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Properties

Label 20.4.57722337794...4089.8
Degree $20$
Signature $[4, 8]$
Discriminant $11^{16}\cdot 23^{4}\cdot 67^{2}$
Root discriminant $19.41$
Ramified primes $11, 23, 67$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group 20T341

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![121, -121, -363, 242, 605, -264, -561, 143, 132, 418, -232, -361, 237, 124, -91, -38, 38, 1, -7, -1, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - x^19 - 7*x^18 + x^17 + 38*x^16 - 38*x^15 - 91*x^14 + 124*x^13 + 237*x^12 - 361*x^11 - 232*x^10 + 418*x^9 + 132*x^8 + 143*x^7 - 561*x^6 - 264*x^5 + 605*x^4 + 242*x^3 - 363*x^2 - 121*x + 121)
 
gp: K = bnfinit(x^20 - x^19 - 7*x^18 + x^17 + 38*x^16 - 38*x^15 - 91*x^14 + 124*x^13 + 237*x^12 - 361*x^11 - 232*x^10 + 418*x^9 + 132*x^8 + 143*x^7 - 561*x^6 - 264*x^5 + 605*x^4 + 242*x^3 - 363*x^2 - 121*x + 121, 1)
 

Normalized defining polynomial

\( x^{20} - x^{19} - 7 x^{18} + x^{17} + 38 x^{16} - 38 x^{15} - 91 x^{14} + 124 x^{13} + 237 x^{12} - 361 x^{11} - 232 x^{10} + 418 x^{9} + 132 x^{8} + 143 x^{7} - 561 x^{6} - 264 x^{5} + 605 x^{4} + 242 x^{3} - 363 x^{2} - 121 x + 121 \)

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

Invariants

Degree:  $20$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[4, 8]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(57722337794481266110634089=11^{16}\cdot 23^{4}\cdot 67^{2}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $19.41$
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:  $11, 23, 67$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $\frac{1}{11} a^{15} - \frac{1}{11} a^{14} + \frac{4}{11} a^{13} + \frac{1}{11} a^{12} + \frac{5}{11} a^{11} - \frac{5}{11} a^{10} - \frac{3}{11} a^{9} + \frac{3}{11} a^{8} - \frac{5}{11} a^{7} + \frac{2}{11} a^{6} - \frac{1}{11} a^{5}$, $\frac{1}{11} a^{16} + \frac{3}{11} a^{14} + \frac{5}{11} a^{13} - \frac{5}{11} a^{12} + \frac{3}{11} a^{10} - \frac{2}{11} a^{8} - \frac{3}{11} a^{7} + \frac{1}{11} a^{6} - \frac{1}{11} a^{5}$, $\frac{1}{11} a^{17} - \frac{3}{11} a^{14} + \frac{5}{11} a^{13} - \frac{3}{11} a^{12} - \frac{1}{11} a^{11} + \frac{4}{11} a^{10} - \frac{4}{11} a^{9} - \frac{1}{11} a^{8} + \frac{5}{11} a^{7} + \frac{4}{11} a^{6} + \frac{3}{11} a^{5}$, $\frac{1}{11} a^{18} + \frac{2}{11} a^{14} - \frac{2}{11} a^{13} + \frac{2}{11} a^{12} - \frac{3}{11} a^{11} + \frac{3}{11} a^{10} + \frac{1}{11} a^{9} + \frac{3}{11} a^{8} - \frac{2}{11} a^{6} - \frac{3}{11} a^{5}$, $\frac{1}{10846796239635426329034941} a^{19} - \frac{128645007115051174830582}{10846796239635426329034941} a^{18} + \frac{401286275794320072683488}{10846796239635426329034941} a^{17} + \frac{206564056444119457642892}{10846796239635426329034941} a^{16} + \frac{94321792132627491035376}{10846796239635426329034941} a^{15} - \frac{1851554089563154917848179}{10846796239635426329034941} a^{14} - \frac{326993782241458358189305}{10846796239635426329034941} a^{13} - \frac{4794828902857148921839489}{10846796239635426329034941} a^{12} + \frac{2690912631912745283452218}{10846796239635426329034941} a^{11} - \frac{3847246901906427183484222}{10846796239635426329034941} a^{10} - \frac{4064439923754495241183065}{10846796239635426329034941} a^{9} + \frac{2392250603718413737328281}{10846796239635426329034941} a^{8} - \frac{3898912335747504430639968}{10846796239635426329034941} a^{7} - \frac{4812889225928643611799103}{10846796239635426329034941} a^{6} + \frac{303936688471609130847628}{10846796239635426329034941} a^{5} + \frac{245968312255797898276230}{986072385421402393548631} a^{4} + \frac{321640656200079517911032}{986072385421402393548631} a^{3} - \frac{472327098654762192156439}{986072385421402393548631} a^{2} - \frac{29883819630358429858879}{986072385421402393548631} a + \frac{40965018533856051121743}{986072385421402393548631}$

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:  $11$
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:  \( 74181.5040654 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

20T341:

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 5120
The 224 conjugacy class representatives for t20n341 are not computed
Character table for t20n341 is not computed

Intermediate fields

\(\Q(\zeta_{11})^+\), 10.2.330327035621.1, 10.8.7597521819283.4, 10.4.4930254263.1

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 ${\href{/LocalNumberField/2.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/3.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/5.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/7.10.0.1}{10} }^{2}$ R ${\href{/LocalNumberField/13.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/17.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/19.10.0.1}{10} }^{2}$ R ${\href{/LocalNumberField/29.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/31.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/37.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/41.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/43.2.0.1}{2} }^{8}{,}\,{\href{/LocalNumberField/43.1.0.1}{1} }^{4}$ ${\href{/LocalNumberField/47.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/53.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/59.5.0.1}{5} }^{4}$

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
$11$11.10.8.5$x^{10} - 2321 x^{5} + 2033647$$5$$2$$8$$C_{10}$$[\ ]_{5}^{2}$
11.10.8.5$x^{10} - 2321 x^{5} + 2033647$$5$$2$$8$$C_{10}$$[\ ]_{5}^{2}$
$23$23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.1.1$x^{2} - 23$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.1.1$x^{2} - 23$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.1$x^{2} - 23$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.0.1$x^{2} - x + 7$$1$$2$$0$$C_2$$[\ ]^{2}$
23.2.1.1$x^{2} - 23$$2$$1$$1$$C_2$$[\ ]_{2}$
$67$$\Q_{67}$$x + 4$$1$$1$$0$Trivial$[\ ]$
$\Q_{67}$$x + 4$$1$$1$$0$Trivial$[\ ]$
$\Q_{67}$$x + 4$$1$$1$$0$Trivial$[\ ]$
$\Q_{67}$$x + 4$$1$$1$$0$Trivial$[\ ]$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.2.0.1$x^{2} - x + 12$$1$$2$$0$$C_2$$[\ ]^{2}$
67.4.2.1$x^{4} + 1541 x^{2} + 646416$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$