Properties

Label 20.0.388...000.1
Degree $20$
Signature $(0, 10)$
Discriminant $3.882\times 10^{41}$
Root discriminant \(120.08\)
Ramified primes $2,5,7$
Class number $4$ (GRH)
Class group [4] (GRH)
Galois group $C_2^8.(F_5\times S_4)$ (as 20T811)

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Show commands: Magma / Oscar / Pari/GP / SageMath

Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^20 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156)
 
Copy content gp:K = bnfinit(y^20 - 40*y^17 + 500*y^16 + 4208*y^15 + 22860*y^14 + 89480*y^13 + 347650*y^12 + 1383720*y^11 + 5121684*y^10 + 15240040*y^9 + 34578120*y^8 + 57142880*y^7 + 70268380*y^6 + 71884872*y^5 + 72196265*y^4 + 62435320*y^3 + 40912340*y^2 + 18112880*y + 3773156, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156)
 

\( x^{20} - 40 x^{17} + 500 x^{16} + 4208 x^{15} + 22860 x^{14} + 89480 x^{13} + 347650 x^{12} + \cdots + 3773156 \) 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:   \(388231026043026145280000000000000000000000\) \(\medspace = 2^{59}\cdot 5^{22}\cdot 7^{10}\) 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:  \(120.08\)
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:  not computed
Ramified primes:   \(2\), \(5\), \(7\) 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:  \(\Q(\sqrt{2}) \)
$\Aut(K/\Q)$:   $C_1$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $\frac{1}{5}a^{8}+\frac{1}{5}a^{7}+\frac{2}{5}a^{6}-\frac{2}{5}a^{5}+\frac{2}{5}a^{3}+\frac{2}{5}a^{2}-\frac{1}{5}a+\frac{1}{5}$, $\frac{1}{5}a^{9}+\frac{1}{5}a^{7}+\frac{1}{5}a^{6}+\frac{2}{5}a^{5}+\frac{2}{5}a^{4}+\frac{2}{5}a^{2}+\frac{2}{5}a-\frac{1}{5}$, $\frac{1}{20}a^{10}-\frac{1}{10}a^{8}+\frac{2}{5}a^{7}+\frac{3}{10}a^{6}+\frac{2}{5}a^{5}-\frac{1}{5}a^{3}-\frac{9}{20}a^{2}-\frac{2}{5}a+\frac{1}{10}$, $\frac{1}{20}a^{11}-\frac{1}{10}a^{9}-\frac{1}{10}a^{7}-\frac{2}{5}a^{6}-\frac{1}{5}a^{5}-\frac{1}{5}a^{4}-\frac{1}{4}a^{3}-\frac{1}{5}a^{2}-\frac{1}{2}a-\frac{2}{5}$, $\frac{1}{20}a^{12}-\frac{1}{10}a^{8}-\frac{2}{5}a^{7}-\frac{1}{5}a^{6}+\frac{1}{5}a^{5}-\frac{1}{4}a^{4}-\frac{1}{5}a^{3}-\frac{2}{5}a+\frac{2}{5}$, $\frac{1}{20}a^{13}-\frac{1}{10}a^{9}+\frac{1}{5}a^{7}-\frac{1}{20}a^{5}-\frac{1}{5}a^{4}-\frac{1}{5}a^{3}+\frac{2}{5}a^{2}+\frac{2}{5}$, $\frac{1}{20}a^{14}-\frac{1}{5}a^{7}-\frac{9}{20}a^{6}-\frac{2}{5}a^{5}-\frac{1}{5}a^{4}+\frac{1}{10}a^{2}-\frac{2}{5}a+\frac{1}{5}$, $\frac{1}{100}a^{15}+\frac{1}{100}a^{10}-\frac{1}{10}a^{8}+\frac{3}{20}a^{7}+\frac{3}{10}a^{6}+\frac{3}{25}a^{5}+\frac{3}{10}a^{3}-\frac{9}{20}a^{2}-\frac{2}{5}a-\frac{11}{50}$, $\frac{1}{100}a^{16}+\frac{1}{100}a^{11}-\frac{1}{10}a^{9}-\frac{1}{20}a^{8}+\frac{1}{10}a^{7}-\frac{7}{25}a^{6}+\frac{2}{5}a^{5}+\frac{3}{10}a^{4}+\frac{3}{20}a^{3}+\frac{1}{5}a^{2}-\frac{1}{50}a-\frac{1}{5}$, $\frac{1}{100}a^{17}+\frac{1}{100}a^{12}-\frac{1}{20}a^{9}-\frac{1}{10}a^{8}-\frac{12}{25}a^{7}+\frac{1}{10}a^{5}+\frac{3}{20}a^{4}-\frac{1}{5}a^{3}+\frac{2}{25}a^{2}+\frac{1}{5}$, $\frac{1}{100}a^{18}+\frac{1}{100}a^{13}-\frac{1}{10}a^{9}+\frac{1}{50}a^{8}-\frac{2}{5}a^{6}+\frac{7}{20}a^{5}-\frac{1}{5}a^{4}+\frac{2}{25}a^{3}-\frac{1}{4}a^{2}+\frac{1}{5}a-\frac{3}{10}$, $\frac{1}{52\cdots 00}a^{19}+\frac{15\cdots 73}{66\cdots 75}a^{18}+\frac{27\cdots 83}{13\cdots 50}a^{17}-\frac{13\cdots 94}{66\cdots 75}a^{16}+\frac{43\cdots 66}{66\cdots 75}a^{15}-\frac{55\cdots 47}{26\cdots 00}a^{14}-\frac{88\cdots 72}{66\cdots 75}a^{13}-\frac{13\cdots 09}{26\cdots 00}a^{12}-\frac{14\cdots 13}{13\cdots 50}a^{11}+\frac{76\cdots 67}{13\cdots 50}a^{10}-\frac{87\cdots 29}{26\cdots 00}a^{9}-\frac{99\cdots 63}{13\cdots 50}a^{8}+\frac{11\cdots 71}{13\cdots 50}a^{7}-\frac{76\cdots 17}{26\cdots 00}a^{6}-\frac{61\cdots 81}{13\cdots 50}a^{5}-\frac{55\cdots 91}{26\cdots 00}a^{4}-\frac{56\cdots 53}{52\cdots 00}a^{3}-\frac{24\cdots 88}{66\cdots 75}a^{2}-\frac{69\cdots 13}{26\cdots 00}a-\frac{22\cdots 37}{66\cdots 75}$ 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:  $C_{4}$, which has order $4$ (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:  $C_{4}$, which has order $4$ (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:  $9$
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:   $\frac{12\cdots 11}{13\cdots 50}a^{19}-\frac{61\cdots 29}{10\cdots 24}a^{18}+\frac{10\cdots 67}{26\cdots 10}a^{17}-\frac{48\cdots 69}{13\cdots 50}a^{16}+\frac{31\cdots 08}{66\cdots 75}a^{15}+\frac{93\cdots 27}{26\cdots 00}a^{14}+\frac{49\cdots 87}{26\cdots 10}a^{13}+\frac{37\cdots 29}{52\cdots 20}a^{12}+\frac{36\cdots 21}{13\cdots 50}a^{11}+\frac{28\cdots 67}{26\cdots 00}a^{10}+\frac{52\cdots 87}{13\cdots 50}a^{9}+\frac{15\cdots 01}{13\cdots 55}a^{8}+\frac{32\cdots 83}{13\cdots 55}a^{7}+\frac{98\cdots 59}{26\cdots 00}a^{6}+\frac{54\cdots 07}{13\cdots 50}a^{5}+\frac{10\cdots 91}{26\cdots 00}a^{4}+\frac{54\cdots 08}{13\cdots 55}a^{3}+\frac{83\cdots 54}{26\cdots 31}a^{2}+\frac{12\cdots 74}{66\cdots 75}a+\frac{36\cdots 54}{66\cdots 75}$, $\frac{17\cdots 61}{26\cdots 10}a^{19}-\frac{10\cdots 76}{26\cdots 31}a^{18}+\frac{19\cdots 21}{66\cdots 75}a^{17}-\frac{13\cdots 71}{52\cdots 20}a^{16}+\frac{44\cdots 27}{13\cdots 50}a^{15}+\frac{33\cdots 88}{13\cdots 55}a^{14}+\frac{17\cdots 67}{13\cdots 55}a^{13}+\frac{13\cdots 19}{26\cdots 00}a^{12}+\frac{51\cdots 41}{26\cdots 10}a^{11}+\frac{51\cdots 31}{66\cdots 75}a^{10}+\frac{37\cdots 93}{13\cdots 55}a^{9}+\frac{42\cdots 41}{52\cdots 20}a^{8}+\frac{22\cdots 39}{13\cdots 50}a^{7}+\frac{34\cdots 94}{13\cdots 55}a^{6}+\frac{19\cdots 47}{66\cdots 75}a^{5}+\frac{15\cdots 27}{52\cdots 20}a^{4}+\frac{77\cdots 72}{26\cdots 31}a^{3}+\frac{14\cdots 63}{66\cdots 75}a^{2}+\frac{17\cdots 44}{13\cdots 55}a+\frac{26\cdots 78}{66\cdots 75}$, $\frac{39\cdots 09}{26\cdots 00}a^{19}+\frac{14\cdots 49}{13\cdots 50}a^{18}-\frac{31\cdots 03}{26\cdots 00}a^{17}-\frac{15\cdots 61}{26\cdots 00}a^{16}+\frac{39\cdots 61}{52\cdots 20}a^{15}+\frac{16\cdots 99}{26\cdots 00}a^{14}+\frac{22\cdots 47}{66\cdots 75}a^{13}+\frac{85\cdots 28}{66\cdots 75}a^{12}+\frac{13\cdots 99}{26\cdots 00}a^{11}+\frac{52\cdots 29}{26\cdots 10}a^{10}+\frac{19\cdots 83}{26\cdots 00}a^{9}+\frac{57\cdots 61}{26\cdots 00}a^{8}+\frac{12\cdots 89}{26\cdots 00}a^{7}+\frac{19\cdots 93}{26\cdots 00}a^{6}+\frac{22\cdots 17}{26\cdots 10}a^{5}+\frac{10\cdots 21}{13\cdots 50}a^{4}+\frac{11\cdots 27}{13\cdots 50}a^{3}+\frac{86\cdots 03}{13\cdots 50}a^{2}+\frac{24\cdots 63}{66\cdots 75}a+\frac{15\cdots 16}{13\cdots 55}$, $\frac{31\cdots 97}{26\cdots 10}a^{19}-\frac{18\cdots 11}{52\cdots 20}a^{18}+\frac{36\cdots 57}{52\cdots 20}a^{17}-\frac{75\cdots 39}{13\cdots 50}a^{16}+\frac{19\cdots 69}{26\cdots 00}a^{15}+\frac{15\cdots 19}{52\cdots 20}a^{14}+\frac{86\cdots 69}{52\cdots 20}a^{13}+\frac{13\cdots 81}{26\cdots 31}a^{12}+\frac{58\cdots 47}{26\cdots 00}a^{11}+\frac{23\cdots 49}{26\cdots 00}a^{10}+\frac{15\cdots 39}{52\cdots 20}a^{9}+\frac{19\cdots 43}{26\cdots 10}a^{8}+\frac{13\cdots 73}{10\cdots 24}a^{7}+\frac{37\cdots 59}{26\cdots 00}a^{6}+\frac{39\cdots 73}{26\cdots 00}a^{5}+\frac{20\cdots 56}{13\cdots 55}a^{4}+\frac{67\cdots 93}{52\cdots 20}a^{3}+\frac{10\cdots 34}{13\cdots 55}a^{2}+\frac{39\cdots 03}{13\cdots 50}a+\frac{30\cdots 63}{66\cdots 75}$, $\frac{88\cdots 99}{52\cdots 20}a^{19}-\frac{35\cdots 31}{26\cdots 00}a^{18}+\frac{69\cdots 69}{66\cdots 75}a^{17}-\frac{44\cdots 64}{66\cdots 75}a^{16}+\frac{58\cdots 54}{66\cdots 75}a^{15}+\frac{66\cdots 71}{10\cdots 24}a^{14}+\frac{87\cdots 69}{26\cdots 00}a^{13}+\frac{81\cdots 19}{66\cdots 75}a^{12}+\frac{63\cdots 27}{13\cdots 50}a^{11}+\frac{50\cdots 01}{26\cdots 00}a^{10}+\frac{92\cdots 01}{13\cdots 55}a^{9}+\frac{13\cdots 62}{66\cdots 75}a^{8}+\frac{27\cdots 38}{66\cdots 75}a^{7}+\frac{16\cdots 23}{26\cdots 00}a^{6}+\frac{17\cdots 07}{26\cdots 00}a^{5}+\frac{17\cdots 12}{26\cdots 31}a^{4}+\frac{17\cdots 47}{26\cdots 00}a^{3}+\frac{32\cdots 52}{66\cdots 75}a^{2}+\frac{36\cdots 91}{13\cdots 50}a+\frac{48\cdots 97}{66\cdots 75}$, $\frac{38\cdots 51}{52\cdots 20}a^{19}-\frac{92\cdots 91}{52\cdots 20}a^{18}+\frac{20\cdots 19}{66\cdots 75}a^{17}-\frac{84\cdots 01}{26\cdots 00}a^{16}+\frac{11\cdots 09}{26\cdots 00}a^{15}+\frac{55\cdots 03}{26\cdots 10}a^{14}+\frac{57\cdots 05}{52\cdots 62}a^{13}+\frac{97\cdots 31}{26\cdots 00}a^{12}+\frac{39\cdots 69}{26\cdots 00}a^{11}+\frac{16\cdots 99}{26\cdots 00}a^{10}+\frac{27\cdots 46}{13\cdots 55}a^{9}+\frac{56\cdots 95}{10\cdots 24}a^{8}+\frac{26\cdots 37}{26\cdots 00}a^{7}+\frac{81\cdots 82}{66\cdots 75}a^{6}+\frac{16\cdots 89}{13\cdots 50}a^{5}+\frac{69\cdots 87}{52\cdots 20}a^{4}+\frac{31\cdots 11}{26\cdots 10}a^{3}+\frac{52\cdots 02}{66\cdots 75}a^{2}+\frac{23\cdots 18}{66\cdots 75}a+\frac{48\cdots 58}{66\cdots 75}$, $\frac{21\cdots 87}{13\cdots 50}a^{19}+\frac{42\cdots 33}{66\cdots 75}a^{18}-\frac{43\cdots 62}{66\cdots 75}a^{17}-\frac{18\cdots 73}{26\cdots 00}a^{16}+\frac{21\cdots 63}{26\cdots 00}a^{15}+\frac{19\cdots 69}{26\cdots 00}a^{14}+\frac{10\cdots 87}{26\cdots 00}a^{13}+\frac{42\cdots 07}{26\cdots 00}a^{12}+\frac{16\cdots 77}{26\cdots 00}a^{11}+\frac{63\cdots 93}{26\cdots 00}a^{10}+\frac{59\cdots 02}{66\cdots 75}a^{9}+\frac{71\cdots 29}{26\cdots 00}a^{8}+\frac{16\cdots 39}{26\cdots 00}a^{7}+\frac{25\cdots 09}{26\cdots 00}a^{6}+\frac{25\cdots 01}{26\cdots 00}a^{5}+\frac{13\cdots 07}{26\cdots 00}a^{4}-\frac{42\cdots 09}{26\cdots 00}a^{3}-\frac{60\cdots 59}{26\cdots 00}a^{2}-\frac{21\cdots 87}{13\cdots 50}a-\frac{54\cdots 83}{13\cdots 50}$, $\frac{38\cdots 57}{26\cdots 00}a^{19}-\frac{25\cdots 79}{13\cdots 55}a^{18}+\frac{30\cdots 89}{26\cdots 00}a^{17}-\frac{73\cdots 59}{13\cdots 55}a^{16}+\frac{21\cdots 17}{26\cdots 00}a^{15}+\frac{13\cdots 37}{26\cdots 00}a^{14}+\frac{33\cdots 42}{13\cdots 55}a^{13}+\frac{24\cdots 69}{26\cdots 00}a^{12}+\frac{96\cdots 79}{26\cdots 10}a^{11}+\frac{19\cdots 01}{13\cdots 50}a^{10}+\frac{13\cdots 09}{26\cdots 00}a^{9}+\frac{37\cdots 93}{26\cdots 10}a^{8}+\frac{74\cdots 63}{26\cdots 00}a^{7}+\frac{20\cdots 87}{52\cdots 20}a^{6}+\frac{51\cdots 37}{13\cdots 50}a^{5}+\frac{10\cdots 51}{26\cdots 00}a^{4}+\frac{20\cdots 27}{52\cdots 20}a^{3}+\frac{17\cdots 03}{66\cdots 75}a^{2}+\frac{34\cdots 27}{26\cdots 10}a+\frac{19\cdots 44}{66\cdots 75}$, $\frac{70\cdots 67}{10\cdots 24}a^{19}-\frac{98\cdots 33}{13\cdots 50}a^{18}-\frac{15\cdots 57}{26\cdots 00}a^{17}-\frac{13\cdots 07}{66\cdots 75}a^{16}+\frac{89\cdots 39}{26\cdots 00}a^{15}+\frac{33\cdots 28}{13\cdots 55}a^{14}+\frac{14\cdots 87}{13\cdots 50}a^{13}+\frac{58\cdots 89}{13\cdots 50}a^{12}+\frac{21\cdots 91}{13\cdots 50}a^{11}+\frac{45\cdots 06}{66\cdots 75}a^{10}+\frac{12\cdots 59}{52\cdots 20}a^{9}+\frac{43\cdots 67}{66\cdots 75}a^{8}+\frac{33\cdots 81}{26\cdots 00}a^{7}+\frac{11\cdots 51}{66\cdots 75}a^{6}+\frac{11\cdots 57}{66\cdots 75}a^{5}+\frac{97\cdots 79}{52\cdots 62}a^{4}+\frac{45\cdots 37}{26\cdots 00}a^{3}+\frac{16\cdots 47}{13\cdots 50}a^{2}+\frac{78\cdots 03}{13\cdots 50}a+\frac{89\cdots 18}{66\cdots 75}$ 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:  \( 3399389331400 \) (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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 3399389331400 \cdot 4}{2\cdot\sqrt{388231026043026145280000000000000000000000}}\cr\approx \mathstrut & 1.04636804067995 \end{aligned}\] (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 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156) 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 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156, 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 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156); 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 - 40*x^17 + 500*x^16 + 4208*x^15 + 22860*x^14 + 89480*x^13 + 347650*x^12 + 1383720*x^11 + 5121684*x^10 + 15240040*x^9 + 34578120*x^8 + 57142880*x^7 + 70268380*x^6 + 71884872*x^5 + 72196265*x^4 + 62435320*x^3 + 40912340*x^2 + 18112880*x + 3773156); 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

$C_2^8.(F_5\times S_4)$ (as 20T811):

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 solvable group of order 122880
The 80 conjugacy class representatives for $C_2^8.(F_5\times S_4)$
Character table for $C_2^8.(F_5\times S_4)$

Intermediate fields

5.1.200000.1

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]
 

Sibling fields

Degree 30 siblings: data not computed
Degree 40 siblings: 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 R ${\href{/padicField/3.8.0.1}{8} }^{2}{,}\,{\href{/padicField/3.4.0.1}{4} }$ R R ${\href{/padicField/11.4.0.1}{4} }^{4}{,}\,{\href{/padicField/11.2.0.1}{2} }{,}\,{\href{/padicField/11.1.0.1}{1} }^{2}$ ${\href{/padicField/13.8.0.1}{8} }^{2}{,}\,{\href{/padicField/13.4.0.1}{4} }$ ${\href{/padicField/17.12.0.1}{12} }{,}\,{\href{/padicField/17.4.0.1}{4} }{,}\,{\href{/padicField/17.3.0.1}{3} }{,}\,{\href{/padicField/17.1.0.1}{1} }$ $20$ ${\href{/padicField/23.12.0.1}{12} }{,}\,{\href{/padicField/23.4.0.1}{4} }{,}\,{\href{/padicField/23.3.0.1}{3} }{,}\,{\href{/padicField/23.1.0.1}{1} }$ ${\href{/padicField/29.10.0.1}{10} }{,}\,{\href{/padicField/29.5.0.1}{5} }^{2}$ $15{,}\,{\href{/padicField/31.5.0.1}{5} }$ ${\href{/padicField/37.8.0.1}{8} }^{2}{,}\,{\href{/padicField/37.2.0.1}{2} }{,}\,{\href{/padicField/37.1.0.1}{1} }^{2}$ $15{,}\,{\href{/padicField/41.5.0.1}{5} }$ ${\href{/padicField/43.8.0.1}{8} }^{2}{,}\,{\href{/padicField/43.2.0.1}{2} }{,}\,{\href{/padicField/43.1.0.1}{1} }^{2}$ ${\href{/padicField/47.12.0.1}{12} }{,}\,{\href{/padicField/47.4.0.1}{4} }{,}\,{\href{/padicField/47.3.0.1}{3} }{,}\,{\href{/padicField/47.1.0.1}{1} }$ ${\href{/padicField/53.4.0.1}{4} }^{5}$ $20$

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 2.1.4.11a1.10$x^{4} + 4 x^{2} + 18$$4$$1$$11$$C_4$$$[3, 4]$$
2.2.8.48b6.49$x^{16} + 8 x^{15} + 40 x^{14} + 144 x^{13} + 406 x^{12} + 920 x^{11} + 1716 x^{10} + 2664 x^{9} + 3475 x^{8} + 3816 x^{7} + 3524 x^{6} + 2712 x^{5} + 1714 x^{4} + 872 x^{3} + 348 x^{2} + 112 x + 23$$8$$2$$48$16T863$$[2, 2, 2, 3, \frac{7}{2}, \frac{7}{2}, \frac{7}{2}]^{4}$$
\(5\) Copy content Toggle raw display 5.1.5.5a1.4$x^{5} + 20 x + 5$$5$$1$$5$$F_5$$$[\frac{5}{4}]_{4}$$
5.1.15.17a1.4$x^{15} + 20 x^{3} + 5$$15$$1$$17$$F_5 \times S_3$$$[\frac{5}{4}]_{12}^{2}$$
\(7\) Copy content Toggle raw display $\Q_{7}$$x + 4$$1$$1$$0$Trivial$$[\ ]$$
7.1.3.2a1.3$x^{3} + 21$$3$$1$$2$$C_3$$$[\ ]_{3}$$
7.4.1.0a1.1$x^{4} + 5 x^{2} + 4 x + 3$$1$$4$$0$$C_4$$$[\ ]^{4}$$
7.4.3.8a1.2$x^{12} + 15 x^{10} + 12 x^{9} + 84 x^{8} + 120 x^{7} + 263 x^{6} + 372 x^{5} + 492 x^{4} + 424 x^{3} + 279 x^{2} + 115 x + 27$$3$$4$$8$$C_{12}$$$[\ ]_{3}^{4}$$

Spectrum of ring of integers

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