Properties

Label 20.0.150...000.1
Degree $20$
Signature $(0, 10)$
Discriminant $1.506\times 10^{36}$
Root discriminant \(64.40\)
Ramified primes $2,5,11$
Class number $22082$ (GRH)
Class group [22082] (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 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151)
 
Copy content gp:K = bnfinit(y^20 - 4*y^19 + 40*y^18 - 124*y^17 + 815*y^16 - 2164*y^15 + 10834*y^14 - 24620*y^13 + 101774*y^12 - 198776*y^11 + 710860*y^10 - 1188452*y^9 + 3826719*y^8 - 5429272*y^7 + 15991074*y^6 - 18262392*y^5 + 47151361*y^4 - 38741504*y^3 + 92992732*y^2 - 43101732*y + 90594151, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151)
 

\( x^{20} - 4 x^{19} + 40 x^{18} - 124 x^{17} + 815 x^{16} - 2164 x^{15} + 10834 x^{14} - 24620 x^{13} + \cdots + 90594151 \) 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:   \(1505680748169532571648000000000000000\) \(\medspace = 2^{30}\cdot 5^{15}\cdot 11^{16}\) 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:  \(64.40\)
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:  $2^{3/2}5^{3/4}11^{4/5}\approx 64.4001152950292$
Ramified primes:   \(2\), \(5\), \(11\) 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:  \(\Q(\sqrt{5}) \)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_{20}$
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:  \(440=2^{3}\cdot 5\cdot 11\)
Dirichlet character group:    $\lbrace$$\chi_{440}(1,·)$, $\chi_{440}(133,·)$, $\chi_{440}(201,·)$, $\chi_{440}(397,·)$, $\chi_{440}(333,·)$, $\chi_{440}(81,·)$, $\chi_{440}(37,·)$, $\chi_{440}(213,·)$, $\chi_{440}(89,·)$, $\chi_{440}(93,·)$, $\chi_{440}(361,·)$, $\chi_{440}(289,·)$, $\chi_{440}(357,·)$, $\chi_{440}(401,·)$, $\chi_{440}(169,·)$, $\chi_{440}(157,·)$, $\chi_{440}(49,·)$, $\chi_{440}(53,·)$, $\chi_{440}(9,·)$, $\chi_{440}(317,·)$$\rbrace$
This is a CM field.
Reflex fields:  unavailable$^{512}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $\frac{1}{2}a^{10}-\frac{1}{2}a^{8}-\frac{1}{2}a^{4}-\frac{1}{2}a^{2}-\frac{1}{2}$, $\frac{1}{2}a^{11}-\frac{1}{2}a^{9}-\frac{1}{2}a^{5}-\frac{1}{2}a^{3}-\frac{1}{2}a$, $\frac{1}{2}a^{12}-\frac{1}{2}a^{8}-\frac{1}{2}a^{6}-\frac{1}{2}$, $\frac{1}{2}a^{13}-\frac{1}{2}a^{9}-\frac{1}{2}a^{7}-\frac{1}{2}a$, $\frac{1}{2}a^{14}-\frac{1}{2}a^{4}-\frac{1}{2}$, $\frac{1}{2}a^{15}-\frac{1}{2}a^{5}-\frac{1}{2}a$, $\frac{1}{2}a^{16}-\frac{1}{2}a^{6}-\frac{1}{2}a^{2}$, $\frac{1}{2}a^{17}-\frac{1}{2}a^{7}-\frac{1}{2}a^{3}$, $\frac{1}{12\cdots 82}a^{18}-\frac{43\cdots 93}{12\cdots 82}a^{17}-\frac{57\cdots 87}{12\cdots 82}a^{16}+\frac{53\cdots 17}{64\cdots 41}a^{15}-\frac{21\cdots 39}{12\cdots 82}a^{14}-\frac{32\cdots 89}{12\cdots 82}a^{13}-\frac{62\cdots 49}{64\cdots 41}a^{12}-\frac{12\cdots 33}{12\cdots 82}a^{11}+\frac{17\cdots 87}{64\cdots 41}a^{10}-\frac{70\cdots 39}{64\cdots 41}a^{9}-\frac{51\cdots 25}{12\cdots 82}a^{8}-\frac{18\cdots 31}{64\cdots 41}a^{7}-\frac{55\cdots 83}{12\cdots 82}a^{6}-\frac{21\cdots 83}{12\cdots 82}a^{5}+\frac{52\cdots 09}{64\cdots 41}a^{4}-\frac{30\cdots 11}{64\cdots 41}a^{3}-\frac{54\cdots 23}{12\cdots 82}a^{2}+\frac{17\cdots 70}{64\cdots 41}a-\frac{49\cdots 53}{11\cdots 98}$, $\frac{1}{11\cdots 42}a^{19}+\frac{24\cdots 41}{11\cdots 42}a^{18}+\frac{18\cdots 86}{59\cdots 21}a^{17}+\frac{15\cdots 95}{11\cdots 42}a^{16}+\frac{10\cdots 02}{59\cdots 21}a^{15}+\frac{12\cdots 43}{11\cdots 42}a^{14}+\frac{88\cdots 83}{59\cdots 21}a^{13}+\frac{24\cdots 39}{11\cdots 42}a^{12}-\frac{97\cdots 71}{11\cdots 42}a^{11}-\frac{36\cdots 64}{59\cdots 21}a^{10}+\frac{16\cdots 96}{59\cdots 21}a^{9}+\frac{10\cdots 57}{59\cdots 21}a^{8}-\frac{28\cdots 06}{59\cdots 21}a^{7}-\frac{28\cdots 39}{59\cdots 21}a^{6}+\frac{16\cdots 76}{59\cdots 21}a^{5}+\frac{19\cdots 55}{59\cdots 21}a^{4}+\frac{47\cdots 19}{11\cdots 42}a^{3}-\frac{40\cdots 99}{11\cdots 42}a^{2}+\frac{22\cdots 01}{11\cdots 42}a+\frac{24\cdots 91}{54\cdots 69}$ 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:  $C_{22082}$, which has order $22082$ (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:  $C_{22082}$, which has order $22082$ (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:   $22082$ (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:   $\frac{404924790182}{64\cdots 41}a^{19}+\frac{1764075181645}{64\cdots 41}a^{18}+\frac{1618421850242}{64\cdots 41}a^{17}+\frac{107520892245065}{12\cdots 82}a^{16}-\frac{11594532537538}{64\cdots 41}a^{15}+\frac{911820723687953}{64\cdots 41}a^{14}-\frac{875504250517845}{64\cdots 41}a^{13}+\frac{20\cdots 91}{12\cdots 82}a^{12}-\frac{94\cdots 06}{64\cdots 41}a^{11}+\frac{79\cdots 03}{64\cdots 41}a^{10}-\frac{73\cdots 84}{64\cdots 41}a^{9}+\frac{94\cdots 61}{12\cdots 82}a^{8}-\frac{36\cdots 84}{64\cdots 41}a^{7}+\frac{21\cdots 53}{64\cdots 41}a^{6}-\frac{14\cdots 39}{64\cdots 41}a^{5}+\frac{71\cdots 12}{64\cdots 41}a^{4}-\frac{33\cdots 38}{64\cdots 41}a^{3}+\frac{31\cdots 29}{12\cdots 82}a^{2}-\frac{41\cdots 36}{64\cdots 41}a+\frac{10\cdots 53}{11\cdots 98}$, $\frac{32\cdots 80}{59\cdots 21}a^{19}+\frac{11\cdots 90}{59\cdots 21}a^{18}-\frac{20\cdots 20}{59\cdots 21}a^{17}+\frac{38\cdots 90}{59\cdots 21}a^{16}-\frac{66\cdots 76}{59\cdots 21}a^{15}+\frac{72\cdots 70}{59\cdots 21}a^{14}-\frac{11\cdots 40}{59\cdots 21}a^{13}+\frac{89\cdots 90}{59\cdots 21}a^{12}-\frac{11\cdots 00}{59\cdots 21}a^{11}+\frac{77\cdots 30}{59\cdots 21}a^{10}-\frac{83\cdots 20}{59\cdots 21}a^{9}+\frac{50\cdots 90}{59\cdots 21}a^{8}-\frac{43\cdots 60}{59\cdots 21}a^{7}+\frac{25\cdots 40}{59\cdots 21}a^{6}-\frac{16\cdots 12}{59\cdots 21}a^{5}+\frac{98\cdots 75}{59\cdots 21}a^{4}-\frac{42\cdots 40}{59\cdots 21}a^{3}+\frac{23\cdots 20}{59\cdots 21}a^{2}-\frac{52\cdots 20}{59\cdots 21}a+\frac{31\cdots 60}{54\cdots 69}$, $\frac{31\cdots 04}{59\cdots 21}a^{19}+\frac{72\cdots 60}{59\cdots 21}a^{18}-\frac{51\cdots 16}{59\cdots 21}a^{17}+\frac{24\cdots 75}{59\cdots 21}a^{16}-\frac{22\cdots 52}{59\cdots 21}a^{15}+\frac{46\cdots 96}{59\cdots 21}a^{14}-\frac{41\cdots 80}{59\cdots 21}a^{13}+\frac{58\cdots 96}{59\cdots 21}a^{12}-\frac{43\cdots 44}{59\cdots 21}a^{11}+\frac{51\cdots 12}{59\cdots 21}a^{10}-\frac{29\cdots 08}{59\cdots 21}a^{9}+\frac{33\cdots 31}{59\cdots 21}a^{8}-\frac{13\cdots 88}{59\cdots 21}a^{7}+\frac{16\cdots 56}{59\cdots 21}a^{6}-\frac{35\cdots 40}{59\cdots 21}a^{5}+\frac{61\cdots 24}{59\cdots 21}a^{4}-\frac{10\cdots 16}{59\cdots 21}a^{3}+\frac{14\cdots 08}{59\cdots 21}a^{2}+\frac{60\cdots 72}{59\cdots 21}a+\frac{12\cdots 31}{54\cdots 69}$, $\frac{13\cdots 96}{59\cdots 21}a^{19}+\frac{21\cdots 80}{59\cdots 21}a^{18}-\frac{12\cdots 04}{59\cdots 21}a^{17}+\frac{10\cdots 00}{59\cdots 21}a^{16}-\frac{46\cdots 08}{59\cdots 21}a^{15}+\frac{21\cdots 24}{59\cdots 21}a^{14}-\frac{85\cdots 80}{59\cdots 21}a^{13}+\frac{29\cdots 79}{59\cdots 21}a^{12}-\frac{98\cdots 76}{59\cdots 21}a^{11}+\frac{26\cdots 24}{59\cdots 21}a^{10}-\frac{78\cdots 32}{59\cdots 21}a^{9}+\frac{17\cdots 89}{59\cdots 21}a^{8}-\frac{44\cdots 12}{59\cdots 21}a^{7}+\frac{86\cdots 74}{59\cdots 21}a^{6}-\frac{18\cdots 24}{59\cdots 21}a^{5}+\frac{32\cdots 01}{59\cdots 21}a^{4}-\frac{53\cdots 84}{59\cdots 21}a^{3}+\frac{75\cdots 92}{59\cdots 21}a^{2}-\frac{69\cdots 92}{59\cdots 21}a+\frac{85\cdots 02}{54\cdots 69}$, $\frac{81\cdots 76}{59\cdots 21}a^{19}+\frac{37\cdots 30}{59\cdots 21}a^{18}-\frac{15\cdots 04}{59\cdots 21}a^{17}+\frac{13\cdots 15}{59\cdots 21}a^{16}-\frac{43\cdots 24}{59\cdots 21}a^{15}+\frac{25\cdots 74}{59\cdots 21}a^{14}-\frac{69\cdots 60}{59\cdots 21}a^{13}+\frac{31\cdots 94}{59\cdots 21}a^{12}-\frac{72\cdots 56}{59\cdots 21}a^{11}+\frac{26\cdots 18}{59\cdots 21}a^{10}-\frac{53\cdots 12}{59\cdots 21}a^{9}+\frac{17\cdots 59}{59\cdots 21}a^{8}-\frac{30\cdots 72}{59\cdots 21}a^{7}+\frac{88\cdots 84}{59\cdots 21}a^{6}-\frac{13\cdots 72}{59\cdots 21}a^{5}+\frac{36\cdots 51}{59\cdots 21}a^{4}-\frac{42\cdots 24}{59\cdots 21}a^{3}+\frac{91\cdots 12}{59\cdots 21}a^{2}-\frac{58\cdots 92}{59\cdots 21}a+\frac{14\cdots 60}{54\cdots 69}$, $\frac{51\cdots 82}{59\cdots 21}a^{19}+\frac{11\cdots 65}{59\cdots 21}a^{18}-\frac{31\cdots 38}{59\cdots 21}a^{17}+\frac{86\cdots 75}{11\cdots 42}a^{16}-\frac{10\cdots 38}{59\cdots 21}a^{15}+\frac{84\cdots 93}{59\cdots 21}a^{14}-\frac{18\cdots 85}{59\cdots 21}a^{13}+\frac{21\cdots 91}{11\cdots 42}a^{12}-\frac{20\cdots 86}{59\cdots 21}a^{11}+\frac{85\cdots 07}{54\cdots 69}a^{10}-\frac{15\cdots 04}{59\cdots 21}a^{9}+\frac{12\cdots 81}{11\cdots 42}a^{8}-\frac{82\cdots 44}{59\cdots 21}a^{7}+\frac{29\cdots 13}{59\cdots 21}a^{6}-\frac{33\cdots 03}{59\cdots 21}a^{5}+\frac{10\cdots 72}{59\cdots 21}a^{4}-\frac{91\cdots 98}{59\cdots 21}a^{3}+\frac{51\cdots 89}{11\cdots 42}a^{2}-\frac{11\cdots 16}{59\cdots 21}a+\frac{66\cdots 73}{10\cdots 38}$, $\frac{19\cdots 78}{59\cdots 21}a^{19}+\frac{44\cdots 05}{59\cdots 21}a^{18}-\frac{26\cdots 22}{59\cdots 21}a^{17}+\frac{37\cdots 25}{11\cdots 42}a^{16}-\frac{82\cdots 86}{59\cdots 21}a^{15}+\frac{37\cdots 97}{59\cdots 21}a^{14}-\frac{14\cdots 05}{59\cdots 21}a^{13}+\frac{95\cdots 99}{11\cdots 42}a^{12}-\frac{15\cdots 42}{59\cdots 21}a^{11}+\frac{41\cdots 51}{59\cdots 21}a^{10}-\frac{12\cdots 96}{59\cdots 21}a^{9}+\frac{54\cdots 19}{11\cdots 42}a^{8}-\frac{69\cdots 56}{59\cdots 21}a^{7}+\frac{13\cdots 57}{59\cdots 21}a^{6}-\frac{29\cdots 63}{59\cdots 21}a^{5}+\frac{47\cdots 48}{59\cdots 21}a^{4}-\frac{90\cdots 82}{59\cdots 21}a^{3}+\frac{21\cdots 73}{11\cdots 42}a^{2}-\frac{12\cdots 88}{59\cdots 21}a+\frac{41\cdots 11}{10\cdots 38}$, $\frac{66\cdots 82}{59\cdots 21}a^{19}+\frac{22\cdots 25}{59\cdots 21}a^{18}-\frac{13\cdots 18}{59\cdots 21}a^{17}+\frac{17\cdots 25}{11\cdots 42}a^{16}-\frac{35\cdots 78}{59\cdots 21}a^{15}+\frac{15\cdots 73}{59\cdots 21}a^{14}-\frac{58\cdots 25}{59\cdots 21}a^{13}+\frac{36\cdots 41}{11\cdots 42}a^{12}-\frac{59\cdots 66}{59\cdots 21}a^{11}+\frac{15\cdots 27}{59\cdots 21}a^{10}-\frac{44\cdots 64}{59\cdots 21}a^{9}+\frac{18\cdots 41}{11\cdots 42}a^{8}-\frac{25\cdots 44}{59\cdots 21}a^{7}+\frac{43\cdots 83}{59\cdots 21}a^{6}-\frac{11\cdots 39}{59\cdots 21}a^{5}+\frac{15\cdots 47}{59\cdots 21}a^{4}-\frac{37\cdots 98}{59\cdots 21}a^{3}+\frac{66\cdots 89}{11\cdots 42}a^{2}-\frac{53\cdots 96}{59\cdots 21}a+\frac{13\cdots 69}{10\cdots 38}$, $\frac{75\cdots 30}{59\cdots 21}a^{19}+\frac{58\cdots 86}{59\cdots 21}a^{18}-\frac{15\cdots 65}{59\cdots 21}a^{17}+\frac{23\cdots 01}{59\cdots 21}a^{16}-\frac{30\cdots 90}{59\cdots 21}a^{15}+\frac{97\cdots 25}{11\cdots 42}a^{14}-\frac{70\cdots 01}{59\cdots 21}a^{13}+\frac{12\cdots 77}{11\cdots 42}a^{12}-\frac{84\cdots 66}{59\cdots 21}a^{11}+\frac{57\cdots 14}{59\cdots 21}a^{10}-\frac{67\cdots 61}{59\cdots 21}a^{9}+\frac{76\cdots 51}{11\cdots 42}a^{8}-\frac{37\cdots 86}{59\cdots 21}a^{7}+\frac{38\cdots 41}{11\cdots 42}a^{6}-\frac{16\cdots 00}{59\cdots 21}a^{5}+\frac{14\cdots 87}{11\cdots 42}a^{4}-\frac{49\cdots 18}{59\cdots 21}a^{3}+\frac{17\cdots 24}{59\cdots 21}a^{2}-\frac{66\cdots 03}{59\cdots 21}a+\frac{20\cdots 67}{54\cdots 69}$ 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:  \( 140644.599182 \) (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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 140644.599182 \cdot 22082}{2\cdot\sqrt{1505680748169532571648000000000000000}}\cr\approx \mathstrut & 0.121356684930 \end{aligned}\] (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 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151) 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 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151, 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 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151); 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 - 4*x^19 + 40*x^18 - 124*x^17 + 815*x^16 - 2164*x^15 + 10834*x^14 - 24620*x^13 + 101774*x^12 - 198776*x^11 + 710860*x^10 - 1188452*x^9 + 3826719*x^8 - 5429272*x^7 + 15991074*x^6 - 18262392*x^5 + 47151361*x^4 - 38741504*x^3 + 92992732*x^2 - 43101732*x + 90594151); 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

\(\Q(\sqrt{5}) \), \(\Q(\sqrt{-5 + \sqrt{5}})\), \(\Q(\zeta_{11})^+\), 10.10.669871503125.1

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 R $20$ R $20$ R $20$ $20$ ${\href{/padicField/19.5.0.1}{5} }^{4}$ ${\href{/padicField/23.4.0.1}{4} }^{5}$ ${\href{/padicField/29.5.0.1}{5} }^{4}$ ${\href{/padicField/31.5.0.1}{5} }^{4}$ $20$ ${\href{/padicField/41.5.0.1}{5} }^{4}$ ${\href{/padicField/43.4.0.1}{4} }^{5}$ $20$ $20$ ${\href{/padicField/59.5.0.1}{5} }^{4}$

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

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
\(2\) Copy content Toggle raw display 2.10.2.30a1.114$x^{20} + 2 x^{16} + 2 x^{15} + 2 x^{13} + 3 x^{12} + 4 x^{11} + 7 x^{10} + 2 x^{9} + 4 x^{8} + 4 x^{7} + 9 x^{6} + 16 x^{5} + 3 x^{4} + 8 x^{3} + 7 x^{2} + 6 x + 7$$2$$10$$30$20T1not computed
\(5\) Copy content Toggle raw display 5.5.4.15a1.2$x^{20} + 16 x^{16} + 12 x^{15} + 96 x^{12} + 144 x^{11} + 54 x^{10} + 256 x^{8} + 576 x^{7} + 432 x^{6} + 108 x^{5} + 256 x^{4} + 768 x^{3} + 869 x^{2} + 432 x + 81$$4$$5$$15$20T1not computed
\(11\) Copy content Toggle raw display 11.2.5.8a1.2$x^{10} + 35 x^{9} + 500 x^{8} + 3710 x^{7} + 14985 x^{6} + 31367 x^{5} + 29970 x^{4} + 14840 x^{3} + 4000 x^{2} + 560 x + 43$$5$$2$$8$$C_{10}$$$[\ ]_{5}^{2}$$
11.2.5.8a1.2$x^{10} + 35 x^{9} + 500 x^{8} + 3710 x^{7} + 14985 x^{6} + 31367 x^{5} + 29970 x^{4} + 14840 x^{3} + 4000 x^{2} + 560 x + 43$$5$$2$$8$$C_{10}$$$[\ ]_{5}^{2}$$

Spectrum of ring of integers

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