Properties

Label 20.0.834...741.1
Degree $20$
Signature $(0, 10)$
Discriminant $8.342\times 10^{33}$
Root discriminant \(49.67\)
Ramified prime $61$
Class number $41$ (GRH)
Class group [41] (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 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611)
 
Copy content gp:K = bnfinit(y^20 - y^19 + 2*y^18 + 36*y^17 - 29*y^16 + 51*y^15 + 413*y^14 - 267*y^13 + 414*y^12 + 1778*y^11 - 745*y^10 + 691*y^9 + 3278*y^8 - 541*y^7 - 1330*y^6 + 1820*y^5 - 261*y^4 - 439*y^3 + 2983*y^2 - 522*y + 611, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - x^19 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - x^19 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611)
 

\( x^{20} - x^{19} + 2 x^{18} + 36 x^{17} - 29 x^{16} + 51 x^{15} + 413 x^{14} - 267 x^{13} + 414 x^{12} + \cdots + 611 \) 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:   \(8341936223273428359616333847680741\) \(\medspace = 61^{19}\) 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:  \(49.67\)
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:  $61^{19/20}\approx 49.6664756335031$
Ramified primes:   \(61\) 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:  \(\Q(\sqrt{61}) \)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_{20}$
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:  \(61\)
Dirichlet character group:    $\lbrace$$\chi_{61}(1,·)$, $\chi_{61}(3,·)$, $\chi_{61}(8,·)$, $\chi_{61}(9,·)$, $\chi_{61}(11,·)$, $\chi_{61}(20,·)$, $\chi_{61}(23,·)$, $\chi_{61}(24,·)$, $\chi_{61}(27,·)$, $\chi_{61}(28,·)$, $\chi_{61}(33,·)$, $\chi_{61}(34,·)$, $\chi_{61}(37,·)$, $\chi_{61}(38,·)$, $\chi_{61}(41,·)$, $\chi_{61}(50,·)$, $\chi_{61}(52,·)$, $\chi_{61}(53,·)$, $\chi_{61}(58,·)$, $\chi_{61}(60,·)$$\rbrace$
This is a CM field.
Reflex fields:  unavailable$^{512}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $\frac{1}{13}a^{11}+\frac{3}{13}a^{10}-\frac{1}{13}a^{8}-\frac{3}{13}a^{7}+\frac{1}{13}a^{5}+\frac{3}{13}a^{4}-\frac{1}{13}a^{2}-\frac{3}{13}a$, $\frac{1}{13}a^{12}+\frac{4}{13}a^{10}-\frac{1}{13}a^{9}-\frac{4}{13}a^{7}+\frac{1}{13}a^{6}+\frac{4}{13}a^{4}-\frac{1}{13}a^{3}-\frac{4}{13}a$, $\frac{1}{13}a^{13}-\frac{1}{13}a$, $\frac{1}{13}a^{14}-\frac{1}{13}a^{2}$, $\frac{1}{13}a^{15}-\frac{1}{13}a^{3}$, $\frac{1}{611}a^{16}+\frac{17}{611}a^{15}+\frac{1}{47}a^{14}-\frac{1}{611}a^{13}+\frac{4}{611}a^{12}+\frac{4}{611}a^{11}-\frac{271}{611}a^{10}+\frac{113}{611}a^{9}+\frac{87}{611}a^{8}-\frac{223}{611}a^{7}+\frac{277}{611}a^{6}+\frac{69}{611}a^{5}-\frac{168}{611}a^{4}-\frac{255}{611}a^{3}+\frac{295}{611}a^{2}+\frac{38}{611}a$, $\frac{1}{611}a^{17}+\frac{6}{611}a^{15}+\frac{1}{47}a^{14}+\frac{21}{611}a^{13}-\frac{17}{611}a^{12}-\frac{10}{611}a^{11}-\frac{215}{611}a^{10}-\frac{48}{611}a^{9}-\frac{198}{611}a^{8}-\frac{162}{611}a^{7}+\frac{295}{611}a^{6}+\frac{210}{611}a^{5}+\frac{110}{611}a^{4}+\frac{24}{611}a^{3}-\frac{42}{611}a^{2}+\frac{12}{611}a$, $\frac{1}{7943}a^{18}+\frac{6}{7943}a^{17}-\frac{4}{7943}a^{16}-\frac{215}{7943}a^{15}-\frac{172}{7943}a^{14}+\frac{119}{7943}a^{13}-\frac{105}{7943}a^{12}+\frac{202}{7943}a^{11}+\frac{3722}{7943}a^{10}-\frac{1052}{7943}a^{9}-\frac{2737}{7943}a^{8}+\frac{1036}{7943}a^{7}-\frac{132}{7943}a^{6}-\frac{3691}{7943}a^{5}-\frac{2007}{7943}a^{4}-\frac{2189}{7943}a^{3}+\frac{1322}{7943}a^{2}-\frac{3880}{7943}a+\frac{3}{13}$, $\frac{1}{14\cdots 23}a^{19}+\frac{71\cdots 02}{14\cdots 23}a^{18}-\frac{98\cdots 90}{31\cdots 09}a^{17}-\frac{80\cdots 77}{14\cdots 23}a^{16}-\frac{26\cdots 63}{14\cdots 23}a^{15}+\frac{29\cdots 32}{14\cdots 23}a^{14}-\frac{22\cdots 02}{14\cdots 23}a^{13}-\frac{53\cdots 38}{14\cdots 23}a^{12}+\frac{50\cdots 84}{14\cdots 23}a^{11}-\frac{52\cdots 52}{11\cdots 71}a^{10}-\frac{60\cdots 32}{14\cdots 23}a^{9}+\frac{60\cdots 44}{14\cdots 23}a^{8}-\frac{32\cdots 63}{14\cdots 23}a^{7}-\frac{28\cdots 36}{14\cdots 23}a^{6}+\frac{42\cdots 73}{14\cdots 23}a^{5}-\frac{85\cdots 54}{14\cdots 23}a^{4}-\frac{72\cdots 64}{14\cdots 23}a^{3}+\frac{63\cdots 01}{14\cdots 23}a^{2}+\frac{54\cdots 72}{14\cdots 23}a-\frac{59\cdots 10}{23\cdots 93}$ 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:  No
Index:  Not computed
Inessential primes:  $13$

Class group and class number

Ideal class group:  $C_{41}$, which has order $41$ (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:  $C_{41}$, which has order $41$ (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:   $41$ (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:   $\frac{60\cdots 32}{14\cdots 23}a^{19}+\frac{10\cdots 60}{14\cdots 23}a^{18}+\frac{95\cdots 05}{14\cdots 23}a^{17}+\frac{24\cdots 37}{14\cdots 23}a^{16}+\frac{45\cdots 89}{14\cdots 23}a^{15}+\frac{56\cdots 47}{14\cdots 23}a^{14}+\frac{30\cdots 63}{14\cdots 23}a^{13}+\frac{60\cdots 40}{14\cdots 23}a^{12}-\frac{21\cdots 46}{14\cdots 23}a^{11}+\frac{11\cdots 05}{11\cdots 71}a^{10}+\frac{31\cdots 05}{14\cdots 23}a^{9}-\frac{37\cdots 24}{14\cdots 23}a^{8}+\frac{26\cdots 24}{14\cdots 23}a^{7}+\frac{66\cdots 21}{14\cdots 23}a^{6}-\frac{15\cdots 75}{14\cdots 23}a^{5}-\frac{10\cdots 57}{14\cdots 23}a^{4}+\frac{22\cdots 49}{14\cdots 23}a^{3}-\frac{11\cdots 04}{14\cdots 23}a^{2}+\frac{50\cdots 73}{14\cdots 23}a+\frac{49\cdots 23}{23\cdots 93}$, $\frac{49\cdots 62}{14\cdots 23}a^{19}-\frac{45\cdots 57}{14\cdots 23}a^{18}+\frac{14\cdots 47}{14\cdots 23}a^{17}+\frac{17\cdots 52}{14\cdots 23}a^{16}-\frac{11\cdots 79}{14\cdots 23}a^{15}+\frac{42\cdots 48}{14\cdots 23}a^{14}+\frac{19\cdots 68}{14\cdots 23}a^{13}-\frac{91\cdots 57}{14\cdots 23}a^{12}+\frac{39\cdots 26}{14\cdots 23}a^{11}+\frac{60\cdots 43}{11\cdots 71}a^{10}-\frac{11\cdots 52}{14\cdots 23}a^{9}+\frac{11\cdots 49}{14\cdots 23}a^{8}+\frac{13\cdots 48}{14\cdots 23}a^{7}+\frac{12\cdots 39}{14\cdots 23}a^{6}+\frac{63\cdots 71}{14\cdots 23}a^{5}+\frac{62\cdots 58}{14\cdots 23}a^{4}-\frac{70\cdots 27}{14\cdots 23}a^{3}+\frac{57\cdots 08}{14\cdots 23}a^{2}-\frac{19\cdots 60}{14\cdots 23}a+\frac{45\cdots 31}{23\cdots 93}$, $\frac{35\cdots 50}{14\cdots 23}a^{19}+\frac{13\cdots 74}{14\cdots 23}a^{18}-\frac{15\cdots 35}{14\cdots 23}a^{17}+\frac{15\cdots 57}{14\cdots 23}a^{16}+\frac{52\cdots 97}{14\cdots 23}a^{15}-\frac{51\cdots 31}{14\cdots 23}a^{14}+\frac{21\cdots 03}{14\cdots 23}a^{13}+\frac{61\cdots 92}{14\cdots 23}a^{12}-\frac{55\cdots 32}{14\cdots 23}a^{11}+\frac{85\cdots 13}{11\cdots 71}a^{10}+\frac{27\cdots 53}{14\cdots 23}a^{9}-\frac{21\cdots 73}{14\cdots 23}a^{8}+\frac{80\cdots 68}{14\cdots 23}a^{7}+\frac{54\cdots 06}{14\cdots 23}a^{6}-\frac{26\cdots 48}{14\cdots 23}a^{5}-\frac{50\cdots 02}{14\cdots 23}a^{4}+\frac{41\cdots 79}{14\cdots 23}a^{3}+\frac{24\cdots 36}{14\cdots 23}a^{2}+\frac{23\cdots 63}{14\cdots 23}a+\frac{17\cdots 97}{23\cdots 93}$, $\frac{79\cdots 19}{14\cdots 23}a^{19}+\frac{57\cdots 47}{14\cdots 23}a^{18}-\frac{53\cdots 40}{14\cdots 23}a^{17}+\frac{22\cdots 60}{14\cdots 23}a^{16}+\frac{19\cdots 75}{14\cdots 23}a^{15}-\frac{12\cdots 12}{14\cdots 23}a^{14}+\frac{60\cdots 78}{14\cdots 23}a^{13}+\frac{19\cdots 83}{14\cdots 23}a^{12}-\frac{55\cdots 97}{14\cdots 23}a^{11}+\frac{42\cdots 26}{11\cdots 71}a^{10}+\frac{57\cdots 57}{14\cdots 23}a^{9}+\frac{36\cdots 12}{14\cdots 23}a^{8}+\frac{15\cdots 26}{14\cdots 23}a^{7}+\frac{53\cdots 86}{14\cdots 23}a^{6}+\frac{12\cdots 12}{14\cdots 23}a^{5}+\frac{14\cdots 26}{31\cdots 09}a^{4}+\frac{25\cdots 51}{14\cdots 23}a^{3}-\frac{21\cdots 10}{14\cdots 23}a^{2}+\frac{31\cdots 34}{14\cdots 23}a-\frac{28\cdots 14}{23\cdots 93}$, $\frac{18\cdots 85}{56\cdots 39}a^{19}+\frac{28\cdots 84}{56\cdots 39}a^{18}-\frac{733348794514119}{56\cdots 39}a^{17}+\frac{75\cdots 75}{56\cdots 39}a^{16}+\frac{11\cdots 67}{56\cdots 39}a^{15}-\frac{39\cdots 54}{56\cdots 39}a^{14}+\frac{95\cdots 34}{56\cdots 39}a^{13}+\frac{13\cdots 26}{56\cdots 39}a^{12}-\frac{60\cdots 87}{56\cdots 39}a^{11}+\frac{32\cdots 68}{43\cdots 03}a^{10}+\frac{63\cdots 57}{56\cdots 39}a^{9}-\frac{37\cdots 54}{56\cdots 39}a^{8}+\frac{25\cdots 67}{56\cdots 39}a^{7}+\frac{12\cdots 88}{56\cdots 39}a^{6}-\frac{65\cdots 31}{56\cdots 39}a^{5}-\frac{16\cdots 37}{56\cdots 39}a^{4}+\frac{10\cdots 53}{56\cdots 39}a^{3}+\frac{13\cdots 75}{56\cdots 39}a^{2}-\frac{52\cdots 24}{56\cdots 39}a-\frac{62\cdots 68}{92\cdots 49}$, $\frac{16\cdots 67}{14\cdots 23}a^{19}+\frac{29\cdots 73}{14\cdots 23}a^{18}-\frac{95\cdots 99}{14\cdots 23}a^{17}+\frac{63\cdots 66}{14\cdots 23}a^{16}+\frac{11\cdots 17}{14\cdots 23}a^{15}-\frac{36\cdots 91}{14\cdots 23}a^{14}+\frac{63\cdots 85}{14\cdots 23}a^{13}+\frac{15\cdots 20}{14\cdots 23}a^{12}-\frac{44\cdots 45}{14\cdots 23}a^{11}+\frac{68\cdots 45}{11\cdots 71}a^{10}+\frac{83\cdots 83}{14\cdots 23}a^{9}-\frac{20\cdots 85}{14\cdots 23}a^{8}-\frac{11\cdots 98}{14\cdots 23}a^{7}+\frac{22\cdots 14}{14\cdots 23}a^{6}-\frac{27\cdots 62}{14\cdots 23}a^{5}-\frac{44\cdots 20}{14\cdots 23}a^{4}+\frac{25\cdots 56}{14\cdots 23}a^{3}+\frac{39\cdots 27}{14\cdots 23}a^{2}-\frac{19\cdots 17}{14\cdots 23}a+\frac{13\cdots 45}{23\cdots 93}$, $\frac{13\cdots 80}{14\cdots 23}a^{19}+\frac{90\cdots 50}{14\cdots 23}a^{18}+\frac{33\cdots 17}{31\cdots 09}a^{17}+\frac{51\cdots 99}{14\cdots 23}a^{16}+\frac{43\cdots 48}{14\cdots 23}a^{15}-\frac{88\cdots 85}{14\cdots 23}a^{14}+\frac{61\cdots 58}{14\cdots 23}a^{13}+\frac{60\cdots 01}{14\cdots 23}a^{12}-\frac{19\cdots 08}{14\cdots 23}a^{11}+\frac{20\cdots 51}{11\cdots 71}a^{10}+\frac{33\cdots 14}{14\cdots 23}a^{9}-\frac{13\cdots 01}{14\cdots 23}a^{8}+\frac{32\cdots 44}{14\cdots 23}a^{7}+\frac{79\cdots 52}{14\cdots 23}a^{6}-\frac{29\cdots 82}{14\cdots 23}a^{5}-\frac{57\cdots 54}{14\cdots 23}a^{4}+\frac{43\cdots 55}{14\cdots 23}a^{3}+\frac{39\cdots 07}{14\cdots 23}a^{2}+\frac{29\cdots 70}{14\cdots 23}a+\frac{16\cdots 96}{23\cdots 93}$, $\frac{43\cdots 11}{14\cdots 23}a^{19}+\frac{15\cdots 37}{14\cdots 23}a^{18}-\frac{98\cdots 90}{14\cdots 23}a^{17}+\frac{19\cdots 21}{14\cdots 23}a^{16}+\frac{60\cdots 87}{14\cdots 23}a^{15}-\frac{31\cdots 81}{14\cdots 23}a^{14}+\frac{26\cdots 49}{14\cdots 23}a^{13}+\frac{71\cdots 80}{14\cdots 23}a^{12}-\frac{32\cdots 79}{14\cdots 23}a^{11}+\frac{11\cdots 77}{11\cdots 71}a^{10}+\frac{32\cdots 87}{14\cdots 23}a^{9}-\frac{11\cdots 99}{14\cdots 23}a^{8}+\frac{20\cdots 85}{14\cdots 23}a^{7}+\frac{62\cdots 25}{14\cdots 23}a^{6}-\frac{16\cdots 56}{14\cdots 23}a^{5}-\frac{29\cdots 44}{14\cdots 23}a^{4}+\frac{34\cdots 19}{14\cdots 23}a^{3}-\frac{13\cdots 40}{14\cdots 23}a^{2}+\frac{49\cdots 17}{14\cdots 23}a+\frac{76\cdots 21}{23\cdots 93}$, $\frac{43\cdots 05}{14\cdots 23}a^{19}+\frac{46\cdots 23}{14\cdots 23}a^{18}-\frac{35\cdots 80}{14\cdots 23}a^{17}+\frac{25\cdots 19}{14\cdots 23}a^{16}+\frac{16\cdots 86}{14\cdots 23}a^{15}-\frac{10\cdots 38}{14\cdots 23}a^{14}+\frac{41\cdots 97}{14\cdots 23}a^{13}+\frac{18\cdots 58}{14\cdots 23}a^{12}-\frac{91\cdots 77}{14\cdots 23}a^{11}+\frac{19\cdots 26}{11\cdots 71}a^{10}+\frac{77\cdots 07}{14\cdots 23}a^{9}-\frac{25\cdots 88}{14\cdots 23}a^{8}+\frac{38\cdots 81}{14\cdots 23}a^{7}+\frac{12\cdots 31}{14\cdots 23}a^{6}-\frac{28\cdots 82}{14\cdots 23}a^{5}-\frac{57\cdots 45}{14\cdots 23}a^{4}+\frac{79\cdots 26}{14\cdots 23}a^{3}-\frac{21\cdots 83}{14\cdots 23}a^{2}+\frac{14\cdots 59}{14\cdots 23}a+\frac{18\cdots 31}{23\cdots 93}$ 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:  \( 36549838.4715 \) (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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 36549838.4715 \cdot 41}{2\cdot\sqrt{8341936223273428359616333847680741}}\cr\approx \mathstrut & 0.786691710589 \end{aligned}\] (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 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611) 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 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611, 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 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611); 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 + 2*x^18 + 36*x^17 - 29*x^16 + 51*x^15 + 413*x^14 - 267*x^13 + 414*x^12 + 1778*x^11 - 745*x^10 + 691*x^9 + 3278*x^8 - 541*x^7 - 1330*x^6 + 1820*x^5 - 261*x^4 - 439*x^3 + 2983*x^2 - 522*x + 611); 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

\(\Q(\sqrt{61}) \), \(\Q(\sqrt{-122 +10 \sqrt{61}})\), 5.5.13845841.1, 10.10.11694146092834141.1

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 $20$ ${\href{/padicField/3.10.0.1}{10} }^{2}$ ${\href{/padicField/5.10.0.1}{10} }^{2}$ $20$ ${\href{/padicField/11.4.0.1}{4} }^{5}$ ${\href{/padicField/13.1.0.1}{1} }^{20}$ $20$ ${\href{/padicField/19.10.0.1}{10} }^{2}$ $20$ ${\href{/padicField/29.4.0.1}{4} }^{5}$ $20$ $20$ ${\href{/padicField/41.10.0.1}{10} }^{2}$ $20$ ${\href{/padicField/47.1.0.1}{1} }^{20}$ $20$ $20$

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
\(61\) Copy content Toggle raw display 61.1.20.19a1.1$x^{20} + 61$$20$$1$$19$20T1$$[\ ]_{20}$$

Spectrum of ring of integers

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