Properties

Label 36.36.7996222336...8784.1
Degree $36$
Signature $[36, 0]$
Discriminant $2^{36}\cdot 3^{18}\cdot 19^{34}$
Root discriminant $55.89$
Ramified primes $2, 3, 19$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group $C_2\times C_{18}$ (as 36T2)

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![1, 0, -120, 0, 3570, 0, -41769, 0, 256105, 0, -949739, 0, 2318239, 0, -3932287, 0, 4805781, 0, -4334718, 0, 2929464, 0, -1494747, 0, 576201, 0, -166634, 0, 35554, 0, -5426, 0, 560, 0, -35, 0, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^36 - 35*x^34 + 560*x^32 - 5426*x^30 + 35554*x^28 - 166634*x^26 + 576201*x^24 - 1494747*x^22 + 2929464*x^20 - 4334718*x^18 + 4805781*x^16 - 3932287*x^14 + 2318239*x^12 - 949739*x^10 + 256105*x^8 - 41769*x^6 + 3570*x^4 - 120*x^2 + 1)
 
gp: K = bnfinit(x^36 - 35*x^34 + 560*x^32 - 5426*x^30 + 35554*x^28 - 166634*x^26 + 576201*x^24 - 1494747*x^22 + 2929464*x^20 - 4334718*x^18 + 4805781*x^16 - 3932287*x^14 + 2318239*x^12 - 949739*x^10 + 256105*x^8 - 41769*x^6 + 3570*x^4 - 120*x^2 + 1, 1)
 

Normalized defining polynomial

\( x^{36} - 35 x^{34} + 560 x^{32} - 5426 x^{30} + 35554 x^{28} - 166634 x^{26} + 576201 x^{24} - 1494747 x^{22} + 2929464 x^{20} - 4334718 x^{18} + 4805781 x^{16} - 3932287 x^{14} + 2318239 x^{12} - 949739 x^{10} + 256105 x^{8} - 41769 x^{6} + 3570 x^{4} - 120 x^{2} + 1 \)

magma: DefiningPolynomial(K);
 
sage: K.defining_polynomial()
 
gp: K.pol
 

Invariants

Degree:  $36$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[36, 0]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(799622233646074762983150698451178476894456963777140963130998784=2^{36}\cdot 3^{18}\cdot 19^{34}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $55.89$
magma: Abs(Discriminant(Integers(K)))^(1/Degree(K));
 
sage: (K.disc().abs())^(1./K.degree())
 
gp: abs(K.disc)^(1/poldegree(K.pol))
 
Ramified primes:  $2, 3, 19$
magma: PrimeDivisors(Discriminant(Integers(K)));
 
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
This field is Galois and abelian over $\Q$.
Conductor:  \(228=2^{2}\cdot 3\cdot 19\)
Dirichlet character group:    $\lbrace$$\chi_{228}(1,·)$, $\chi_{228}(131,·)$, $\chi_{228}(11,·)$, $\chi_{228}(23,·)$, $\chi_{228}(25,·)$, $\chi_{228}(29,·)$, $\chi_{228}(31,·)$, $\chi_{228}(35,·)$, $\chi_{228}(41,·)$, $\chi_{228}(173,·)$, $\chi_{228}(47,·)$, $\chi_{228}(49,·)$, $\chi_{228}(53,·)$, $\chi_{228}(185,·)$, $\chi_{228}(151,·)$, $\chi_{228}(61,·)$, $\chi_{228}(191,·)$, $\chi_{228}(65,·)$, $\chi_{228}(67,·)$, $\chi_{228}(73,·)$, $\chi_{228}(119,·)$, $\chi_{228}(79,·)$, $\chi_{228}(83,·)$, $\chi_{228}(85,·)$, $\chi_{228}(215,·)$, $\chi_{228}(89,·)$, $\chi_{228}(91,·)$, $\chi_{228}(221,·)$, $\chi_{228}(223,·)$, $\chi_{228}(103,·)$, $\chi_{228}(157,·)$, $\chi_{228}(113,·)$, $\chi_{228}(211,·)$, $\chi_{228}(169,·)$, $\chi_{228}(121,·)$, $\chi_{228}(127,·)$$\rbrace$
This is not a CM field.

Integral basis (with respect to field generator \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $a^{15}$, $a^{16}$, $a^{17}$, $a^{18}$, $a^{19}$, $a^{20}$, $a^{21}$, $a^{22}$, $a^{23}$, $a^{24}$, $a^{25}$, $a^{26}$, $a^{27}$, $a^{28}$, $a^{29}$, $a^{30}$, $a^{31}$, $a^{32}$, $a^{33}$, $a^{34}$, $a^{35}$

magma: IntegralBasis(K);
 
sage: K.integral_basis()
 
gp: K.zk
 

Class group and class number

Trivial group, which has order $1$ (assuming GRH)

magma: ClassGroup(K);
 
sage: K.class_group().invariants()
 
gp: K.clgp
 

Unit group

magma: UK, f := UnitGroup(K);
 
sage: UK = K.unit_group()
 
Rank:  $35$
magma: UnitRank(K);
 
sage: UK.rank()
 
gp: K.fu
 
Torsion generator:  \( -1 \) (order $2$)
magma: K!f(TU.1) where TU,f is TorsionUnitGroup(K);
 
sage: UK.torsion_generator()
 
gp: K.tu[2]
 
Fundamental units:  Units are too long to display, but can be downloaded with other data for this field from 'Stored data to gp' link to the right (assuming GRH)
magma: [K!f(g): g in Generators(UK)];
 
sage: UK.fundamental_units()
 
gp: K.fu
 
Regulator:  \( 104443369202940970000 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

$C_2\times C_{18}$ (as 36T2):

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
An abelian group of order 36
The 36 conjugacy class representatives for $C_2\times C_{18}$
Character table for $C_2\times C_{18}$ is not computed

Intermediate fields

\(\Q(\sqrt{3}) \), \(\Q(\sqrt{19}) \), \(\Q(\sqrt{57}) \), 3.3.361.1, \(\Q(\sqrt{3}, \sqrt{19})\), 6.6.225194688.1, 6.6.158470336.1, 6.6.66854673.1, \(\Q(\zeta_{19})^+\), 12.12.18307265748733661184.1, 18.18.1488294338429317924379721203712.1, \(\Q(\zeta_{76})^+\), \(\Q(\zeta_{57})^+\)

Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.

Frobenius cycle types

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59
Cycle type R R $18^{2}$ ${\href{/LocalNumberField/7.6.0.1}{6} }^{6}$ ${\href{/LocalNumberField/11.6.0.1}{6} }^{6}$ $18^{2}$ $18^{2}$ R $18^{2}$ $18^{2}$ ${\href{/LocalNumberField/31.6.0.1}{6} }^{6}$ ${\href{/LocalNumberField/37.2.0.1}{2} }^{18}$ $18^{2}$ $18^{2}$ $18^{2}$ $18^{2}$ ${\href{/LocalNumberField/59.9.0.1}{9} }^{4}$

In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.

magma: p := 7; // to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
magma: idealfactors := Factorization(p*Integers(K)); // get the data
 
magma: [<primefactor[2], Valuation(Norm(primefactor[1]), p)> : primefactor in idealfactors];
 
sage: p = 7; # to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
sage: [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
 
gp: p = 7; \\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
gp: idealfactors = idealprimedec(K, p); \\ get the data
 
gp: vector(length(idealfactors), j, [idealfactors[j][3], idealfactors[j][4]])
 

Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
2Data not computed
3Data not computed
19Data not computed