Properties

Label 20.0.193...125.1
Degree $20$
Signature $(0, 10)$
Discriminant $1.933\times 10^{38}$
Root discriminant \(82.09\)
Ramified primes $5,11,13$
Class number $331922$ (GRH)
Class group [331922] (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 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121)
 
Copy content gp:K = bnfinit(y^20 - y^19 + 61*y^18 - 97*y^17 + 1959*y^16 - 3824*y^15 + 42001*y^14 - 86676*y^13 + 651922*y^12 - 1272388*y^11 + 7455206*y^10 - 12647278*y^9 + 61958107*y^8 - 85243529*y^7 + 364805340*y^6 - 374838878*y^5 + 1487095911*y^4 - 973042478*y^3 + 3808215652*y^2 - 1149290321*y + 4751163121, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - x^19 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - x^19 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121)
 

\( x^{20} - x^{19} + 61 x^{18} - 97 x^{17} + 1959 x^{16} - 3824 x^{15} + 42001 x^{14} - 86676 x^{13} + \cdots + 4751163121 \) 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:   \(193315443721344440894830801055908203125\) \(\medspace = 5^{15}\cdot 11^{16}\cdot 13^{10}\) 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:  \(82.09\)
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:  $5^{3/4}11^{4/5}13^{1/2}\approx 82.09436114174476$
Ramified primes:   \(5\), \(11\), \(13\) 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:  \(\Q(\sqrt{5}) \)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_{20}$
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:  \(715=5\cdot 11\cdot 13\)
Dirichlet character group:    $\lbrace$$\chi_{715}(1,·)$, $\chi_{715}(196,·)$, $\chi_{715}(456,·)$, $\chi_{715}(521,·)$, $\chi_{715}(586,·)$, $\chi_{715}(12,·)$, $\chi_{715}(14,·)$, $\chi_{715}(207,·)$, $\chi_{715}(144,·)$, $\chi_{715}(339,·)$, $\chi_{715}(532,·)$, $\chi_{715}(597,·)$, $\chi_{715}(599,·)$, $\chi_{715}(664,·)$, $\chi_{715}(38,·)$, $\chi_{715}(103,·)$, $\chi_{715}(168,·)$, $\chi_{715}(298,·)$, $\chi_{715}(493,·)$, $\chi_{715}(467,·)$$\rbrace$
This is a CM field.
Reflex fields:  unavailable$^{512}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $\frac{1}{19}a^{15}+\frac{2}{19}a^{14}+\frac{7}{19}a^{13}-\frac{6}{19}a^{12}-\frac{9}{19}a^{11}-\frac{5}{19}a^{10}-\frac{8}{19}a^{9}+\frac{9}{19}a^{8}-\frac{1}{19}a^{7}-\frac{9}{19}a^{6}-\frac{8}{19}a^{5}-\frac{9}{19}a^{3}+\frac{5}{19}a^{2}-\frac{5}{19}a+\frac{4}{19}$, $\frac{1}{19}a^{16}+\frac{3}{19}a^{14}-\frac{1}{19}a^{13}+\frac{3}{19}a^{12}-\frac{6}{19}a^{11}+\frac{2}{19}a^{10}+\frac{6}{19}a^{9}-\frac{7}{19}a^{7}-\frac{9}{19}a^{6}-\frac{3}{19}a^{5}-\frac{9}{19}a^{4}+\frac{4}{19}a^{3}+\frac{4}{19}a^{2}-\frac{5}{19}a-\frac{8}{19}$, $\frac{1}{1691}a^{17}-\frac{42}{1691}a^{16}-\frac{43}{1691}a^{15}+\frac{370}{1691}a^{14}-\frac{524}{1691}a^{13}-\frac{464}{1691}a^{12}+\frac{421}{1691}a^{11}-\frac{8}{89}a^{10}+\frac{135}{1691}a^{9}-\frac{592}{1691}a^{8}+\frac{293}{1691}a^{7}-\frac{503}{1691}a^{6}-\frac{674}{1691}a^{5}+\frac{6}{19}a^{4}-\frac{320}{1691}a^{3}+\frac{34}{1691}a^{2}-\frac{841}{1691}a-\frac{30}{89}$, $\frac{1}{221521}a^{18}-\frac{65}{221521}a^{17}+\frac{2169}{221521}a^{16}-\frac{2913}{221521}a^{15}-\frac{312}{221521}a^{14}+\frac{51460}{221521}a^{13}+\frac{37081}{221521}a^{12}+\frac{14373}{221521}a^{11}-\frac{18174}{221521}a^{10}-\frac{51668}{221521}a^{9}+\frac{41410}{221521}a^{8}+\frac{22128}{221521}a^{7}-\frac{29511}{221521}a^{6}+\frac{4226}{11659}a^{5}+\frac{55661}{221521}a^{4}+\frac{81264}{221521}a^{3}-\frac{61965}{221521}a^{2}-\frac{91231}{221521}a+\frac{3983}{11659}$, $\frac{1}{21\cdots 19}a^{19}+\frac{15\cdots 26}{11\cdots 01}a^{18}-\frac{30\cdots 74}{21\cdots 19}a^{17}-\frac{37\cdots 37}{21\cdots 19}a^{16}+\frac{15\cdots 87}{21\cdots 19}a^{15}+\frac{90\cdots 05}{21\cdots 19}a^{14}+\frac{92\cdots 48}{21\cdots 19}a^{13}-\frac{80\cdots 79}{21\cdots 19}a^{12}+\frac{85\cdots 74}{21\cdots 19}a^{11}-\frac{34\cdots 67}{21\cdots 19}a^{10}-\frac{83\cdots 41}{21\cdots 19}a^{9}+\frac{45\cdots 88}{21\cdots 19}a^{8}+\frac{83\cdots 06}{21\cdots 19}a^{7}-\frac{74\cdots 26}{21\cdots 19}a^{6}+\frac{49\cdots 67}{21\cdots 19}a^{5}+\frac{64\cdots 95}{21\cdots 19}a^{4}-\frac{32\cdots 06}{11\cdots 01}a^{3}-\frac{67\cdots 75}{21\cdots 19}a^{2}+\frac{60\cdots 92}{21\cdots 19}a-\frac{84\cdots 34}{21\cdots 19}$ 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:  $C_{331922}$, which has order $331922$ (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:  $C_{331922}$, which has order $331922$ (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:   $331922$ (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:   $\frac{13\cdots 22}{75\cdots 91}a^{19}-\frac{24\cdots 29}{75\cdots 91}a^{18}+\frac{32\cdots 53}{75\cdots 91}a^{17}-\frac{11\cdots 31}{75\cdots 91}a^{16}+\frac{22\cdots 16}{75\cdots 91}a^{15}-\frac{32\cdots 37}{75\cdots 91}a^{14}+\frac{70\cdots 04}{75\cdots 91}a^{13}-\frac{31\cdots 11}{39\cdots 89}a^{12}+\frac{12\cdots 96}{75\cdots 91}a^{11}-\frac{77\cdots 05}{75\cdots 91}a^{10}+\frac{14\cdots 49}{75\cdots 91}a^{9}-\frac{71\cdots 83}{75\cdots 91}a^{8}+\frac{10\cdots 84}{75\cdots 91}a^{7}-\frac{45\cdots 52}{75\cdots 91}a^{6}+\frac{51\cdots 88}{75\cdots 91}a^{5}-\frac{15\cdots 51}{57\cdots 61}a^{4}+\frac{14\cdots 00}{75\cdots 91}a^{3}-\frac{54\cdots 48}{75\cdots 91}a^{2}+\frac{17\cdots 41}{75\cdots 91}a-\frac{25\cdots 38}{75\cdots 91}$, $\frac{48\cdots 30}{11\cdots 01}a^{19}-\frac{42\cdots 00}{11\cdots 01}a^{18}+\frac{28\cdots 70}{11\cdots 01}a^{17}-\frac{44\cdots 25}{11\cdots 01}a^{16}+\frac{85\cdots 50}{11\cdots 01}a^{15}-\frac{17\cdots 90}{11\cdots 01}a^{14}+\frac{17\cdots 40}{11\cdots 01}a^{13}-\frac{37\cdots 60}{11\cdots 01}a^{12}+\frac{25\cdots 40}{11\cdots 01}a^{11}-\frac{52\cdots 24}{11\cdots 01}a^{10}+\frac{26\cdots 60}{11\cdots 01}a^{9}-\frac{47\cdots 70}{11\cdots 01}a^{8}+\frac{22\cdots 70}{12\cdots 09}a^{7}-\frac{28\cdots 10}{11\cdots 01}a^{6}+\frac{95\cdots 78}{11\cdots 01}a^{5}-\frac{10\cdots 60}{11\cdots 01}a^{4}+\frac{28\cdots 60}{11\cdots 01}a^{3}-\frac{21\cdots 70}{11\cdots 01}a^{2}+\frac{39\cdots 75}{11\cdots 01}a-\frac{18\cdots 29}{11\cdots 01}$, $\frac{17\cdots 66}{11\cdots 01}a^{19}+\frac{62\cdots 24}{11\cdots 01}a^{18}+\frac{93\cdots 77}{11\cdots 01}a^{17}-\frac{26\cdots 29}{11\cdots 01}a^{16}+\frac{19\cdots 73}{88\cdots 71}a^{15}-\frac{17\cdots 61}{11\cdots 01}a^{14}+\frac{45\cdots 11}{11\cdots 01}a^{13}-\frac{39\cdots 27}{11\cdots 01}a^{12}+\frac{60\cdots 83}{11\cdots 01}a^{11}-\frac{47\cdots 99}{11\cdots 01}a^{10}+\frac{59\cdots 28}{11\cdots 01}a^{9}-\frac{36\cdots 12}{11\cdots 01}a^{8}+\frac{44\cdots 29}{11\cdots 01}a^{7}-\frac{23\cdots 65}{11\cdots 01}a^{6}+\frac{25\cdots 44}{11\cdots 01}a^{5}-\frac{15\cdots 96}{11\cdots 01}a^{4}+\frac{10\cdots 43}{11\cdots 01}a^{3}-\frac{69\cdots 12}{11\cdots 01}a^{2}+\frac{22\cdots 61}{11\cdots 01}a-\frac{25\cdots 32}{11\cdots 01}$, $\frac{17\cdots 66}{11\cdots 01}a^{19}+\frac{62\cdots 24}{11\cdots 01}a^{18}+\frac{93\cdots 77}{11\cdots 01}a^{17}-\frac{26\cdots 29}{11\cdots 01}a^{16}+\frac{19\cdots 73}{88\cdots 71}a^{15}-\frac{17\cdots 61}{11\cdots 01}a^{14}+\frac{45\cdots 11}{11\cdots 01}a^{13}-\frac{39\cdots 27}{11\cdots 01}a^{12}+\frac{60\cdots 83}{11\cdots 01}a^{11}-\frac{47\cdots 99}{11\cdots 01}a^{10}+\frac{59\cdots 28}{11\cdots 01}a^{9}-\frac{36\cdots 12}{11\cdots 01}a^{8}+\frac{44\cdots 29}{11\cdots 01}a^{7}-\frac{23\cdots 65}{11\cdots 01}a^{6}+\frac{25\cdots 44}{11\cdots 01}a^{5}-\frac{15\cdots 96}{11\cdots 01}a^{4}+\frac{10\cdots 43}{11\cdots 01}a^{3}-\frac{69\cdots 12}{11\cdots 01}a^{2}+\frac{22\cdots 61}{11\cdots 01}a-\frac{14\cdots 31}{11\cdots 01}$, $\frac{87\cdots 26}{11\cdots 01}a^{19}+\frac{33\cdots 44}{11\cdots 01}a^{18}+\frac{43\cdots 37}{11\cdots 01}a^{17}+\frac{13\cdots 96}{11\cdots 01}a^{16}+\frac{98\cdots 83}{11\cdots 01}a^{15}+\frac{33\cdots 59}{11\cdots 01}a^{14}+\frac{13\cdots 11}{11\cdots 01}a^{13}+\frac{59\cdots 83}{11\cdots 01}a^{12}+\frac{11\cdots 03}{11\cdots 01}a^{11}+\frac{82\cdots 27}{11\cdots 01}a^{10}+\frac{74\cdots 58}{11\cdots 01}a^{9}+\frac{81\cdots 93}{11\cdots 01}a^{8}+\frac{40\cdots 89}{11\cdots 01}a^{7}+\frac{49\cdots 25}{11\cdots 01}a^{6}+\frac{31\cdots 66}{11\cdots 01}a^{5}+\frac{14\cdots 89}{11\cdots 01}a^{4}+\frac{23\cdots 33}{11\cdots 01}a^{3}+\frac{78\cdots 73}{11\cdots 01}a^{2}+\frac{63\cdots 01}{11\cdots 01}a-\frac{14\cdots 37}{11\cdots 01}$, $\frac{12\cdots 43}{21\cdots 19}a^{19}-\frac{28\cdots 61}{21\cdots 19}a^{18}+\frac{72\cdots 47}{21\cdots 19}a^{17}-\frac{20\cdots 18}{21\cdots 19}a^{16}+\frac{23\cdots 03}{21\cdots 19}a^{15}-\frac{70\cdots 08}{21\cdots 19}a^{14}+\frac{50\cdots 87}{21\cdots 19}a^{13}-\frac{14\cdots 74}{21\cdots 19}a^{12}+\frac{76\cdots 05}{21\cdots 19}a^{11}-\frac{20\cdots 71}{21\cdots 19}a^{10}+\frac{83\cdots 11}{21\cdots 19}a^{9}-\frac{18\cdots 60}{21\cdots 19}a^{8}+\frac{62\cdots 00}{21\cdots 19}a^{7}-\frac{11\cdots 66}{21\cdots 19}a^{6}+\frac{16\cdots 49}{11\cdots 01}a^{5}-\frac{40\cdots 07}{21\cdots 19}a^{4}+\frac{88\cdots 38}{21\cdots 19}a^{3}-\frac{76\cdots 16}{21\cdots 19}a^{2}+\frac{11\cdots 86}{21\cdots 19}a-\frac{52\cdots 51}{21\cdots 19}$, $\frac{46\cdots 98}{21\cdots 19}a^{19}-\frac{15\cdots 80}{21\cdots 19}a^{18}+\frac{28\cdots 75}{21\cdots 19}a^{17}-\frac{10\cdots 05}{21\cdots 19}a^{16}+\frac{95\cdots 55}{21\cdots 19}a^{15}-\frac{25\cdots 13}{16\cdots 49}a^{14}+\frac{21\cdots 65}{21\cdots 19}a^{13}-\frac{36\cdots 39}{11\cdots 01}a^{12}+\frac{33\cdots 39}{21\cdots 19}a^{11}-\frac{94\cdots 35}{21\cdots 19}a^{10}+\frac{37\cdots 82}{21\cdots 19}a^{9}-\frac{87\cdots 65}{21\cdots 19}a^{8}+\frac{28\cdots 83}{21\cdots 19}a^{7}-\frac{52\cdots 37}{21\cdots 19}a^{6}+\frac{14\cdots 50}{21\cdots 19}a^{5}-\frac{17\cdots 22}{21\cdots 19}a^{4}+\frac{42\cdots 43}{21\cdots 19}a^{3}-\frac{24\cdots 85}{21\cdots 19}a^{2}+\frac{58\cdots 17}{21\cdots 19}a+\frac{18\cdots 74}{21\cdots 19}$, $\frac{10\cdots 32}{21\cdots 19}a^{19}-\frac{60\cdots 19}{21\cdots 19}a^{18}+\frac{62\cdots 13}{21\cdots 19}a^{17}-\frac{82\cdots 71}{21\cdots 19}a^{16}+\frac{18\cdots 26}{21\cdots 19}a^{15}-\frac{33\cdots 57}{21\cdots 19}a^{14}+\frac{37\cdots 24}{21\cdots 19}a^{13}-\frac{43\cdots 39}{12\cdots 09}a^{12}+\frac{53\cdots 16}{21\cdots 19}a^{11}-\frac{10\cdots 05}{21\cdots 19}a^{10}+\frac{56\cdots 29}{21\cdots 19}a^{9}-\frac{92\cdots 78}{21\cdots 19}a^{8}+\frac{42\cdots 74}{21\cdots 19}a^{7}-\frac{55\cdots 32}{21\cdots 19}a^{6}+\frac{20\cdots 72}{21\cdots 19}a^{5}-\frac{20\cdots 26}{21\cdots 19}a^{4}+\frac{66\cdots 30}{21\cdots 19}a^{3}-\frac{40\cdots 13}{21\cdots 19}a^{2}+\frac{10\cdots 96}{21\cdots 19}a-\frac{48\cdots 14}{21\cdots 19}$, $\frac{25\cdots 76}{16\cdots 49}a^{19}+\frac{83\cdots 17}{21\cdots 19}a^{18}+\frac{16\cdots 86}{21\cdots 19}a^{17}+\frac{29\cdots 28}{21\cdots 19}a^{16}+\frac{41\cdots 53}{21\cdots 19}a^{15}+\frac{60\cdots 74}{21\cdots 19}a^{14}+\frac{66\cdots 73}{21\cdots 19}a^{13}+\frac{51\cdots 72}{11\cdots 01}a^{12}+\frac{78\cdots 13}{21\cdots 19}a^{11}+\frac{13\cdots 64}{21\cdots 19}a^{10}+\frac{72\cdots 91}{21\cdots 19}a^{9}+\frac{14\cdots 19}{21\cdots 19}a^{8}+\frac{52\cdots 95}{21\cdots 19}a^{7}+\frac{89\cdots 33}{21\cdots 19}a^{6}+\frac{32\cdots 44}{21\cdots 19}a^{5}+\frac{28\cdots 05}{21\cdots 19}a^{4}+\frac{16\cdots 17}{21\cdots 19}a^{3}+\frac{27\cdots 04}{21\cdots 19}a^{2}+\frac{37\cdots 90}{21\cdots 19}a-\frac{41\cdots 66}{21\cdots 19}$ 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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 140644.599182 \cdot 331922}{2\cdot\sqrt{193315443721344440894830801055908203125}}\cr\approx \mathstrut & 0.160988372888 \end{aligned}\] (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 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121) 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 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121, 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 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121); 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 + 61*x^18 - 97*x^17 + 1959*x^16 - 3824*x^15 + 42001*x^14 - 86676*x^13 + 651922*x^12 - 1272388*x^11 + 7455206*x^10 - 12647278*x^9 + 61958107*x^8 - 85243529*x^7 + 364805340*x^6 - 374838878*x^5 + 1487095911*x^4 - 973042478*x^3 + 3808215652*x^2 - 1149290321*x + 4751163121); 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

\(\Q(\sqrt{5}) \), \(\Q(\sqrt{-130 +26 \sqrt{5}})\), \(\Q(\zeta_{11})^+\), 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 $20$ $20$ R $20$ R R $20$ ${\href{/padicField/19.5.0.1}{5} }^{4}$ ${\href{/padicField/23.4.0.1}{4} }^{5}$ ${\href{/padicField/29.10.0.1}{10} }^{2}$ ${\href{/padicField/31.10.0.1}{10} }^{2}$ $20$ ${\href{/padicField/41.10.0.1}{10} }^{2}$ ${\href{/padicField/43.4.0.1}{4} }^{5}$ $20$ $20$ ${\href{/padicField/59.5.0.1}{5} }^{4}$

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
\(5\) 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}$$$[\ ]_{5}^{2}$$
\(13\) Copy content Toggle raw display 13.10.2.10a1.1$x^{20} + 14 x^{15} + 10 x^{14} + 16 x^{13} + 2 x^{12} + 2 x^{11} + 53 x^{10} + 70 x^{9} + 137 x^{8} + 94 x^{7} + 88 x^{6} + 54 x^{5} + 37 x^{4} + 34 x^{3} + 5 x^{2} + 17 x + 4$$2$$10$$10$20T1$$[\ ]_{2}^{10}$$

Spectrum of ring of integers

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