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Properties

Label 20.14.1807948901...9712.1
Degree $20$
Signature $[14, 3]$
Discriminant $-\,2^{10}\cdot 11^{16}\cdot 727^{3}$
Root discriminant $25.87$
Ramified primes $2, 11, 727$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group 20T747

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-43, -102, 548, 2077, 1146, -3144, -3354, 1787, 2972, -422, -1656, -500, 532, 628, -34, -282, -9, 63, -3, -6, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - 6*x^19 - 3*x^18 + 63*x^17 - 9*x^16 - 282*x^15 - 34*x^14 + 628*x^13 + 532*x^12 - 500*x^11 - 1656*x^10 - 422*x^9 + 2972*x^8 + 1787*x^7 - 3354*x^6 - 3144*x^5 + 1146*x^4 + 2077*x^3 + 548*x^2 - 102*x - 43)
 
gp: K = bnfinit(x^20 - 6*x^19 - 3*x^18 + 63*x^17 - 9*x^16 - 282*x^15 - 34*x^14 + 628*x^13 + 532*x^12 - 500*x^11 - 1656*x^10 - 422*x^9 + 2972*x^8 + 1787*x^7 - 3354*x^6 - 3144*x^5 + 1146*x^4 + 2077*x^3 + 548*x^2 - 102*x - 43, 1)
 

Normalized defining polynomial

\( x^{20} - 6 x^{19} - 3 x^{18} + 63 x^{17} - 9 x^{16} - 282 x^{15} - 34 x^{14} + 628 x^{13} + 532 x^{12} - 500 x^{11} - 1656 x^{10} - 422 x^{9} + 2972 x^{8} + 1787 x^{7} - 3354 x^{6} - 3144 x^{5} + 1146 x^{4} + 2077 x^{3} + 548 x^{2} - 102 x - 43 \)

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

Invariants

Degree:  $20$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[14, 3]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(-18079489015266793067734899712=-\,2^{10}\cdot 11^{16}\cdot 727^{3}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $25.87$
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:  $2, 11, 727$
magma: PrimeDivisors(Discriminant(Integers(K)));
 
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
This field is not Galois over $\Q$.
This is not a CM field.

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $a^{15}$, $a^{16}$, $a^{17}$, $a^{18}$, $\frac{1}{24452299838288515489} a^{19} - \frac{7095916344739383629}{24452299838288515489} a^{18} - \frac{7182053373876880925}{24452299838288515489} a^{17} + \frac{8121062142118909914}{24452299838288515489} a^{16} + \frac{33034436033938066}{364959699078933067} a^{15} + \frac{3053623759114732519}{24452299838288515489} a^{14} + \frac{4557238209044326468}{24452299838288515489} a^{13} + \frac{11174847978843764}{364959699078933067} a^{12} + \frac{3700720792859298367}{24452299838288515489} a^{11} + \frac{7593692705533834124}{24452299838288515489} a^{10} - \frac{215823232142524026}{568658135774151523} a^{9} + \frac{6806918850818350799}{24452299838288515489} a^{8} - \frac{9011754774600537068}{24452299838288515489} a^{7} + \frac{3918192305801314802}{24452299838288515489} a^{6} + \frac{8467251243464218311}{24452299838288515489} a^{5} + \frac{10755878582614243682}{24452299838288515489} a^{4} - \frac{10592510271236852251}{24452299838288515489} a^{3} + \frac{3005781179799059965}{24452299838288515489} a^{2} - \frac{496275784883889015}{24452299838288515489} a - \frac{222933462982883086}{568658135774151523}$

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:  $16$
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:  \( 10853950.9209 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

20T747:

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 81920
The 332 conjugacy class representatives for t20n747 are not computed
Character table for t20n747 is not computed

Intermediate fields

\(\Q(\zeta_{11})^+\), 10.8.155838906487.1

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

Sibling fields

Degree 20 siblings: data not computed

Frobenius cycle types

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59
Cycle type R $20$ $20$ ${\href{/LocalNumberField/7.5.0.1}{5} }^{4}$ R ${\href{/LocalNumberField/13.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/17.10.0.1}{10} }^{2}$ $20$ ${\href{/LocalNumberField/23.4.0.1}{4} }{,}\,{\href{/LocalNumberField/23.2.0.1}{2} }^{7}{,}\,{\href{/LocalNumberField/23.1.0.1}{1} }^{2}$ $20$ $20$ $20$ $20$ ${\href{/LocalNumberField/43.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/43.2.0.1}{2} }^{2}{,}\,{\href{/LocalNumberField/43.1.0.1}{1} }^{8}$ ${\href{/LocalNumberField/47.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/53.5.0.1}{5} }^{4}$ $20$

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
$2$2.10.0.1$x^{10} - x^{3} + 1$$1$$10$$0$$C_{10}$$[\ ]^{10}$
2.10.10.6$x^{10} - 5 x^{8} - 18 x^{6} - 46 x^{4} + 49 x^{2} - 13$$2$$5$$10$$C_2 \times (C_2^4 : C_5)$$[2, 2, 2, 2]^{10}$
11Data not computed
727Data not computed