// Magma code for working with number field 30.30.15010049358097810645468215169836895080663686428828497.1 // Some of these functions may take a long time to execute (this depends on the field). // Define the number field: R := PolynomialRing(Rationals()); K := NumberField(x^30 - x^29 - 52*x^28 + 51*x^27 + 1142*x^26 - 1092*x^25 - 13898*x^24 + 12856*x^23 + 103478*x^22 - 91664*x^21 - 491678*x^20 + 412467*x^19 + 1512708*x^18 - 1191563*x^17 - 3007832*x^16 + 2225799*x^15 + 3819257*x^14 - 2692049*x^13 - 3042474*x^12 + 2079355*x^11 + 1471733*x^10 - 992749*x^9 - 403229*x^8 + 274849*x^7 + 52970*x^6 - 38754*x^5 - 1790*x^4 + 2057*x^3 - 72*x^2 - 24*x + 1); // Defining polynomial: DefiningPolynomial(K); // Degree over Q: Degree(K); // Signature: Signature(K); // Discriminant: OK := Integers(K); Discriminant(OK); // Ramified primes: PrimeDivisors(Discriminant(OK)); // Autmorphisms: Automorphisms(K); // Integral basis: IntegralBasis(K); // Class group: ClassGroup(K); // Unit group: UK, fUK := UnitGroup(K); // Unit rank: UnitRank(K); // Generator for roots of unity: K!f(TU.1) where TU,f is TorsionUnitGroup(K); // Fundamental units: [K|fUK(g): g in Generators(UK)]; // Regulator: Regulator(K); // Analytic class number formula: /* self-contained Magma code snippet to compute the analytic class number formula */ Qx := PolynomialRing(QQ); K := NumberField(x^30 - x^29 - 52*x^28 + 51*x^27 + 1142*x^26 - 1092*x^25 - 13898*x^24 + 12856*x^23 + 103478*x^22 - 91664*x^21 - 491678*x^20 + 412467*x^19 + 1512708*x^18 - 1191563*x^17 - 3007832*x^16 + 2225799*x^15 + 3819257*x^14 - 2692049*x^13 - 3042474*x^12 + 2079355*x^11 + 1471733*x^10 - 992749*x^9 - 403229*x^8 + 274849*x^7 + 52970*x^6 - 38754*x^5 - 1790*x^4 + 2057*x^3 - 72*x^2 - 24*x + 1); OK := Integers(K); DK := Discriminant(OK); UK, fUK := UnitGroup(OK); clK, fclK := ClassGroup(OK); r1,r2 := Signature(K); RK := Regulator(K); RR := Parent(RK); hK := #clK; wK := #TorsionSubgroup(UK); 2^r1 * (2*Pi(RR))^r2 * RK * hK / (wK * Sqrt(RR!Abs(DK))); // Intermediate fields: L := Subfields(K); L[2..#L]; // Galois group: G = GaloisGroup(K); // 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 Magma: p := 7; [ : pr in Factorization(p*Integers(K))];