\\ Pari/GP code for working with number field 18.0.1999004627104432128.1 \\ Some of these functions may take a long time to execute (this depends on the field). \\ Define the number field: K = bnfinit(y^18 - 6*y^17 + 24*y^16 - 68*y^15 + 159*y^14 - 300*y^13 + 479*y^12 - 630*y^11 + 702*y^10 - 636*y^9 + 480*y^8 - 270*y^7 + 114*y^6 - 12*y^5 - 12*y^4 + 14*y^3 - 3*y^2 + 1, 1) \\ Defining polynomial: K.pol \\ Degree over Q: poldegree(K.pol) \\ Signature: K.sign \\ Discriminant: K.disc \\ Ramified primes: factor(abs(K.disc))[,1]~ \\ Integral basis: K.zk \\ Class group: K.clgp \\ Unit rank: K.fu \\ Generator for roots of unity: K.tu[2] \\ Fundamental units: K.fu \\ Regulator: K.reg \\ Analytic class number formula: # self-contained Pari/GP code snippet to compute the analytic class number formula K = bnfinit(x^18 - 6*x^17 + 24*x^16 - 68*x^15 + 159*x^14 - 300*x^13 + 479*x^12 - 630*x^11 + 702*x^10 - 636*x^9 + 480*x^8 - 270*x^7 + 114*x^6 - 12*x^5 - 12*x^4 + 14*x^3 - 3*x^2 + 1, 1); [polcoeff (lfunrootres (lfuncreate (K))[1][1][2], -1), 2^K.r1 * (2*Pi)^K.r2 * K.reg * K.no / (K.tu[1] * sqrt (abs (K.disc)))] \\ Intermediate fields: L = nfsubfields(K); L[2..length(b)] \\ Galois group: polgalois(K.pol) \\ Frobenius cycle types: \\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ for $p=7$ in Pari: p = 7; pfac = idealprimedec(K, p); vector(length(pfac), j, [pfac[j][3], pfac[j][4]])