Properties

Label 20.2.206...339.1
Degree $20$
Signature $(2, 9)$
Discriminant $-2.060\times 10^{47}$
Root discriminant \(232.11\)
Ramified prime $19$
Class number $1$ (GRH)
Class group trivial (GRH)
Galois group $\PGL(2,19)$ (as 20T362)

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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 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888)
 
Copy content gp:K = bnfinit(y^20 - 5*y^19 + 76*y^18 - 247*y^17 + 1197*y^16 - 8474*y^15 + 15561*y^14 - 112347*y^13 + 325793*y^12 - 787322*y^11 + 3851661*y^10 - 5756183*y^9 + 20865344*y^8 - 48001353*y^7 + 45895165*y^6 - 245996344*y^5 + 8889264*y^4 - 588303992*y^3 - 54940704*y^2 - 538817408*y + 31141888, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888)
 

\( x^{20} - 5 x^{19} + 76 x^{18} - 247 x^{17} + 1197 x^{16} - 8474 x^{15} + 15561 x^{14} - 112347 x^{13} + \cdots + 31141888 \) 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:  $(2, 9)$
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:   \(-206007596521214410095208558252435839890349094339\) \(\medspace = -\,19^{37}\) 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:  \(232.11\)
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:  $19^{683/342}\approx 357.90532196302917$
Ramified primes:   \(19\) 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:  \(\Q(\sqrt{-19}) \)
$\Aut(K/\Q)$:   $C_1$
Copy content comment:Automorphisms
 
Copy content sage:K.automorphisms()
 
Copy content magma:Automorphisms(K);
 
Copy content oscar:automorphism_group(K)
 
This field is not Galois over $\Q$.
This is not a CM field.
This field has no CM subfields.

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

$1$, $a$, $a^{2}$, $\frac{1}{2}a^{3}-\frac{1}{2}a^{2}-\frac{1}{2}a$, $\frac{1}{2}a^{4}-\frac{1}{2}a$, $\frac{1}{2}a^{5}-\frac{1}{2}a^{2}$, $\frac{1}{4}a^{6}-\frac{1}{4}a^{4}+\frac{1}{4}a^{2}-\frac{1}{2}a$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{5}-\frac{1}{4}a^{3}-\frac{1}{2}a$, $\frac{1}{4}a^{8}-\frac{1}{4}a^{2}$, $\frac{1}{8}a^{9}-\frac{1}{8}a^{8}-\frac{1}{8}a^{6}-\frac{1}{8}a^{4}-\frac{1}{8}a^{3}$, $\frac{1}{16}a^{10}-\frac{1}{16}a^{9}-\frac{1}{16}a^{7}-\frac{1}{16}a^{5}-\frac{1}{16}a^{4}$, $\frac{1}{16}a^{11}-\frac{1}{16}a^{9}-\frac{1}{16}a^{8}-\frac{1}{16}a^{7}-\frac{1}{16}a^{6}-\frac{1}{8}a^{5}-\frac{1}{16}a^{4}$, $\frac{1}{32}a^{12}-\frac{1}{16}a^{9}-\frac{1}{32}a^{8}-\frac{1}{16}a^{7}-\frac{1}{16}a^{6}+\frac{3}{16}a^{5}-\frac{1}{32}a^{4}-\frac{1}{4}a^{3}-\frac{1}{2}a^{2}-\frac{1}{4}a$, $\frac{1}{32}a^{13}+\frac{1}{32}a^{9}+\frac{1}{16}a^{8}-\frac{1}{8}a^{7}+\frac{1}{16}a^{6}-\frac{3}{32}a^{5}+\frac{1}{16}a^{4}-\frac{1}{8}a^{3}$, $\frac{1}{32}a^{14}-\frac{1}{32}a^{10}-\frac{1}{8}a^{7}+\frac{1}{32}a^{6}-\frac{1}{8}a^{5}+\frac{1}{16}a^{4}-\frac{1}{8}a^{3}$, $\frac{1}{64}a^{15}-\frac{1}{64}a^{14}-\frac{1}{64}a^{13}+\frac{1}{64}a^{11}+\frac{1}{64}a^{10}-\frac{3}{64}a^{9}-\frac{1}{8}a^{8}+\frac{7}{64}a^{7}-\frac{1}{64}a^{6}-\frac{11}{64}a^{5}-\frac{1}{32}a^{4}-\frac{1}{8}a^{3}+\frac{1}{8}a^{2}-\frac{1}{4}a$, $\frac{1}{64}a^{16}-\frac{1}{64}a^{13}-\frac{1}{64}a^{12}-\frac{1}{32}a^{11}+\frac{1}{64}a^{9}-\frac{3}{64}a^{8}+\frac{1}{32}a^{7}+\frac{3}{32}a^{6}+\frac{3}{64}a^{5}+\frac{1}{16}a^{4}+\frac{1}{8}a^{2}$, $\frac{1}{128}a^{17}-\frac{1}{128}a^{15}-\frac{1}{64}a^{13}+\frac{3}{128}a^{11}+\frac{3}{64}a^{9}-\frac{1}{128}a^{7}+\frac{1}{16}a^{6}+\frac{25}{128}a^{5}+\frac{1}{16}a^{4}+\frac{3}{16}a^{3}+\frac{1}{16}a^{2}+\frac{1}{4}a$, $\frac{1}{512}a^{18}-\frac{1}{256}a^{17}+\frac{1}{512}a^{16}-\frac{1}{256}a^{15}+\frac{1}{256}a^{14}-\frac{1}{256}a^{13}-\frac{7}{512}a^{12}+\frac{5}{256}a^{11}-\frac{7}{256}a^{10}-\frac{7}{256}a^{9}+\frac{9}{512}a^{8}+\frac{29}{256}a^{7}+\frac{49}{512}a^{6}-\frac{5}{32}a^{5}+\frac{7}{64}a^{4}+\frac{9}{64}a^{3}+\frac{5}{16}a^{2}$, $\frac{1}{10\cdots 32}a^{19}-\frac{32\cdots 85}{10\cdots 32}a^{18}-\frac{96\cdots 71}{35\cdots 44}a^{17}-\frac{45\cdots 89}{10\cdots 32}a^{16}-\frac{18\cdots 37}{26\cdots 08}a^{15}-\frac{91\cdots 93}{44\cdots 68}a^{14}-\frac{72\cdots 67}{35\cdots 44}a^{13}-\frac{32\cdots 35}{35\cdots 44}a^{12}+\frac{33\cdots 11}{13\cdots 04}a^{11}+\frac{93\cdots 33}{88\cdots 36}a^{10}-\frac{20\cdots 51}{35\cdots 44}a^{9}+\frac{61\cdots 63}{10\cdots 32}a^{8}-\frac{42\cdots 79}{35\cdots 44}a^{7}+\frac{24\cdots 27}{35\cdots 44}a^{6}-\frac{32\cdots 15}{26\cdots 08}a^{5}-\frac{22\cdots 99}{11\cdots 92}a^{4}+\frac{16\cdots 19}{44\cdots 68}a^{3}+\frac{95\cdots 05}{41\cdots 22}a^{2}+\frac{17\cdots 95}{83\cdots 44}a-\frac{18\cdots 77}{20\cdots 61}$ 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:  $2$

Class group and class number

Ideal class group:  Trivial group, which has order $1$ (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:  Trivial group, which has order $1$ (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);
 

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:  $10$
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:   $\frac{52\cdots 05}{17\cdots 72}a^{19}-\frac{22\cdots 89}{17\cdots 72}a^{18}+\frac{37\cdots 45}{17\cdots 72}a^{17}-\frac{99\cdots 01}{17\cdots 72}a^{16}+\frac{24\cdots 45}{88\cdots 36}a^{15}-\frac{98\cdots 95}{44\cdots 68}a^{14}+\frac{47\cdots 35}{17\cdots 72}a^{13}-\frac{48\cdots 21}{17\cdots 72}a^{12}+\frac{65\cdots 71}{88\cdots 36}a^{11}-\frac{15\cdots 51}{11\cdots 92}a^{10}+\frac{16\cdots 71}{17\cdots 72}a^{9}-\frac{16\cdots 89}{17\cdots 72}a^{8}+\frac{74\cdots 93}{17\cdots 72}a^{7}-\frac{18\cdots 75}{17\cdots 72}a^{6}+\frac{20\cdots 17}{88\cdots 36}a^{5}-\frac{12\cdots 85}{22\cdots 84}a^{4}-\frac{67\cdots 13}{22\cdots 84}a^{3}-\frac{13\cdots 65}{11\cdots 92}a^{2}-\frac{72\cdots 81}{13\cdots 74}a-\frac{59\cdots 93}{69\cdots 87}$, $\frac{13\cdots 99}{17\cdots 72}a^{19}-\frac{39\cdots 07}{17\cdots 72}a^{18}+\frac{77\cdots 41}{17\cdots 72}a^{17}-\frac{91\cdots 87}{17\cdots 72}a^{16}+\frac{38\cdots 63}{22\cdots 84}a^{15}-\frac{22\cdots 59}{55\cdots 96}a^{14}-\frac{49\cdots 31}{17\cdots 72}a^{13}-\frac{49\cdots 63}{17\cdots 72}a^{12}+\frac{37\cdots 05}{44\cdots 68}a^{11}+\frac{61\cdots 99}{44\cdots 68}a^{10}+\frac{16\cdots 69}{17\cdots 72}a^{9}+\frac{15\cdots 49}{17\cdots 72}a^{8}-\frac{16\cdots 35}{17\cdots 72}a^{7}-\frac{12\cdots 93}{17\cdots 72}a^{6}-\frac{16\cdots 69}{44\cdots 68}a^{5}-\frac{99\cdots 47}{22\cdots 84}a^{4}-\frac{26\cdots 29}{22\cdots 84}a^{3}-\frac{17\cdots 41}{27\cdots 48}a^{2}-\frac{32\cdots 11}{27\cdots 48}a+\frac{48\cdots 25}{69\cdots 87}$, $\frac{31\cdots 47}{35\cdots 44}a^{19}-\frac{14\cdots 03}{35\cdots 44}a^{18}+\frac{20\cdots 57}{35\cdots 44}a^{17}-\frac{53\cdots 83}{35\cdots 44}a^{16}+\frac{85\cdots 49}{22\cdots 84}a^{15}-\frac{52\cdots 67}{11\cdots 92}a^{14}+\frac{13\cdots 41}{35\cdots 44}a^{13}-\frac{13\cdots 71}{35\cdots 44}a^{12}+\frac{10\cdots 05}{88\cdots 36}a^{11}-\frac{90\cdots 53}{88\cdots 36}a^{10}+\frac{33\cdots 09}{35\cdots 44}a^{9}+\frac{48\cdots 33}{35\cdots 44}a^{8}-\frac{20\cdots 95}{35\cdots 44}a^{7}-\frac{18\cdots 49}{35\cdots 44}a^{6}-\frac{14\cdots 87}{44\cdots 68}a^{5}-\frac{63\cdots 69}{22\cdots 84}a^{4}-\frac{46\cdots 53}{44\cdots 68}a^{3}-\frac{44\cdots 97}{11\cdots 92}a^{2}-\frac{29\cdots 61}{27\cdots 48}a+\frac{43\cdots 83}{69\cdots 87}$, $\frac{11\cdots 35}{88\cdots 36}a^{19}-\frac{31\cdots 53}{35\cdots 44}a^{18}+\frac{18\cdots 61}{17\cdots 72}a^{17}-\frac{15\cdots 73}{35\cdots 44}a^{16}+\frac{26\cdots 67}{17\cdots 72}a^{15}-\frac{17\cdots 09}{17\cdots 72}a^{14}+\frac{49\cdots 11}{17\cdots 72}a^{13}-\frac{39\cdots 81}{35\cdots 44}a^{12}+\frac{73\cdots 29}{17\cdots 72}a^{11}-\frac{15\cdots 33}{17\cdots 72}a^{10}+\frac{56\cdots 77}{17\cdots 72}a^{9}-\frac{23\cdots 89}{35\cdots 44}a^{8}+\frac{22\cdots 95}{17\cdots 72}a^{7}-\frac{11\cdots 05}{35\cdots 44}a^{6}+\frac{22\cdots 29}{88\cdots 36}a^{5}-\frac{35\cdots 87}{44\cdots 68}a^{4}+\frac{15\cdots 55}{44\cdots 68}a^{3}-\frac{19\cdots 25}{27\cdots 48}a^{2}+\frac{94\cdots 25}{27\cdots 48}a+\frac{92\cdots 59}{69\cdots 87}$, $\frac{12\cdots 57}{10\cdots 32}a^{19}-\frac{31\cdots 27}{53\cdots 16}a^{18}+\frac{31\cdots 19}{35\cdots 44}a^{17}-\frac{14\cdots 19}{53\cdots 16}a^{16}+\frac{69\cdots 85}{53\cdots 16}a^{15}-\frac{17\cdots 27}{17\cdots 72}a^{14}+\frac{58\cdots 23}{35\cdots 44}a^{13}-\frac{22\cdots 75}{17\cdots 72}a^{12}+\frac{19\cdots 37}{53\cdots 16}a^{11}-\frac{14\cdots 33}{17\cdots 72}a^{10}+\frac{15\cdots 15}{35\cdots 44}a^{9}-\frac{32\cdots 21}{53\cdots 16}a^{8}+\frac{77\cdots 07}{35\cdots 44}a^{7}-\frac{46\cdots 13}{88\cdots 36}a^{6}+\frac{17\cdots 19}{41\cdots 22}a^{5}-\frac{11\cdots 05}{44\cdots 68}a^{4}-\frac{91\cdots 35}{55\cdots 96}a^{3}-\frac{97\cdots 69}{16\cdots 88}a^{2}-\frac{22\cdots 77}{20\cdots 61}a-\frac{96\cdots 53}{20\cdots 61}$, $\frac{20\cdots 17}{17\cdots 72}a^{19}+\frac{68\cdots 09}{88\cdots 36}a^{18}-\frac{21\cdots 93}{17\cdots 72}a^{17}+\frac{75\cdots 63}{88\cdots 36}a^{16}-\frac{84\cdots 85}{22\cdots 84}a^{15}+\frac{72\cdots 83}{88\cdots 36}a^{14}-\frac{16\cdots 79}{17\cdots 72}a^{13}+\frac{18\cdots 21}{88\cdots 36}a^{12}-\frac{20\cdots 29}{22\cdots 84}a^{11}+\frac{35\cdots 61}{88\cdots 36}a^{10}-\frac{12\cdots 39}{17\cdots 72}a^{9}+\frac{27\cdots 21}{88\cdots 36}a^{8}-\frac{10\cdots 97}{17\cdots 72}a^{7}+\frac{48\cdots 19}{44\cdots 68}a^{6}-\frac{32\cdots 13}{88\cdots 36}a^{5}+\frac{15\cdots 01}{11\cdots 92}a^{4}-\frac{10\cdots 73}{11\cdots 92}a^{3}+\frac{35\cdots 87}{11\cdots 92}a^{2}-\frac{70\cdots 88}{69\cdots 87}a+\frac{40\cdots 07}{69\cdots 87}$, $\frac{19\cdots 59}{10\cdots 32}a^{19}-\frac{13\cdots 09}{26\cdots 08}a^{18}+\frac{33\cdots 41}{35\cdots 44}a^{17}-\frac{10\cdots 91}{26\cdots 08}a^{16}-\frac{30\cdots 83}{53\cdots 16}a^{15}-\frac{69\cdots 59}{17\cdots 72}a^{14}-\frac{99\cdots 27}{35\cdots 44}a^{13}+\frac{10\cdots 87}{44\cdots 68}a^{12}-\frac{99\cdots 15}{53\cdots 16}a^{11}+\frac{27\cdots 35}{17\cdots 72}a^{10}-\frac{66\cdots 71}{35\cdots 44}a^{9}+\frac{19\cdots 17}{13\cdots 04}a^{8}-\frac{10\cdots 11}{35\cdots 44}a^{7}+\frac{91\cdots 67}{17\cdots 72}a^{6}-\frac{69\cdots 73}{33\cdots 76}a^{5}+\frac{25\cdots 05}{44\cdots 68}a^{4}-\frac{12\cdots 63}{22\cdots 84}a^{3}-\frac{14\cdots 63}{83\cdots 44}a^{2}-\frac{50\cdots 97}{83\cdots 44}a+\frac{71\cdots 79}{20\cdots 61}$, $\frac{10\cdots 75}{26\cdots 08}a^{19}-\frac{88\cdots 59}{53\cdots 16}a^{18}+\frac{12\cdots 21}{44\cdots 68}a^{17}-\frac{39\cdots 79}{53\cdots 16}a^{16}+\frac{10\cdots 53}{26\cdots 08}a^{15}-\frac{25\cdots 75}{88\cdots 36}a^{14}+\frac{83\cdots 11}{22\cdots 84}a^{13}-\frac{66\cdots 25}{17\cdots 72}a^{12}+\frac{26\cdots 51}{26\cdots 08}a^{11}-\frac{18\cdots 47}{88\cdots 36}a^{10}+\frac{55\cdots 71}{44\cdots 68}a^{9}-\frac{69\cdots 59}{53\cdots 16}a^{8}+\frac{67\cdots 63}{11\cdots 92}a^{7}-\frac{25\cdots 33}{17\cdots 72}a^{6}+\frac{66\cdots 27}{13\cdots 04}a^{5}-\frac{89\cdots 87}{11\cdots 92}a^{4}-\frac{79\cdots 93}{22\cdots 84}a^{3}-\frac{15\cdots 15}{83\cdots 44}a^{2}-\frac{47\cdots 61}{83\cdots 44}a-\frac{27\cdots 79}{20\cdots 61}$, $\frac{13\cdots 71}{35\cdots 44}a^{19}-\frac{27\cdots 55}{44\cdots 68}a^{18}+\frac{40\cdots 63}{35\cdots 44}a^{17}+\frac{40\cdots 47}{44\cdots 68}a^{16}-\frac{15\cdots 11}{17\cdots 72}a^{15}+\frac{64\cdots 55}{17\cdots 72}a^{14}-\frac{93\cdots 49}{35\cdots 44}a^{13}+\frac{77\cdots 75}{88\cdots 36}a^{12}-\frac{55\cdots 55}{17\cdots 72}a^{11}+\frac{19\cdots 97}{17\cdots 72}a^{10}-\frac{87\cdots 53}{35\cdots 44}a^{9}+\frac{66\cdots 63}{88\cdots 36}a^{8}-\frac{53\cdots 97}{35\cdots 44}a^{7}+\frac{44\cdots 19}{17\cdots 72}a^{6}-\frac{17\cdots 13}{27\cdots 48}a^{5}+\frac{16\cdots 93}{44\cdots 68}a^{4}-\frac{31\cdots 95}{22\cdots 84}a^{3}+\frac{59\cdots 89}{27\cdots 48}a^{2}-\frac{92\cdots 61}{69\cdots 87}a+\frac{52\cdots 67}{69\cdots 87}$, $\frac{21\cdots 47}{53\cdots 16}a^{19}-\frac{47\cdots 83}{13\cdots 04}a^{18}+\frac{55\cdots 11}{17\cdots 72}a^{17}-\frac{21\cdots 05}{13\cdots 04}a^{16}+\frac{21\cdots 81}{83\cdots 44}a^{15}-\frac{21\cdots 83}{88\cdots 36}a^{14}+\frac{18\cdots 49}{17\cdots 72}a^{13}-\frac{16\cdots 07}{22\cdots 84}a^{12}+\frac{36\cdots 45}{33\cdots 76}a^{11}-\frac{15\cdots 89}{88\cdots 36}a^{10}+\frac{49\cdots 89}{17\cdots 72}a^{9}-\frac{12\cdots 39}{66\cdots 52}a^{8}-\frac{42\cdots 21}{17\cdots 72}a^{7}-\frac{18\cdots 57}{88\cdots 36}a^{6}+\frac{14\cdots 81}{26\cdots 08}a^{5}+\frac{43\cdots 40}{69\cdots 87}a^{4}+\frac{18\cdots 11}{27\cdots 48}a^{3}+\frac{73\cdots 97}{33\cdots 76}a^{2}+\frac{48\cdots 31}{41\cdots 22}a+\frac{47\cdots 83}{20\cdots 61}$ 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:  \( 496592090559000000 \) (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)
 
Unit signature rank:  \( 2 \) (assuming GRH)

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{2}\cdot(2\pi)^{9}\cdot 496592090559000000 \cdot 1}{2\cdot\sqrt{206007596521214410095208558252435839890349094339}}\cr\approx \mathstrut & 33.3969642233715 \end{aligned}\] (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 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888) 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 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888, 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 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888); 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 - 5*x^19 + 76*x^18 - 247*x^17 + 1197*x^16 - 8474*x^15 + 15561*x^14 - 112347*x^13 + 325793*x^12 - 787322*x^11 + 3851661*x^10 - 5756183*x^9 + 20865344*x^8 - 48001353*x^7 + 45895165*x^6 - 245996344*x^5 + 8889264*x^4 - 588303992*x^3 - 54940704*x^2 - 538817408*x + 31141888); 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

$\PGL(2,19)$ (as 20T362):

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 non-solvable group of order 6840
The 21 conjugacy class representatives for $\PGL(2,19)$
Character table for $\PGL(2,19)$

Intermediate fields

The extension is primitive: there are no intermediate fields between this field and $\Q$.
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]
 

Sibling fields

Degree 40 sibling: data not computed
Minimal sibling: This field is its own minimal sibling

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type ${\href{/padicField/2.2.0.1}{2} }^{9}{,}\,{\href{/padicField/2.1.0.1}{1} }^{2}$ $18{,}\,{\href{/padicField/3.1.0.1}{1} }^{2}$ ${\href{/padicField/5.10.0.1}{10} }^{2}$ ${\href{/padicField/7.9.0.1}{9} }^{2}{,}\,{\href{/padicField/7.1.0.1}{1} }^{2}$ ${\href{/padicField/11.5.0.1}{5} }^{4}$ $20$ ${\href{/padicField/17.9.0.1}{9} }^{2}{,}\,{\href{/padicField/17.1.0.1}{1} }^{2}$ R ${\href{/padicField/23.2.0.1}{2} }^{10}$ $20$ $18{,}\,{\href{/padicField/31.1.0.1}{1} }^{2}$ $20$ $18{,}\,{\href{/padicField/41.1.0.1}{1} }^{2}$ $19{,}\,{\href{/padicField/43.1.0.1}{1} }$ ${\href{/padicField/47.3.0.1}{3} }^{6}{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ ${\href{/padicField/53.4.0.1}{4} }^{5}$ $18{,}\,{\href{/padicField/59.1.0.1}{1} }^{2}$

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
\(19\) Copy content Toggle raw display $\Q_{19}$$x + 17$$1$$1$$0$Trivial$$[\ ]$$
19.1.19.37a1.13$x^{19} + 4332 x + 19$$19$$1$$37$$F_{19}$$$[\frac{37}{18}]_{18}$$

Spectrum of ring of integers

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

Additional information

This field is associated with the 19-torsion points on any elliptic curve in the isogeny class 19.a.