Properties

Label 20.0.235...877.1
Degree $20$
Signature $(0, 10)$
Discriminant $2.352\times 10^{33}$
Root discriminant \(46.62\)
Ramified primes $11,13$
Class number $61$ (GRH)
Class group [61] (GRH)
Galois group $C_{20}$ (as 20T1)

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Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283)
 
Copy content gp:K = bnfinit(y^20 - y^19 - 9*y^18 + 31*y^17 + 55*y^16 - 48*y^15 + 189*y^14 + 352*y^13 + 1680*y^12 + 4302*y^11 + 4614*y^10 + 17042*y^9 + 24675*y^8 + 19061*y^7 + 33622*y^6 - 55350*y^5 - 15945*y^4 + 101736*y^3 + 82138*y^2 - 16471*y + 40283, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283)
 

\( x^{20} - x^{19} - 9 x^{18} + 31 x^{17} + 55 x^{16} - 48 x^{15} + 189 x^{14} + 352 x^{13} + 1680 x^{12} + \cdots + 40283 \) Copy content Toggle raw display

Copy content comment:Defining polynomial
 
Copy content sage:K.defining_polynomial()
 
Copy content gp:K.pol
 
Copy content magma:DefiningPolynomial(K);
 
Copy content oscar:defining_polynomial(K)
 

Invariants

Degree:  $20$
Copy content comment:Degree over Q
 
Copy content sage:K.degree()
 
Copy content gp:poldegree(K.pol)
 
Copy content magma:Degree(K);
 
Copy content oscar:degree(K)
 
Signature:  $(0, 10)$
Copy content comment:Signature
 
Copy content sage:K.signature()
 
Copy content gp:K.sign
 
Copy content magma:Signature(K);
 
Copy content oscar:signature(K)
 
Discriminant:   \(2351977956823175708448011472615877\) \(\medspace = 11^{16}\cdot 13^{15}\) Copy content Toggle raw display
Copy content comment:Discriminant
 
Copy content sage:K.disc()
 
Copy content gp:K.disc
 
Copy content magma:OK := Integers(K); Discriminant(OK);
 
Copy content oscar:OK = ring_of_integers(K); discriminant(OK)
 
Root discriminant:  \(46.62\)
Copy content comment:Root discriminant
 
Copy content sage:(K.disc().abs())^(1./K.degree())
 
Copy content gp:abs(K.disc)^(1/poldegree(K.pol))
 
Copy content magma:Abs(Discriminant(OK))^(1/Degree(K));
 
Copy content oscar:OK = ring_of_integers(K); (1.0 * abs(discriminant(OK)))^(1/degree(K))
 
Galois root discriminant:  $11^{4/5}13^{3/4}\approx 46.61993485918934$
Ramified primes:   \(11\), \(13\) Copy content Toggle raw display
Copy content comment:Ramified primes
 
Copy content sage:K.disc().support()
 
Copy content gp:factor(abs(K.disc))[,1]~
 
Copy content magma:PrimeDivisors(Discriminant(OK));
 
Copy content oscar:prime_divisors(discriminant(OK))
 
Discriminant root field:  \(\Q(\sqrt{13}) \)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_{20}$
Copy content comment:Automorphisms
 
Copy content sage:K.automorphisms()
 
Copy content magma:Automorphisms(K);
 
Copy content oscar:automorphism_group(K)
 
This field is Galois and abelian over $\Q$.
Conductor:  \(143=11\cdot 13\)
Dirichlet character group:    $\lbrace$$\chi_{143}(64,·)$, $\chi_{143}(1,·)$, $\chi_{143}(5,·)$, $\chi_{143}(70,·)$, $\chi_{143}(135,·)$, $\chi_{143}(12,·)$, $\chi_{143}(14,·)$, $\chi_{143}(86,·)$, $\chi_{143}(25,·)$, $\chi_{143}(27,·)$, $\chi_{143}(92,·)$, $\chi_{143}(31,·)$, $\chi_{143}(34,·)$, $\chi_{143}(38,·)$, $\chi_{143}(103,·)$, $\chi_{143}(47,·)$, $\chi_{143}(53,·)$, $\chi_{143}(122,·)$, $\chi_{143}(60,·)$, $\chi_{143}(125,·)$$\rbrace$
This is a CM field.
Reflex fields:  unavailable$^{512}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $\frac{1}{3}a^{15}+\frac{1}{3}a^{13}+\frac{1}{3}a^{11}-\frac{1}{3}a^{7}-\frac{1}{3}a^{5}-\frac{1}{3}a+\frac{1}{3}$, $\frac{1}{3}a^{16}+\frac{1}{3}a^{14}+\frac{1}{3}a^{12}-\frac{1}{3}a^{8}-\frac{1}{3}a^{6}-\frac{1}{3}a^{2}+\frac{1}{3}a$, $\frac{1}{3}a^{17}-\frac{1}{3}a^{11}-\frac{1}{3}a^{9}+\frac{1}{3}a^{5}-\frac{1}{3}a^{3}+\frac{1}{3}a^{2}+\frac{1}{3}a-\frac{1}{3}$, $\frac{1}{3}a^{18}-\frac{1}{3}a^{12}-\frac{1}{3}a^{10}+\frac{1}{3}a^{6}-\frac{1}{3}a^{4}+\frac{1}{3}a^{3}+\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{10\cdots 33}a^{19}+\frac{13\cdots 47}{33\cdots 11}a^{18}+\frac{10\cdots 46}{10\cdots 33}a^{17}-\frac{68\cdots 46}{33\cdots 11}a^{16}+\frac{51\cdots 30}{33\cdots 11}a^{15}-\frac{14\cdots 29}{33\cdots 11}a^{14}+\frac{31\cdots 05}{10\cdots 33}a^{13}-\frac{61\cdots 01}{33\cdots 11}a^{12}-\frac{44\cdots 87}{10\cdots 33}a^{11}+\frac{14\cdots 52}{33\cdots 11}a^{10}+\frac{17\cdots 82}{10\cdots 33}a^{9}+\frac{11\cdots 09}{33\cdots 11}a^{8}+\frac{19\cdots 25}{10\cdots 33}a^{7}-\frac{71\cdots 10}{33\cdots 11}a^{6}+\frac{12\cdots 80}{33\cdots 11}a^{5}-\frac{33\cdots 78}{10\cdots 33}a^{4}+\frac{15\cdots 50}{33\cdots 11}a^{3}-\frac{15\cdots 39}{33\cdots 11}a^{2}+\frac{21\cdots 38}{10\cdots 33}a-\frac{44\cdots 09}{10\cdots 33}$ Copy content Toggle raw display

Copy content comment:Integral basis
 
Copy content sage:K.integral_basis()
 
Copy content gp:K.zk
 
Copy content magma:IntegralBasis(K);
 
Copy content oscar:basis(OK)
 

Monogenic:  Not computed
Index:  $1$
Inessential primes:  None

Class group and class number

Ideal class group:  $C_{61}$, which has order $61$ (assuming GRH)
Copy content comment:Class group
 
Copy content sage:K.class_group().invariants()
 
Copy content gp:K.clgp
 
Copy content magma:ClassGroup(K);
 
Copy content oscar:class_group(K)
 
Narrow class group:  $C_{61}$, which has order $61$ (assuming GRH)
Copy content comment:Narrow class group
 
Copy content sage:K.narrow_class_group().invariants()
 
Copy content gp:bnfnarrow(K)
 
Copy content magma:NarrowClassGroup(K);
 
Relative class number:   $61$ (assuming GRH)

Unit group

Copy content comment:Unit group
 
Copy content sage:UK = K.unit_group()
 
Copy content magma:UK, fUK := UnitGroup(K);
 
Copy content oscar:UK, fUK = unit_group(OK)
 
Rank:  $9$
Copy content comment:Unit rank
 
Copy content sage:UK.rank()
 
Copy content gp:K.fu
 
Copy content magma:UnitRank(K);
 
Copy content oscar:rank(UK)
 
Torsion generator:   \( -1 \)  (order $2$) Copy content Toggle raw display
Copy content comment:Generator for roots of unity
 
Copy content sage:UK.torsion_generator()
 
Copy content gp:K.tu[2]
 
Copy content magma:K!f(TU.1) where TU,f is TorsionUnitGroup(K);
 
Copy content oscar:torsion_units_generator(OK)
 
Fundamental units:   $\frac{12\cdots 12}{33\cdots 11}a^{19}-\frac{30\cdots 97}{33\cdots 11}a^{18}-\frac{10\cdots 56}{33\cdots 11}a^{17}+\frac{57\cdots 43}{33\cdots 11}a^{16}+\frac{17\cdots 53}{33\cdots 11}a^{15}-\frac{21\cdots 66}{33\cdots 11}a^{14}+\frac{33\cdots 47}{33\cdots 11}a^{13}+\frac{15\cdots 50}{33\cdots 11}a^{12}+\frac{82\cdots 65}{33\cdots 11}a^{11}+\frac{23\cdots 34}{33\cdots 11}a^{10}-\frac{40\cdots 21}{33\cdots 11}a^{9}+\frac{72\cdots 00}{33\cdots 11}a^{8}-\frac{45\cdots 51}{33\cdots 11}a^{7}-\frac{37\cdots 85}{33\cdots 11}a^{6}-\frac{45\cdots 78}{33\cdots 11}a^{5}-\frac{15\cdots 53}{33\cdots 11}a^{4}+\frac{66\cdots 79}{33\cdots 11}a^{3}+\frac{24\cdots 37}{33\cdots 11}a^{2}-\frac{10\cdots 79}{33\cdots 11}a-\frac{10\cdots 06}{33\cdots 11}$, $\frac{38\cdots 12}{33\cdots 11}a^{19}-\frac{34\cdots 76}{33\cdots 11}a^{18}-\frac{33\cdots 65}{33\cdots 11}a^{17}+\frac{11\cdots 04}{33\cdots 11}a^{16}+\frac{20\cdots 15}{33\cdots 11}a^{15}-\frac{12\cdots 45}{33\cdots 11}a^{14}+\frac{89\cdots 25}{33\cdots 11}a^{13}+\frac{15\cdots 17}{33\cdots 11}a^{12}+\frac{70\cdots 69}{33\cdots 11}a^{11}+\frac{18\cdots 05}{33\cdots 11}a^{10}+\frac{23\cdots 56}{33\cdots 11}a^{9}+\frac{81\cdots 47}{33\cdots 11}a^{8}+\frac{12\cdots 63}{33\cdots 11}a^{7}+\frac{12\cdots 21}{33\cdots 11}a^{6}+\frac{23\cdots 54}{33\cdots 11}a^{5}-\frac{12\cdots 51}{33\cdots 11}a^{4}-\frac{25\cdots 31}{33\cdots 11}a^{3}+\frac{23\cdots 17}{33\cdots 11}a^{2}-\frac{11\cdots 41}{33\cdots 11}a-\frac{10\cdots 51}{33\cdots 11}$, $\frac{98\cdots 46}{33\cdots 11}a^{19}-\frac{41\cdots 71}{33\cdots 11}a^{18}-\frac{73\cdots 40}{33\cdots 11}a^{17}+\frac{59\cdots 07}{33\cdots 11}a^{16}-\frac{28\cdots 93}{33\cdots 11}a^{15}-\frac{25\cdots 66}{33\cdots 11}a^{14}+\frac{20\cdots 71}{33\cdots 11}a^{13}-\frac{25\cdots 26}{33\cdots 11}a^{12}+\frac{45\cdots 05}{33\cdots 11}a^{11}-\frac{18\cdots 06}{33\cdots 11}a^{10}-\frac{12\cdots 85}{33\cdots 11}a^{9}-\frac{47\cdots 65}{33\cdots 11}a^{8}-\frac{40\cdots 73}{33\cdots 11}a^{7}-\frac{92\cdots 97}{33\cdots 11}a^{6}-\frac{66\cdots 14}{33\cdots 11}a^{5}-\frac{20\cdots 46}{33\cdots 11}a^{4}+\frac{11\cdots 05}{33\cdots 11}a^{3}+\frac{31\cdots 32}{33\cdots 11}a^{2}-\frac{12\cdots 58}{33\cdots 11}a-\frac{24\cdots 56}{33\cdots 11}$, $\frac{23\cdots 52}{33\cdots 11}a^{19}-\frac{30\cdots 04}{33\cdots 11}a^{18}-\frac{19\cdots 00}{33\cdots 11}a^{17}+\frac{78\cdots 45}{33\cdots 11}a^{16}+\frac{10\cdots 32}{33\cdots 11}a^{15}-\frac{15\cdots 64}{33\cdots 11}a^{14}+\frac{50\cdots 24}{33\cdots 11}a^{13}+\frac{84\cdots 30}{33\cdots 11}a^{12}+\frac{36\cdots 80}{33\cdots 11}a^{11}+\frac{87\cdots 02}{33\cdots 11}a^{10}+\frac{91\cdots 98}{33\cdots 11}a^{9}+\frac{38\cdots 81}{33\cdots 11}a^{8}+\frac{53\cdots 48}{33\cdots 11}a^{7}+\frac{40\cdots 74}{33\cdots 11}a^{6}+\frac{82\cdots 34}{33\cdots 11}a^{5}-\frac{95\cdots 47}{33\cdots 11}a^{4}+\frac{23\cdots 46}{33\cdots 11}a^{3}+\frac{17\cdots 65}{33\cdots 11}a^{2}-\frac{78\cdots 08}{33\cdots 11}a-\frac{21\cdots 82}{33\cdots 11}$, $\frac{74\cdots 10}{57\cdots 03}a^{19}-\frac{11\cdots 67}{57\cdots 03}a^{18}-\frac{90\cdots 45}{57\cdots 03}a^{17}+\frac{10\cdots 95}{19\cdots 01}a^{16}+\frac{19\cdots 84}{19\cdots 01}a^{15}-\frac{59\cdots 57}{19\cdots 01}a^{14}+\frac{83\cdots 16}{57\cdots 03}a^{13}+\frac{73\cdots 67}{57\cdots 03}a^{12}+\frac{27\cdots 44}{19\cdots 01}a^{11}+\frac{10\cdots 61}{57\cdots 03}a^{10}-\frac{78\cdots 31}{57\cdots 03}a^{9}+\frac{14\cdots 21}{19\cdots 01}a^{8}+\frac{16\cdots 14}{57\cdots 03}a^{7}-\frac{76\cdots 42}{57\cdots 03}a^{6}-\frac{17\cdots 38}{57\cdots 03}a^{5}+\frac{39\cdots 67}{19\cdots 01}a^{4}+\frac{69\cdots 20}{19\cdots 01}a^{3}-\frac{40\cdots 30}{57\cdots 03}a^{2}+\frac{57\cdots 75}{57\cdots 03}a-\frac{17\cdots 42}{57\cdots 03}$, $\frac{43\cdots 30}{33\cdots 11}a^{19}-\frac{23\cdots 99}{33\cdots 11}a^{18}+\frac{57\cdots 12}{10\cdots 33}a^{17}+\frac{18\cdots 62}{33\cdots 11}a^{16}-\frac{50\cdots 97}{33\cdots 11}a^{15}+\frac{35\cdots 05}{33\cdots 11}a^{14}+\frac{86\cdots 52}{33\cdots 11}a^{13}-\frac{28\cdots 58}{33\cdots 11}a^{12}+\frac{27\cdots 64}{10\cdots 33}a^{11}-\frac{20\cdots 37}{33\cdots 11}a^{10}+\frac{62\cdots 00}{10\cdots 33}a^{9}-\frac{16\cdots 89}{33\cdots 11}a^{8}-\frac{13\cdots 37}{33\cdots 11}a^{7}+\frac{90\cdots 90}{33\cdots 11}a^{6}-\frac{15\cdots 00}{10\cdots 33}a^{5}+\frac{15\cdots 90}{33\cdots 11}a^{4}+\frac{92\cdots 94}{10\cdots 33}a^{3}-\frac{45\cdots 03}{10\cdots 33}a^{2}+\frac{38\cdots 85}{10\cdots 33}a-\frac{18\cdots 89}{10\cdots 33}$, $\frac{69\cdots 64}{10\cdots 33}a^{19}-\frac{12\cdots 63}{33\cdots 11}a^{18}-\frac{57\cdots 56}{10\cdots 33}a^{17}+\frac{18\cdots 41}{10\cdots 33}a^{16}+\frac{42\cdots 56}{10\cdots 33}a^{15}+\frac{56\cdots 17}{10\cdots 33}a^{14}+\frac{15\cdots 42}{10\cdots 33}a^{13}+\frac{30\cdots 65}{10\cdots 33}a^{12}+\frac{53\cdots 15}{33\cdots 11}a^{11}+\frac{13\cdots 14}{33\cdots 11}a^{10}+\frac{55\cdots 60}{10\cdots 33}a^{9}+\frac{17\cdots 19}{10\cdots 33}a^{8}+\frac{30\cdots 47}{10\cdots 33}a^{7}+\frac{44\cdots 52}{10\cdots 33}a^{6}+\frac{68\cdots 56}{10\cdots 33}a^{5}-\frac{51\cdots 01}{10\cdots 33}a^{4}-\frac{99\cdots 40}{33\cdots 11}a^{3}+\frac{11\cdots 65}{10\cdots 33}a^{2}-\frac{40\cdots 50}{33\cdots 11}a-\frac{43\cdots 98}{10\cdots 33}$, $\frac{15\cdots 77}{33\cdots 11}a^{19}-\frac{72\cdots 94}{10\cdots 33}a^{18}-\frac{39\cdots 36}{10\cdots 33}a^{17}+\frac{17\cdots 40}{10\cdots 33}a^{16}+\frac{16\cdots 88}{10\cdots 33}a^{15}-\frac{37\cdots 66}{10\cdots 33}a^{14}+\frac{11\cdots 82}{10\cdots 33}a^{13}+\frac{35\cdots 60}{33\cdots 11}a^{12}+\frac{68\cdots 23}{10\cdots 33}a^{11}+\frac{17\cdots 16}{10\cdots 33}a^{10}+\frac{10\cdots 11}{10\cdots 33}a^{9}+\frac{75\cdots 45}{10\cdots 33}a^{8}+\frac{78\cdots 32}{10\cdots 33}a^{7}+\frac{10\cdots 51}{33\cdots 11}a^{6}+\frac{17\cdots 31}{10\cdots 33}a^{5}-\frac{36\cdots 82}{10\cdots 33}a^{4}+\frac{90\cdots 05}{10\cdots 33}a^{3}+\frac{60\cdots 37}{10\cdots 33}a^{2}-\frac{26\cdots 97}{10\cdots 33}a+\frac{21\cdots 14}{10\cdots 33}$, $\frac{12\cdots 37}{33\cdots 11}a^{19}-\frac{18\cdots 88}{33\cdots 11}a^{18}-\frac{11\cdots 23}{33\cdots 11}a^{17}+\frac{13\cdots 27}{10\cdots 33}a^{16}+\frac{63\cdots 42}{33\cdots 11}a^{15}-\frac{43\cdots 37}{10\cdots 33}a^{14}+\frac{17\cdots 27}{33\cdots 11}a^{13}+\frac{16\cdots 80}{10\cdots 33}a^{12}+\frac{17\cdots 97}{33\cdots 11}a^{11}+\frac{30\cdots 88}{33\cdots 11}a^{10}+\frac{13\cdots 11}{33\cdots 11}a^{9}+\frac{49\cdots 30}{10\cdots 33}a^{8}+\frac{18\cdots 89}{33\cdots 11}a^{7}-\frac{46\cdots 30}{10\cdots 33}a^{6}-\frac{36\cdots 39}{33\cdots 11}a^{5}-\frac{55\cdots 93}{33\cdots 11}a^{4}+\frac{47\cdots 80}{33\cdots 11}a^{3}+\frac{34\cdots 30}{10\cdots 33}a^{2}-\frac{12\cdots 80}{10\cdots 33}a-\frac{23\cdots 03}{33\cdots 11}$ Copy content Toggle raw display (assuming GRH)
Copy content comment:Fundamental units
 
Copy content sage:UK.fundamental_units()
 
Copy content gp:K.fu
 
Copy content magma:[K|fUK(g): g in Generators(UK)];
 
Copy content oscar:[K(fUK(a)) for a in gens(UK)]
 
Regulator:  \( 2015201.7242 \) (assuming GRH)
Copy content comment:Regulator
 
Copy content sage:K.regulator()
 
Copy content gp:K.reg
 
Copy content magma:Regulator(K);
 
Copy content oscar:regulator(K)
 

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 2015201.7242 \cdot 61}{2\cdot\sqrt{2351977956823175708448011472615877}}\cr\approx \mathstrut & 0.12153473698 \end{aligned}\] (assuming GRH)

Copy content comment:Analytic class number formula
 
Copy content sage:# self-contained SageMath code snippet to compute the analytic class number formula x = polygen(QQ); K.<a> = NumberField(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283) DK = K.disc(); r1,r2 = K.signature(); RK = K.regulator(); RR = RK.parent() hK = K.class_number(); wK = K.unit_group().torsion_generator().order(); 2^r1 * (2*RR(pi))^r2 * RK * hK / (wK * RR(sqrt(abs(DK))))
 
Copy content gp:\\ self-contained Pari/GP code snippet to compute the analytic class number formula K = bnfinit(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283, 1); [polcoeff (lfunrootres (lfuncreate (K))[1][1][2], -1), 2^K.r1 * (2*Pi)^K.r2 * K.reg * K.no / (K.tu[1] * sqrt (abs (K.disc)))]
 
Copy content magma:/* self-contained Magma code snippet to compute the analytic class number formula */ Qx<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283); 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)));
 
Copy content oscar:# self-contained Oscar code snippet to compute the analytic class number formula Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - x^19 - 9*x^18 + 31*x^17 + 55*x^16 - 48*x^15 + 189*x^14 + 352*x^13 + 1680*x^12 + 4302*x^11 + 4614*x^10 + 17042*x^9 + 24675*x^8 + 19061*x^7 + 33622*x^6 - 55350*x^5 - 15945*x^4 + 101736*x^3 + 82138*x^2 - 16471*x + 40283); OK = ring_of_integers(K); DK = discriminant(OK); UK, fUK = unit_group(OK); clK, fclK = class_group(OK); r1,r2 = signature(K); RK = regulator(K); RR = parent(RK); hK = order(clK); wK = torsion_units_order(K); 2^r1 * (2*pi)^r2 * RK * hK / (wK * sqrt(RR(abs(DK))))
 

Galois group

$C_{20}$ (as 20T1):

Copy content comment:Galois group
 
Copy content sage:K.galois_group()
 
Copy content gp:polgalois(K.pol)
 
Copy content magma:G = GaloisGroup(K);
 
Copy content oscar:G, Gtx = galois_group(K); degree(K) > 1 ? (G, transitive_group_identification(G)) : (G, nothing)
 
A cyclic group of order 20
The 20 conjugacy class representatives for $C_{20}$
Character table for $C_{20}$

Intermediate fields

\(\Q(\sqrt{13}) \), \(\Q(\sqrt{-26 -6 \sqrt{13}})\), \(\Q(\zeta_{11})^+\), 10.10.79589952003133.1

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

Copy content comment:Intermediate fields
 
Copy content sage:K.subfields()[1:-1]
 
Copy content gp:L = nfsubfields(K); L[2..length(L)]
 
Copy content magma:L := Subfields(K); L[2..#L];
 
Copy content oscar:subfields(K)[2:end-1]
 

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type $20$ ${\href{/padicField/3.5.0.1}{5} }^{4}$ $20$ $20$ R R ${\href{/padicField/17.10.0.1}{10} }^{2}$ $20$ ${\href{/padicField/23.2.0.1}{2} }^{10}$ ${\href{/padicField/29.5.0.1}{5} }^{4}$ $20$ $20$ $20$ ${\href{/padicField/43.2.0.1}{2} }^{10}$ $20$ ${\href{/padicField/53.5.0.1}{5} }^{4}$ $20$

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

Copy content comment:Frobenius cycle types
 
Copy content sage:# to obtain a list of [e_i,f_i] for the factorization of the ideal pO_K for p=7 in Sage: p = 7; [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
 
Copy content gp:\\ to obtain a list of [e_i,f_i] for the factorization of the ideal pO_K for p=7 in Pari: p = 7; pfac = idealprimedec(K, p); vector(length(pfac), j, [pfac[j][3], pfac[j][4]])
 
Copy content magma:// to obtain a list of [e_i,f_i] for the factorization of the ideal pO_K for p=7 in Magma: p := 7; [<pr[2], Valuation(Norm(pr[1]), p)> : pr in Factorization(p*Integers(K))];
 
Copy content oscar:# to obtain a list of [e_i,f_i] for the factorization of the ideal pO_K for p=7 in Oscar: p = 7; pfac = factor(ideal(ring_of_integers(K), p)); [(e, valuation(norm(pr),p)) for (pr,e) in pfac]
 

Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
\(11\) Copy content Toggle raw display 11.4.5.16a1.4$x^{20} + 40 x^{18} + 50 x^{17} + 650 x^{16} + 1600 x^{15} + 6440 x^{14} + 19600 x^{13} + 48360 x^{12} + 122000 x^{11} + 252208 x^{10} + 442800 x^{9} + 706720 x^{8} + 904000 x^{7} + 817760 x^{6} + 498400 x^{5} + 201200 x^{4} + 52800 x^{3} + 8640 x^{2} + 800 x + 43$$5$$4$$16$20T1$$[\ ]_{5}^{4}$$
\(13\) Copy content Toggle raw display 13.5.4.15a1.4$x^{20} + 16 x^{16} + 44 x^{15} + 96 x^{12} + 528 x^{11} + 726 x^{10} + 256 x^{8} + 2112 x^{7} + 5808 x^{6} + 5324 x^{5} + 256 x^{4} + 2816 x^{3} + 11616 x^{2} + 21296 x + 14654$$4$$5$$15$20T1$$[\ ]_{4}^{5}$$

Spectrum of ring of integers

(0)(0)(2)(3)(5)(7)(11)(13)(17)(19)(23)(29)(31)(37)(41)(43)(47)(53)(59)