Properties

Label 20.0.100...125.1
Degree $20$
Signature $(0, 10)$
Discriminant $1.002\times 10^{34}$
Root discriminant \(50.12\)
Ramified primes $3,5,11$
Class number $3368$ (GRH)
Class group [2, 2, 842] (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 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901)
 
Copy content gp:K = bnfinit(y^20 - y^19 + 35*y^18 - 36*y^17 + 500*y^16 - 536*y^15 + 3874*y^14 - 4410*y^13 + 18734*y^12 - 23144*y^11 + 64285*y^10 - 88253*y^9 + 181094*y^8 - 254178*y^7 + 456689*y^6 - 492583*y^5 + 958226*y^4 - 411001*y^3 + 1371042*y^2 + 173262*y + 1197901, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - x^19 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - x^19 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901)
 

\( x^{20} - x^{19} + 35 x^{18} - 36 x^{17} + 500 x^{16} - 536 x^{15} + 3874 x^{14} - 4410 x^{13} + \cdots + 1197901 \) 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:   \(10019151533337487082567413330078125\) \(\medspace = 3^{10}\cdot 5^{15}\cdot 11^{18}\) 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:  \(50.12\)
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:  $3^{1/2}5^{3/4}11^{9/10}\approx 50.12351825429183$
Ramified primes:   \(3\), \(5\), \(11\) 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:  \(165=3\cdot 5\cdot 11\)
Dirichlet character group:    $\lbrace$$\chi_{165}(128,·)$, $\chi_{165}(1,·)$, $\chi_{165}(2,·)$, $\chi_{165}(4,·)$, $\chi_{165}(136,·)$, $\chi_{165}(98,·)$, $\chi_{165}(16,·)$, $\chi_{165}(17,·)$, $\chi_{165}(83,·)$, $\chi_{165}(68,·)$, $\chi_{165}(91,·)$, $\chi_{165}(31,·)$, $\chi_{165}(32,·)$, $\chi_{165}(34,·)$, $\chi_{165}(64,·)$, $\chi_{165}(107,·)$, $\chi_{165}(49,·)$, $\chi_{165}(8,·)$, $\chi_{165}(124,·)$, $\chi_{165}(62,·)$$\rbrace$
This is a CM field.
Reflex fields:  unavailable$^{512}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $\frac{1}{89}a^{15}+\frac{42}{89}a^{14}-\frac{14}{89}a^{13}-\frac{44}{89}a^{12}+\frac{5}{89}a^{11}-\frac{19}{89}a^{10}+\frac{14}{89}a^{9}-\frac{34}{89}a^{8}-\frac{41}{89}a^{7}-\frac{36}{89}a^{6}-\frac{31}{89}a^{4}+\frac{7}{89}a^{3}-\frac{32}{89}a^{2}-\frac{43}{89}a-\frac{6}{89}$, $\frac{1}{184141}a^{16}-\frac{851}{184141}a^{15}+\frac{61270}{184141}a^{14}+\frac{70308}{184141}a^{13}+\frac{5388}{184141}a^{12}+\frac{53188}{184141}a^{11}+\frac{8793}{184141}a^{10}+\frac{27959}{184141}a^{9}+\frac{49990}{184141}a^{8}+\frac{33106}{184141}a^{7}-\frac{47507}{184141}a^{6}+\frac{41888}{184141}a^{5}+\frac{10068}{184141}a^{4}-\frac{5304}{184141}a^{3}-\frac{56195}{184141}a^{2}+\frac{27713}{184141}a+\frac{75935}{184141}$, $\frac{1}{184141}a^{17}-\frac{851}{184141}a^{15}-\frac{82897}{184141}a^{14}-\frac{791}{2069}a^{13}-\frac{2391}{184141}a^{12}-\frac{31043}{184141}a^{11}+\frac{87230}{184141}a^{10}-\frac{33161}{184141}a^{9}-\frac{7493}{184141}a^{8}+\frac{59714}{184141}a^{7}+\frac{43760}{184141}a^{6}-\frac{66598}{184141}a^{5}+\frac{7249}{184141}a^{4}+\frac{64661}{184141}a^{3}+\frac{72083}{184141}a^{2}-\frac{22076}{184141}a+\frac{65816}{184141}$, $\frac{1}{184141}a^{18}-\frac{188}{184141}a^{15}-\frac{33256}{184141}a^{14}-\frac{80247}{184141}a^{13}-\frac{14207}{184141}a^{12}+\frac{34980}{184141}a^{11}+\frac{36455}{184141}a^{10}-\frac{88575}{184141}a^{9}+\frac{66702}{184141}a^{8}-\frac{78678}{184141}a^{7}+\frac{61483}{184141}a^{6}-\frac{69417}{184141}a^{5}+\frac{6868}{184141}a^{4}-\frac{82238}{184141}a^{3}-\frac{8741}{184141}a^{2}+\frac{909}{184141}a-\frac{66600}{184141}$, $\frac{1}{44\cdots 91}a^{19}-\frac{49\cdots 61}{44\cdots 91}a^{18}+\frac{53\cdots 29}{44\cdots 91}a^{17}+\frac{55\cdots 86}{44\cdots 91}a^{16}-\frac{19\cdots 18}{44\cdots 91}a^{15}+\frac{15\cdots 05}{44\cdots 91}a^{14}-\frac{72\cdots 17}{44\cdots 91}a^{13}-\frac{17\cdots 88}{44\cdots 91}a^{12}+\frac{47\cdots 19}{44\cdots 91}a^{11}+\frac{11\cdots 98}{44\cdots 91}a^{10}-\frac{20\cdots 47}{44\cdots 91}a^{9}+\frac{14\cdots 50}{44\cdots 91}a^{8}+\frac{12\cdots 10}{44\cdots 91}a^{7}-\frac{45\cdots 33}{44\cdots 91}a^{6}-\frac{17\cdots 71}{44\cdots 91}a^{5}+\frac{31\cdots 74}{44\cdots 91}a^{4}-\frac{11\cdots 39}{44\cdots 91}a^{3}-\frac{13\cdots 54}{44\cdots 91}a^{2}-\frac{17\cdots 75}{44\cdots 91}a-\frac{11\cdots 59}{36\cdots 91}$ 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:  $C_{2}\times C_{2}\times C_{842}$, which has order $3368$ (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:  $C_{2}\times C_{2}\times C_{842}$, which has order $3368$ (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:   $3368$ (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:   $\frac{65\cdots 51}{21\cdots 39}a^{19}-\frac{15\cdots 59}{21\cdots 39}a^{18}+\frac{33\cdots 01}{21\cdots 39}a^{17}-\frac{47\cdots 07}{21\cdots 39}a^{16}+\frac{72\cdots 61}{21\cdots 39}a^{15}-\frac{58\cdots 84}{21\cdots 39}a^{14}+\frac{85\cdots 00}{21\cdots 39}a^{13}-\frac{38\cdots 19}{21\cdots 39}a^{12}+\frac{57\cdots 82}{21\cdots 39}a^{11}-\frac{15\cdots 18}{21\cdots 39}a^{10}+\frac{23\cdots 58}{21\cdots 39}a^{9}-\frac{45\cdots 76}{21\cdots 39}a^{8}+\frac{71\cdots 31}{21\cdots 39}a^{7}-\frac{11\cdots 00}{21\cdots 39}a^{6}+\frac{16\cdots 90}{21\cdots 39}a^{5}-\frac{27\cdots 91}{21\cdots 39}a^{4}+\frac{20\cdots 51}{21\cdots 39}a^{3}-\frac{39\cdots 52}{21\cdots 39}a^{2}-\frac{26\cdots 10}{21\cdots 39}a-\frac{93\cdots 05}{17\cdots 39}$, $\frac{25\cdots 25}{65\cdots 99}a^{19}+\frac{62\cdots 05}{65\cdots 99}a^{18}+\frac{12\cdots 80}{65\cdots 99}a^{17}+\frac{81\cdots 10}{65\cdots 99}a^{16}+\frac{25\cdots 00}{65\cdots 99}a^{15}-\frac{10\cdots 55}{65\cdots 99}a^{14}+\frac{24\cdots 85}{65\cdots 99}a^{13}-\frac{24\cdots 65}{65\cdots 99}a^{12}+\frac{12\cdots 50}{65\cdots 99}a^{11}-\frac{16\cdots 04}{65\cdots 99}a^{10}+\frac{41\cdots 55}{65\cdots 99}a^{9}-\frac{58\cdots 40}{65\cdots 99}a^{8}+\frac{10\cdots 95}{65\cdots 99}a^{7}-\frac{16\cdots 20}{65\cdots 99}a^{6}+\frac{28\cdots 06}{65\cdots 99}a^{5}-\frac{29\cdots 65}{65\cdots 99}a^{4}+\frac{60\cdots 10}{65\cdots 99}a^{3}+\frac{73\cdots 30}{65\cdots 99}a^{2}+\frac{62\cdots 50}{65\cdots 99}a+\frac{46\cdots 09}{54\cdots 99}$, $\frac{99\cdots 06}{65\cdots 99}a^{19}+\frac{26\cdots 60}{65\cdots 99}a^{18}+\frac{27\cdots 01}{65\cdots 99}a^{17}+\frac{78\cdots 30}{65\cdots 99}a^{16}+\frac{27\cdots 52}{65\cdots 99}a^{15}+\frac{89\cdots 46}{65\cdots 99}a^{14}+\frac{92\cdots 30}{65\cdots 99}a^{13}+\frac{49\cdots 41}{65\cdots 99}a^{12}-\frac{12\cdots 71}{65\cdots 99}a^{11}+\frac{16\cdots 72}{65\cdots 99}a^{10}-\frac{16\cdots 47}{65\cdots 99}a^{9}+\frac{47\cdots 16}{65\cdots 99}a^{8}-\frac{57\cdots 92}{65\cdots 99}a^{7}+\frac{15\cdots 91}{65\cdots 99}a^{6}-\frac{14\cdots 50}{65\cdots 99}a^{5}+\frac{44\cdots 39}{65\cdots 99}a^{4}-\frac{14\cdots 44}{65\cdots 99}a^{3}+\frac{76\cdots 08}{65\cdots 99}a^{2}+\frac{25\cdots 93}{65\cdots 99}a+\frac{35\cdots 19}{54\cdots 99}$, $\frac{11\cdots 11}{73\cdots 91}a^{19}-\frac{35\cdots 60}{73\cdots 91}a^{18}+\frac{38\cdots 01}{73\cdots 91}a^{17}-\frac{11\cdots 35}{73\cdots 91}a^{16}+\frac{54\cdots 22}{73\cdots 91}a^{15}-\frac{13\cdots 69}{73\cdots 91}a^{14}+\frac{46\cdots 10}{82\cdots 19}a^{13}-\frac{85\cdots 74}{73\cdots 91}a^{12}+\frac{19\cdots 14}{73\cdots 91}a^{11}-\frac{35\cdots 43}{73\cdots 91}a^{10}+\frac{67\cdots 98}{73\cdots 91}a^{9}-\frac{11\cdots 14}{73\cdots 91}a^{8}+\frac{18\cdots 38}{73\cdots 91}a^{7}-\frac{29\cdots 59}{73\cdots 91}a^{6}+\frac{42\cdots 41}{73\cdots 91}a^{5}-\frac{51\cdots 66}{73\cdots 91}a^{4}+\frac{71\cdots 56}{73\cdots 91}a^{3}-\frac{36\cdots 02}{73\cdots 91}a^{2}+\frac{42\cdots 58}{73\cdots 91}a+\frac{28\cdots 35}{61\cdots 91}$, $\frac{11\cdots 11}{73\cdots 91}a^{19}-\frac{35\cdots 60}{73\cdots 91}a^{18}+\frac{38\cdots 01}{73\cdots 91}a^{17}-\frac{11\cdots 35}{73\cdots 91}a^{16}+\frac{54\cdots 22}{73\cdots 91}a^{15}-\frac{13\cdots 69}{73\cdots 91}a^{14}+\frac{46\cdots 10}{82\cdots 19}a^{13}-\frac{85\cdots 74}{73\cdots 91}a^{12}+\frac{19\cdots 14}{73\cdots 91}a^{11}-\frac{35\cdots 43}{73\cdots 91}a^{10}+\frac{67\cdots 98}{73\cdots 91}a^{9}-\frac{11\cdots 14}{73\cdots 91}a^{8}+\frac{18\cdots 38}{73\cdots 91}a^{7}-\frac{29\cdots 59}{73\cdots 91}a^{6}+\frac{42\cdots 41}{73\cdots 91}a^{5}-\frac{51\cdots 66}{73\cdots 91}a^{4}+\frac{71\cdots 56}{73\cdots 91}a^{3}-\frac{36\cdots 02}{73\cdots 91}a^{2}+\frac{42\cdots 58}{73\cdots 91}a-\frac{32\cdots 56}{61\cdots 91}$, $\frac{19\cdots 03}{44\cdots 91}a^{19}-\frac{19\cdots 67}{44\cdots 91}a^{18}+\frac{68\cdots 40}{44\cdots 91}a^{17}-\frac{68\cdots 32}{44\cdots 91}a^{16}+\frac{96\cdots 19}{44\cdots 91}a^{15}-\frac{98\cdots 86}{44\cdots 91}a^{14}+\frac{72\cdots 43}{44\cdots 91}a^{13}-\frac{76\cdots 88}{44\cdots 91}a^{12}+\frac{33\cdots 12}{44\cdots 91}a^{11}-\frac{37\cdots 49}{44\cdots 91}a^{10}+\frac{10\cdots 42}{44\cdots 91}a^{9}-\frac{13\cdots 32}{44\cdots 91}a^{8}+\frac{26\cdots 98}{44\cdots 91}a^{7}-\frac{37\cdots 41}{44\cdots 91}a^{6}+\frac{64\cdots 44}{44\cdots 91}a^{5}-\frac{57\cdots 86}{44\cdots 91}a^{4}+\frac{13\cdots 13}{44\cdots 91}a^{3}+\frac{16\cdots 55}{44\cdots 91}a^{2}+\frac{12\cdots 36}{44\cdots 91}a+\frac{13\cdots 11}{36\cdots 91}$, $\frac{42\cdots 87}{44\cdots 91}a^{19}-\frac{13\cdots 69}{44\cdots 91}a^{18}+\frac{14\cdots 72}{44\cdots 91}a^{17}-\frac{45\cdots 52}{44\cdots 91}a^{16}+\frac{20\cdots 32}{44\cdots 91}a^{15}-\frac{59\cdots 48}{44\cdots 91}a^{14}+\frac{15\cdots 80}{44\cdots 91}a^{13}-\frac{41\cdots 43}{44\cdots 91}a^{12}+\frac{70\cdots 96}{44\cdots 91}a^{11}-\frac{17\cdots 27}{44\cdots 91}a^{10}+\frac{24\cdots 41}{44\cdots 91}a^{9}-\frac{55\cdots 85}{44\cdots 91}a^{8}+\frac{78\cdots 29}{44\cdots 91}a^{7}-\frac{14\cdots 89}{44\cdots 91}a^{6}+\frac{20\cdots 33}{44\cdots 91}a^{5}-\frac{29\cdots 27}{44\cdots 91}a^{4}+\frac{33\cdots 42}{44\cdots 91}a^{3}-\frac{30\cdots 64}{44\cdots 91}a^{2}+\frac{13\cdots 48}{44\cdots 91}a+\frac{28\cdots 12}{36\cdots 91}$, $\frac{41\cdots 81}{44\cdots 91}a^{19}-\frac{44\cdots 40}{44\cdots 91}a^{18}+\frac{14\cdots 24}{44\cdots 91}a^{17}-\frac{14\cdots 80}{44\cdots 91}a^{16}+\frac{19\cdots 79}{44\cdots 91}a^{15}-\frac{19\cdots 24}{44\cdots 91}a^{14}+\frac{14\cdots 10}{44\cdots 91}a^{13}-\frac{14\cdots 86}{44\cdots 91}a^{12}+\frac{63\cdots 17}{44\cdots 91}a^{11}-\frac{76\cdots 07}{44\cdots 91}a^{10}+\frac{18\cdots 68}{44\cdots 91}a^{9}-\frac{30\cdots 53}{44\cdots 91}a^{8}+\frac{40\cdots 87}{44\cdots 91}a^{7}-\frac{80\cdots 03}{44\cdots 91}a^{6}+\frac{10\cdots 66}{44\cdots 91}a^{5}-\frac{82\cdots 86}{44\cdots 91}a^{4}+\frac{28\cdots 67}{44\cdots 91}a^{3}+\frac{19\cdots 25}{44\cdots 91}a^{2}+\frac{37\cdots 43}{44\cdots 91}a+\frac{18\cdots 65}{36\cdots 91}$, $\frac{27\cdots 03}{44\cdots 91}a^{19}-\frac{16\cdots 02}{44\cdots 91}a^{18}+\frac{88\cdots 33}{44\cdots 91}a^{17}-\frac{47\cdots 41}{44\cdots 91}a^{16}+\frac{11\cdots 58}{44\cdots 91}a^{15}-\frac{50\cdots 27}{44\cdots 91}a^{14}+\frac{87\cdots 96}{44\cdots 91}a^{13}-\frac{26\cdots 02}{44\cdots 91}a^{12}+\frac{45\cdots 32}{44\cdots 91}a^{11}-\frac{81\cdots 83}{44\cdots 91}a^{10}+\frac{17\cdots 57}{44\cdots 91}a^{9}-\frac{23\cdots 48}{44\cdots 91}a^{8}+\frac{50\cdots 40}{44\cdots 91}a^{7}-\frac{53\cdots 45}{44\cdots 91}a^{6}+\frac{79\cdots 39}{44\cdots 91}a^{5}-\frac{11\cdots 63}{44\cdots 91}a^{4}+\frac{45\cdots 22}{44\cdots 91}a^{3}-\frac{24\cdots 01}{44\cdots 91}a^{2}-\frac{11\cdots 48}{44\cdots 91}a+\frac{14\cdots 04}{36\cdots 91}$ 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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 140644.599182 \cdot 3368}{2\cdot\sqrt{10019151533337487082567413330078125}}\cr\approx \mathstrut & 0.226907242423 \end{aligned}\] (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 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901) 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 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901, 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 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901); 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 + 35*x^18 - 36*x^17 + 500*x^16 - 536*x^15 + 3874*x^14 - 4410*x^13 + 18734*x^12 - 23144*x^11 + 64285*x^10 - 88253*x^9 + 181094*x^8 - 254178*x^7 + 456689*x^6 - 492583*x^5 + 958226*x^4 - 411001*x^3 + 1371042*x^2 + 173262*x + 1197901); 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

\(\Q(\sqrt{5}) \), \(\Q(\sqrt{-330 +66 \sqrt{5}})\), \(\Q(\zeta_{11})^+\), 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 $20$ R R $20$ R $20$ $20$ ${\href{/padicField/19.5.0.1}{5} }^{4}$ ${\href{/padicField/23.4.0.1}{4} }^{5}$ ${\href{/padicField/29.10.0.1}{10} }^{2}$ ${\href{/padicField/31.5.0.1}{5} }^{4}$ $20$ ${\href{/padicField/41.5.0.1}{5} }^{4}$ ${\href{/padicField/43.4.0.1}{4} }^{5}$ $20$ $20$ ${\href{/padicField/59.5.0.1}{5} }^{4}$

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
\(3\) Copy content Toggle raw display 3.10.2.10a1.1$x^{20} + 4 x^{16} + 4 x^{15} + 4 x^{14} + 4 x^{12} + 10 x^{11} + 16 x^{10} + 8 x^{9} + 4 x^{8} + 4 x^{7} + 12 x^{6} + 12 x^{5} + 8 x^{4} + x^{2} + 7 x + 4$$2$$10$$10$20T1$$[\ ]_{2}^{10}$$
\(5\) 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 11.1.10.9a1.10$x^{10} + 110$$10$$1$$9$$C_{10}$$$[\ ]_{10}$$
11.1.10.9a1.10$x^{10} + 110$$10$$1$$9$$C_{10}$$$[\ ]_{10}$$

Spectrum of ring of integers

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