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Properties

Label 20.6.39582054809...4651.2
Degree $20$
Signature $[6, 7]$
Discriminant $-\,11^{17}\cdot 23^{8}$
Root discriminant $26.91$
Ramified primes $11, 23$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group 20T310

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![11, -88, 22, 1639, -6820, 14564, -19822, 17281, -8789, 3927, -4597, 3704, -902, -45, -157, 84, 29, -25, 11, -5, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - 5*x^19 + 11*x^18 - 25*x^17 + 29*x^16 + 84*x^15 - 157*x^14 - 45*x^13 - 902*x^12 + 3704*x^11 - 4597*x^10 + 3927*x^9 - 8789*x^8 + 17281*x^7 - 19822*x^6 + 14564*x^5 - 6820*x^4 + 1639*x^3 + 22*x^2 - 88*x + 11)
 
gp: K = bnfinit(x^20 - 5*x^19 + 11*x^18 - 25*x^17 + 29*x^16 + 84*x^15 - 157*x^14 - 45*x^13 - 902*x^12 + 3704*x^11 - 4597*x^10 + 3927*x^9 - 8789*x^8 + 17281*x^7 - 19822*x^6 + 14564*x^5 - 6820*x^4 + 1639*x^3 + 22*x^2 - 88*x + 11, 1)
 

Normalized defining polynomial

\( x^{20} - 5 x^{19} + 11 x^{18} - 25 x^{17} + 29 x^{16} + 84 x^{15} - 157 x^{14} - 45 x^{13} - 902 x^{12} + 3704 x^{11} - 4597 x^{10} + 3927 x^{9} - 8789 x^{8} + 17281 x^{7} - 19822 x^{6} + 14564 x^{5} - 6820 x^{4} + 1639 x^{3} + 22 x^{2} - 88 x + 11 \)

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

Invariants

Degree:  $20$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[6, 7]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(-39582054809133382019675984651=-\,11^{17}\cdot 23^{8}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $26.91$
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:  $11, 23$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $a^{15}$, $a^{16}$, $a^{17}$, $\frac{1}{197} a^{18} + \frac{63}{197} a^{17} + \frac{18}{197} a^{16} + \frac{62}{197} a^{15} - \frac{48}{197} a^{14} - \frac{40}{197} a^{13} - \frac{97}{197} a^{12} - \frac{56}{197} a^{11} + \frac{5}{197} a^{10} + \frac{64}{197} a^{9} + \frac{40}{197} a^{8} + \frac{51}{197} a^{7} - \frac{86}{197} a^{6} - \frac{41}{197} a^{5} + \frac{68}{197} a^{4} - \frac{91}{197} a^{3} - \frac{70}{197} a^{2} - \frac{34}{197} a + \frac{24}{197}$, $\frac{1}{724866707127173866423271659951} a^{19} + \frac{1706752437880698199547208787}{724866707127173866423271659951} a^{18} - \frac{113029956941764996003779121395}{724866707127173866423271659951} a^{17} + \frac{100325191315069819185806088989}{724866707127173866423271659951} a^{16} - \frac{239048707316623351574319052629}{724866707127173866423271659951} a^{15} + \frac{99596780188882230427030459932}{724866707127173866423271659951} a^{14} + \frac{4384811991387478995275302651}{724866707127173866423271659951} a^{13} + \frac{19380636649204654915840447853}{724866707127173866423271659951} a^{12} + \frac{152954531627999549722237192583}{724866707127173866423271659951} a^{11} + \frac{3710867479173598981999073834}{16857365282027299219145852557} a^{10} + \frac{78270093334025351530034010989}{724866707127173866423271659951} a^{9} + \frac{260045803951383168397063606370}{724866707127173866423271659951} a^{8} - \frac{250806430786695296179538328219}{724866707127173866423271659951} a^{7} - \frac{24577969390285729892702192056}{724866707127173866423271659951} a^{6} - \frac{125050596157411004427360738407}{724866707127173866423271659951} a^{5} - \frac{21464456231077817578151003186}{724866707127173866423271659951} a^{4} + \frac{294906983544222829935716836411}{724866707127173866423271659951} a^{3} - \frac{270267450617314149302155377243}{724866707127173866423271659951} a^{2} + \frac{74315310804823451464176366915}{724866707127173866423271659951} a - \frac{262261451824348972570250041846}{724866707127173866423271659951}$

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:  $12$
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:  \( 3910676.30729 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

20T310:

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 5120
The 44 conjugacy class representatives for t20n310
Character table for t20n310 is not computed

Intermediate fields

\(\Q(\zeta_{11})^+\), 10.6.113395848049.1

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
Degree 40 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 ${\href{/LocalNumberField/2.10.0.1}{10} }{,}\,{\href{/LocalNumberField/2.5.0.1}{5} }^{2}$ ${\href{/LocalNumberField/3.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/5.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/7.10.0.1}{10} }{,}\,{\href{/LocalNumberField/7.5.0.1}{5} }^{2}$ R ${\href{/LocalNumberField/13.10.0.1}{10} }{,}\,{\href{/LocalNumberField/13.5.0.1}{5} }^{2}$ ${\href{/LocalNumberField/17.10.0.1}{10} }{,}\,{\href{/LocalNumberField/17.5.0.1}{5} }^{2}$ ${\href{/LocalNumberField/19.10.0.1}{10} }{,}\,{\href{/LocalNumberField/19.5.0.1}{5} }^{2}$ R ${\href{/LocalNumberField/29.10.0.1}{10} }{,}\,{\href{/LocalNumberField/29.5.0.1}{5} }^{2}$ ${\href{/LocalNumberField/31.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/37.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/41.10.0.1}{10} }{,}\,{\href{/LocalNumberField/41.5.0.1}{5} }^{2}$ ${\href{/LocalNumberField/43.4.0.1}{4} }^{3}{,}\,{\href{/LocalNumberField/43.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/47.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/53.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/59.10.0.1}{10} }^{2}$

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$11.5.4.4$x^{5} - 11$$5$$1$$4$$C_5$$[\ ]_{5}$
11.5.4.4$x^{5} - 11$$5$$1$$4$$C_5$$[\ ]_{5}$
11.10.9.7$x^{10} + 2673$$10$$1$$9$$C_{10}$$[\ ]_{10}$
$23$$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
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}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.4.2.2$x^{4} - 23 x^{2} + 3703$$2$$2$$2$$C_4$$[\ ]_{2}^{2}$
23.4.3.1$x^{4} + 46$$4$$1$$3$$D_{4}$$[\ ]_{4}^{2}$