101, 101, -2*w^3 + 5*w^2 + 8*w - 3], [101, 101, 5*w^3 - 14*w^2 - 19*w + 17], [103, 103, -w^3 + w^2 + 8*w + 3], [103, 103, 2*w^3 - 5*w^2 - 7*w - 1], [109, 109, 3*w^3 - 7*w^2 - 14*w + 1], [109, 109, -w^2 + 4*w + 1], [127, 127, -3*w^3 + 8*w^2 + 11*w - 7], [127, 127, -w^3 + 2*w^2 + 7*w + 1], [137, 137, -2*w^3 + 5*w^2 + 9*w - 1], [139, 139, -w^3 + 3*w^2 + 2*w - 5], [149, 149, w^3 - 3*w^2 - w - 1], [149, 149, -2*w^3 + 4*w^2 + 10*w + 1], [163, 163, w^3 - 4*w^2 - w + 11], [163, 163, 2*w^3 - 4*w^2 - 10*w + 1], [173, 173, -4*w^3 + 11*w^2 + 15*w - 13], [179, 179, 2*w^2 - 6*w - 3], [179, 179, -w^3 + 2*w^2 + 7*w - 1], [181, 181, w^3 - 10*w - 9], [181, 181, -3*w^3 + 8*w^2 + 14*w - 7], [199, 199, w^3 - 8*w - 9], [211, 211, 2*w - 3], [223, 223, -w^3 + 4*w^2 + w - 5], [227, 227, w^3 - 2*w^2 - 5*w - 5], [227, 227, -3*w^3 + 7*w^2 + 14*w - 5], [227, 227, -4*w^3 + 10*w^2 + 19*w - 7], [227, 227, w^2 - 4*w - 5], [239, 239, -2*w^3 + 5*w^2 + 7*w - 3], [251, 251, -w^3 + 4*w^2 + 2*w - 11], [251, 251, 2*w^3 - 6*w^2 - 6*w + 1], [257, 257, -3*w^3 + 6*w^2 + 16*w + 3], [263, 263, -w^3 + 3*w^2 + 3*w - 7], [263, 263, w^3 - 4*w^2 + 7], [269, 269, -2*w^3 + 6*w^2 + 6*w - 11], [269, 269, -w^3 + 4*w^2 - w - 5], [271, 271, -3*w^3 + 9*w^2 + 11*w - 11], [271, 271, w^2 - 5*w - 3], [277, 277, w^3 - 4*w^2 - 2*w + 7], [277, 277, -2*w^3 + 7*w^2 + 8*w - 9], [281, 281, 2*w^2 - 4*w - 5], [281, 281, 2*w^3 - 4*w^2 - 11*w + 1], [283, 283, -3*w^3 + 8*w^2 + 14*w - 11], [293, 293, w^3 - 2*w^2 - 6*w + 5], [307, 307, -2*w^3 + 5*w^2 + 7*w - 1], [313, 313, 2*w^3 - 4*w^2 - 9*w + 3], [313, 313, -2*w^3 + 5*w^2 + 6*w - 3], [317, 317, -2*w^3 + 5*w^2 + 9*w + 1], [347, 347, 4*w^3 - 9*w^2 - 21*w + 3], [347, 347, 4*w^3 - 10*w^2 - 18*w + 5], [349, 349, -2*w^3 + 6*w^2 + 7*w - 3], [353, 353, -w^3 + 12*w + 5], [353, 353, w^2 - w - 7], [359, 359, -2*w^3 + 5*w^2 + 6*w - 7], [359, 359, -w^3 + 4*w^2 - 11], [373, 373, -w^3 + 2*w^2 + 6*w + 5], [379, 379, -3*w^3 + 8*w^2 + 14*w - 5], [397, 397, 6*w^3 - 14*w^2 - 30*w + 7], [401, 401, 3*w^3 - 5*w^2 - 20*w - 7], [409, 409, 3*w^3 - 7*w^2 - 12*w - 3], [409, 409, 2*w^2 - 4*w - 7], [421, 421, w^3 - 11*w - 11], [421, 421, -w^3 + 3*w^2 + w - 7], [431, 431, 2*w^3 - 3*w^2 - 14*w - 3], [431, 431, -4*w^3 + 11*w^2 + 15*w - 15], [433, 433, 2*w^3 - 5*w^2 - 6*w + 1], [439, 439, -4*w^3 + 11*w^2 + 13*w - 9], [439, 439, -2*w^3 + 6*w^2 + 8*w - 11], [443, 443, 2*w - 5], [443, 443, -6*w^3 + 17*w^2 + 24*w - 21], [449, 449, w^3 - 2*w^2 - 8*w + 3], [449, 449, 4*w^3 - 12*w^2 - 15*w + 17], [457, 457, -2*w^3 + 4*w^2 + 9*w + 5], [461, 461, -3*w^3 + 6*w^2 + 15*w - 1], [461, 461, -3*w^3 + 7*w^2 + 17*w + 1], [463, 463, -4*w^3 + 10*w^2 + 17*w - 7], [463, 463, -3*w^3 + 10*w^2 + 9*w - 17], [467, 467, 4*w^3 - 8*w^2 - 21*w - 7], [467, 467, w^3 - 6*w^2 + 3*w + 19], [479, 479, -w^3 + w^2 + 8*w + 1], [487, 487, -4*w^3 + 11*w^2 + 14*w - 15], [487, 487, 3*w^3 - 6*w^2 - 15*w - 5], [491, 491, w^2 - 5], [503, 503, 2*w^3 - 5*w^2 - 11*w + 3], [523, 523, -3*w^3 + 7*w^2 + 13*w + 1], [547, 547, 2*w^3 - 3*w^2 - 12*w - 3], [547, 547, 2*w^3 - 3*w^2 - 12*w - 9], [557, 557, -3*w^3 + 9*w^2 + 9*w - 11], [557, 557, -6*w^3 + 15*w^2 + 27*w - 13], [563, 563, -3*w^3 + 7*w^2 + 14*w - 7], [571, 571, -5*w^3 + 11*w^2 + 26*w - 3], [593, 593, -6*w^3 + 15*w^2 + 26*w - 7], [599, 599, 7*w^3 - 18*w^2 - 29*w + 17], [599, 599, -2*w^3 + 6*w^2 + 8*w - 3], [601, 601, -7*w^3 + 20*w^2 + 28*w - 23], [601, 601, 3*w^3 - 7*w^2 - 12*w + 5], [607, 607, 5*w^3 - 12*w^2 - 24*w + 9], [607, 607, w^3 - 5*w^2 + 15], [613, 613, -w^3 + 5*w^2 - 2*w - 9], [617, 617, w^3 + w^2 - 13*w - 15], [617, 617, 2*w^3 - 4*w^2 - 8*w - 1], [619, 619, 5*w^3 - 10*w^2 - 27*w - 7], [619, 619, 2*w^3 - 4*w^2 - 10*w + 3], [643, 643, w^3 - 5*w^2 + 5*w + 5], [643, 643, 4*w^3 - 9*w^2 - 20*w - 1], [643, 643, 3*w^3 - 7*w^2 - 14*w - 3], [643, 643, -3*w^3 + 7*w^2 + 13*w - 3], [647, 647, -3*w^3 + 8*w^2 + 12*w - 3], [653, 653, -w^3 + 9*w + 13], [653, 653, -w^3 + 4*w^2 + 3*w - 9], [653, 653, -2*w^3 + 7*w^2 + 4*w - 7], [653, 653, w^2 - 4*w - 9], [673, 673, -w^3 + 5*w^2 + w - 13], [683, 683, w^3 - 3*w^2 - 3*w - 3], [701, 701, 5*w^3 - 13*w^2 - 23*w + 9], [709, 709, 2*w^3 - w^2 - 19*w - 15], [719, 719, -5*w^3 + 15*w^2 + 20*w - 19], [727, 727, -w - 5], [751, 751, -4*w^3 + 10*w^2 + 15*w - 9], [751, 751, 6*w^3 - 17*w^2 - 22*w + 21], [757, 757, 3*w^3 - 6*w^2 - 18*w - 1], [757, 757, -w^3 + 4*w^2 + 2*w + 1], [769, 769, w^2 - 2*w + 3], [773, 773, 5*w^3 - 12*w^2 - 23*w + 9], [787, 787, 2*w^3 - 4*w^2 - 5*w + 1], [797, 797, -3*w^3 + 8*w^2 + 10*w - 3], [809, 809, 2*w^2 - 5*w - 1], [809, 809, 4*w^3 - 6*w^2 - 28*w - 11], [827, 827, 4*w^3 - 8*w^2 - 22*w - 1], [827, 827, 2*w^2 - 6*w - 9], [829, 829, -w^3 + w^2 + 10*w + 1], [839, 839, -2*w^3 + 2*w^2 + 16*w + 7], [877, 877, 6*w^3 - 16*w^2 - 25*w + 13], [877, 877, w^3 - w^2 - 7*w + 1], [881, 881, 2*w^3 - 2*w^2 - 15*w - 7], [881, 881, -4*w^3 + 7*w^2 + 26*w + 9], [887, 887, 2*w^3 - 4*w^2 - 13*w - 1], [907, 907, 5*w^3 - 11*w^2 - 26*w - 1], [907, 907, 5*w^3 - 13*w^2 - 22*w + 9], [907, 907, w^3 - 5*w^2 + 2*w + 13], [907, 907, -2*w^3 + 7*w^2 + 5*w - 7], [911, 911, -3*w^3 + 8*w^2 + 9*w - 5], [919, 919, -2*w^3 + 7*w^2 + 6*w - 3], [919, 919, -3*w^3 + 8*w^2 + 15*w - 7], [947, 947, -2*w^3 + 5*w^2 + 12*w - 9], [947, 947, -w^2 + w - 3], [947, 947, 3*w^3 - 6*w^2 - 14*w - 7], [947, 947, -w^3 + 5*w^2 - w - 17], [953, 953, 3*w^3 - 9*w^2 - 9*w + 13], [953, 953, -4*w^3 + 13*w^2 + 11*w - 23], [967, 967, 8*w^3 - 20*w^2 - 33*w + 19]]; primes := [ideal : I in primesArray]; heckePol := x^8 - 30*x^6 + 260*x^4 - 600*x^2 + 400; K := NumberField(heckePol); heckeEigenvaluesArray := [-3/200*e^7 + 2/5*e^5 - 27/10*e^3 + 2*e, e, 1/10*e^6 - 14/5*e^4 + 21*e^2 - 26, -9/100*e^7 + 13/5*e^5 - 101/5*e^3 + 26*e, 1/50*e^7 - 3/5*e^5 + 23/5*e^3 - 3*e, -9/100*e^7 + 13/5*e^5 - 101/5*e^3 + 27*e, -1/10*e^6 + 14/5*e^4 - 20*e^2 + 20, -7/100*e^7 + 2*e^5 - 78/5*e^3 + 23*e, 1/10*e^7 - 14/5*e^5 + 21*e^3 - 27*e, 3/25*e^7 - 17/5*e^5 + 128/5*e^3 - 32*e, -1/5*e^4 + 2*e^2 + 8, 3/100*e^7 - 4/5*e^5 + 27/5*e^3 - 6*e, -1/10*e^6 + 13/5*e^4 - 18*e^2 + 20, -9/100*e^7 + 12/5*e^5 - 81/5*e^3 + 11*e, -1/10*e^6 + 16/5*e^4 - 28*e^2 + 44, 2/5*e^4 - 7*e^2 + 14, 3/10*e^6 - 43/5*e^4 + 66*e^2 - 84, -1/5*e^6 + 27/5*e^4 - 38*e^2 + 40, 2/5*e^4 - 7*e^2 + 22, -1/50*e^7 + 3/5*e^5 - 28/5*e^3 + 17*e, -1/10*e^6 + 16/5*e^4 - 27*e^2 + 30, -9/50*e^7 + 5*e^5 - 182/5*e^3 + 40*e, 8/25*e^7 - 9*e^5 + 338/5*e^3 - 84*e, -e^3 + 13*e, -9/50*e^7 + 5*e^5 - 182/5*e^3 + 41*e, 7/50*e^7 - 19/5*e^5 + 136/5*e^3 - 32*e, 1/10*e^7 - 14/5*e^5 + 20*e^3 - 16*e, -9/100*e^7 + 13/5*e^5 - 96/5*e^3 + 11*e, 1/10*e^6 - 3*e^4 + 26*e^2 - 36, 3/10*e^6 - 44/5*e^4 + 69*e^2 - 90, 3/50*e^7 - 9/5*e^5 + 74/5*e^3 - 27*e, -3/10*e^6 + 43/5*e^4 - 66*e^2 + 84, -17/100*e^7 + 5*e^5 - 203/5*e^3 + 62*e, 1/5*e^6 - 29/5*e^4 + 44*e^2 - 50, 1/100*e^7 - 1/5*e^5 + 9/5*e^3 - 14*e, -3/100*e^7 + 4/5*e^5 - 27/5*e^3 + 2*e, 1/5*e^6 - 29/5*e^4 + 44*e^2 - 42, 2/25*e^7 - 12/5*e^5 + 97/5*e^3 - 27*e, 1/10*e^6 - 2*e^4 + 8*e^2 - 4, 1/10*e^6 - 17/5*e^4 + 30*e^2 - 36, 1/10*e^6 - 14/5*e^4 + 20*e^2 - 20, 2/5*e^6 - 11*e^4 + 82*e^2 - 112, 7/20*e^7 - 10*e^5 + 77*e^3 - 102*e, 31/100*e^7 - 9*e^5 + 349/5*e^3 - 86*e, -3/5*e^4 + 10*e^2 - 24, 7/50*e^7 - 21/5*e^5 + 176/5*e^3 - 64*e, -1/10*e^6 + 11/5*e^4 - 10*e^2 - 4, -21/100*e^7 + 6*e^5 - 229/5*e^3 + 62*e, -11/100*e^7 + 16/5*e^5 - 124/5*e^3 + 31*e, -1/10*e^6 + 14/5*e^4 - 20*e^2 + 12, 16, -1/5*e^6 + 27/5*e^4 - 36*e^2 + 30, -1/5*e^6 + 27/5*e^4 - 36*e^2 + 30, 2/5*e^6 - 56/5*e^4 + 84*e^2 - 104, 17/50*e^7 - 49/5*e^5 + 376/5*e^3 - 92*e, -1/2*e^6 + 14*e^4 - 103*e^2 + 118, -3/5*e^6 + 84/5*e^4 - 124*e^2 + 150, 3/5*e^6 - 88/5*e^4 + 137*e^2 - 162, -1/20*e^7 + 7/5*e^5 - 11*e^3 + 19*e, -1/2*e^6 + 69/5*e^4 - 102*e^2 + 124, -1/2*e^6 + 14*e^4 - 103*e^2 + 134, 19/100*e^7 - 26/5*e^5 + 181/5*e^3 - 26*e, -21/100*e^7 + 29/5*e^5 - 209/5*e^3 + 47*e, -11/100*e^7 + 3*e^5 - 104/5*e^3 + 15*e, 7/50*e^7 - 4*e^5 + 151/5*e^3 - 31*e, 7/100*e^7 - 2*e^5 + 83/5*e^3 - 38*e, -27/100*e^7 + 38/5*e^5 - 293/5*e^3 + 94*e, 1/25*e^7 - 7/5*e^5 + 66/5*e^3 - 19*e, 31/100*e^7 - 9*e^5 + 354/5*e^3 - 101*e, -3/5*e^6 + 87/5*e^4 - 136*e^2 + 178, 7/10*e^6 - 96/5*e^4 + 140*e^2 - 180, -7/10*e^6 + 20*e^4 - 152*e^2 + 196, -1/5*e^6 + 31/5*e^4 - 52*e^2 + 70, -19/100*e^7 + 27/5*e^5 - 201/5*e^3 + 42*e, -11/50*e^7 + 31/5*e^5 - 233/5*e^3 + 53*e, 63/100*e^7 - 89/5*e^5 + 672/5*e^3 - 169*e, 19/100*e^7 - 26/5*e^5 + 186/5*e^3 - 45*e, 2/5*e^6 - 52/5*e^4 + 69*e^2 - 66, 1/10*e^6 - 12/5*e^4 + 17*e^2 - 34, 1/5*e^6 - 24/5*e^4 + 28*e^2 - 26, 3/5*e^7 - 17*e^5 + 128*e^3 - 156*e, 1/10*e^6 - 16/5*e^4 + 28*e^2 - 28, 21/100*e^7 - 31/5*e^5 + 244/5*e^3 - 61*e, -17/25*e^7 + 97/5*e^5 - 742/5*e^3 + 188*e, -3/10*e^6 + 42/5*e^4 - 64*e^2 + 76, -2/5*e^6 + 53/5*e^4 - 74*e^2 + 72, 1/5*e^4 - 2*e^2 - 16, -33/100*e^7 + 48/5*e^5 - 382/5*e^3 + 111*e, 3/5*e^6 - 86/5*e^4 + 133*e^2 - 170, 1/5*e^6 - 33/5*e^4 + 56*e^2 - 54, -21/50*e^7 + 12*e^5 - 458/5*e^3 + 117*e, -11/50*e^7 + 31/5*e^5 - 223/5*e^3 + 33*e, 13/50*e^7 - 37/5*e^5 + 284/5*e^3 - 80*e, 1/10*e^6 - 14/5*e^4 + 20*e^2 - 28, -11/20*e^7 + 78/5*e^5 - 119*e^3 + 158*e, -1/5*e^6 + 27/5*e^4 - 42*e^2 + 72, -1/10*e^7 + 16/5*e^5 - 28*e^3 + 44*e, -8, -11/50*e^7 + 32/5*e^5 - 258/5*e^3 + 88*e, -3/5*e^6 + 17*e^4 - 126*e^2 + 152, -3/25*e^7 + 17/5*e^5 - 118/5*e^3 + 8*e, 1/4*e^7 - 7*e^5 + 51*e^3 - 42*e, -17/100*e^7 + 23/5*e^5 - 163/5*e^3 + 34*e, -2/5*e^6 + 51/5*e^4 - 70*e^2 + 104, -1/2*e^6 + 66/5*e^4 - 91*e^2 + 110, -1/50*e^7 + 4/5*e^5 - 38/5*e^3 + 5*e, -49/100*e^7 + 71/5*e^5 - 551/5*e^3 + 142*e, 51/100*e^7 - 73/5*e^5 + 559/5*e^3 - 134*e, -61/100*e^7 + 87/5*e^5 - 659/5*e^3 + 159*e, -27/50*e^7 + 77/5*e^5 - 586/5*e^3 + 136*e, -3/50*e^7 + 9/5*e^5 - 74/5*e^3 + 28*e, 2/5*e^4 - 7*e^2 + 38, -17/100*e^7 + 23/5*e^5 - 163/5*e^3 + 43*e, 31/50*e^7 - 88/5*e^5 + 668/5*e^3 - 168*e, -1/5*e^6 + 26/5*e^4 - 36*e^2 + 32, -1/2*e^6 + 68/5*e^4 - 99*e^2 + 134, -1/5*e^6 + 26/5*e^4 - 36*e^2 + 42, 1/20*e^7 - 6/5*e^5 + 7*e^3 - 9*e, 9/20*e^7 - 64/5*e^5 + 99*e^3 - 146*e, -9/100*e^7 + 11/5*e^5 - 61/5*e^3 - 6*e, 39/100*e^7 - 54/5*e^5 + 401/5*e^3 - 106*e, 39/100*e^7 - 54/5*e^5 + 401/5*e^3 - 106*e, -41/100*e^7 + 59/5*e^5 - 459/5*e^3 + 134*e, -23/100*e^7 + 32/5*e^5 - 227/5*e^3 + 30*e, 8/25*e^7 - 9*e^5 + 338/5*e^3 - 76*e, -1/2*e^6 + 14*e^4 - 107*e^2 + 142, 1/5*e^6 - 29/5*e^4 + 44*e^2 - 66, -1/10*e^6 + 18/5*e^4 - 35*e^2 + 54, -1/5*e^6 + 28/5*e^4 - 44*e^2 + 46, -3*e^2 + 38, -2/5*e^6 + 57/5*e^4 - 86*e^2 + 104, 37/50*e^7 - 106/5*e^5 + 816/5*e^3 - 215*e, 7/10*e^6 - 98/5*e^4 + 145*e^2 - 186, 1/2*e^6 - 76/5*e^4 + 124*e^2 - 156, 3/5*e^6 - 84/5*e^4 + 124*e^2 - 136, -1/5*e^5 + 4*e^3 - 24*e, -4/5*e^6 + 114/5*e^4 - 176*e^2 + 232, -16/25*e^7 + 91/5*e^5 - 696/5*e^3 + 189*e, 1/10*e^6 - 14/5*e^4 + 21*e^2 - 18, -1/5*e^6 + 6*e^4 - 51*e^2 + 94, 14/25*e^7 - 16*e^5 + 614/5*e^3 - 155*e, 1/100*e^7 - 3/5*e^5 + 49/5*e^3 - 46*e, -1/5*e^7 + 27/5*e^5 - 36*e^3 + 17*e, -31/100*e^7 + 44/5*e^5 - 339/5*e^3 + 99*e, 39/100*e^7 - 56/5*e^5 + 441/5*e^3 - 129*e, -9/20*e^7 + 13*e^5 - 101*e^3 + 134*e, 4/5*e^6 - 109/5*e^4 + 158*e^2 - 168, 9/25*e^7 - 10*e^5 + 374/5*e^3 - 103*e, 1/5*e^7 - 28/5*e^5 + 42*e^3 - 48*e, -27/25*e^7 + 152/5*e^5 - 1142/5*e^3 + 281*e, 1/25*e^7 - 6/5*e^5 + 61/5*e^3 - 55*e, -23/100*e^7 + 33/5*e^5 - 262/5*e^3 + 79*e, 37/100*e^7 - 52/5*e^5 + 388/5*e^3 - 97*e, 7/50*e^7 - 4*e^5 + 146/5*e^3 - 24*e, 13/100*e^7 - 17/5*e^5 + 107/5*e^3 + 2*e, -83/100*e^7 + 118/5*e^5 - 897/5*e^3 + 234*e, 2/5*e^6 - 57/5*e^4 + 90*e^2 - 144, -1/5*e^6 + 31/5*e^4 - 46*e^2 + 16, 4/25*e^7 - 24/5*e^5 + 204/5*e^3 - 76*e, 11/50*e^7 - 31/5*e^5 + 238/5*e^3 - 76*e, -11/25*e^7 + 64/5*e^5 - 506/5*e^3 + 136*e, 1/10*e^6 - 17/5*e^4 + 30*e^2 - 44, 1/10*e^6 - 17/5*e^4 + 30*e^2 - 44, 1/5*e^6 - 29/5*e^4 + 50*e^2 - 112, 4/5*e^6 - 113/5*e^4 + 166*e^2 - 192, -e^6 + 143/5*e^4 - 216*e^2 + 266, 4/5*e^6 - 112/5*e^4 + 165*e^2 - 186, -12/25*e^7 + 14*e^5 - 542/5*e^3 + 124*e]; heckeEigenvalues := AssociativeArray(); for i := 1 to #heckeEigenvaluesArray do heckeEigenvalues[primes[i]] := heckeEigenvaluesArray[i]; end for; ALEigenvalues := AssociativeArray(); // 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;