Properties

Label 20.0.511...272.1
Degree $20$
Signature $(0, 10)$
Discriminant $5.117\times 10^{48}$
Root discriminant \(272.55\)
Ramified primes $2,7,11,13$
Class number $128$ (GRH)
Class group [2, 4, 16] (GRH)
Galois group $C_{20}:C_4$ (as 20T18)

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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 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978)
 
Copy content gp:K = bnfinit(y^20 - 6*y^19 + 216*y^18 - 1093*y^17 + 19018*y^16 - 81544*y^15 + 888786*y^14 - 3200544*y^13 + 23877802*y^12 - 70647150*y^11 + 372810412*y^10 - 881542622*y^9 + 3311764471*y^8 - 6211478090*y^7 + 16546960658*y^6 - 25919041653*y^5 + 47528976126*y^4 - 62448845622*y^3 + 68366421642*y^2 - 54399144116*y + 21376757978, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978)
 

\( x^{20} - 6 x^{19} + 216 x^{18} - 1093 x^{17} + 19018 x^{16} - 81544 x^{15} + 888786 x^{14} + \cdots + 21376757978 \) 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:   \(5117380860656444079832785566505699574289404854272\) \(\medspace = 2^{16}\cdot 7^{15}\cdot 11^{15}\cdot 13^{14}\) 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:  \(272.55\)
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:   \(2\), \(7\), \(11\), \(13\) 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:  \(\Q(\sqrt{77}) \)
$\Aut(K/\Q)$:   $C_2$
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.
Maximal CM subfield:  \(\Q(\sqrt{-77 +2 \sqrt{1001}})\)

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $\frac{1}{13}a^{12}+\frac{2}{13}a^{11}-\frac{3}{13}a^{10}-\frac{3}{13}a^{9}-\frac{5}{13}a^{8}-\frac{5}{13}a^{7}-\frac{5}{13}a^{6}+\frac{4}{13}a^{5}+\frac{2}{13}a^{4}-\frac{4}{13}a^{3}-\frac{2}{13}a^{2}-\frac{4}{13}a-\frac{1}{13}$, $\frac{1}{13}a^{13}+\frac{6}{13}a^{11}+\frac{3}{13}a^{10}+\frac{1}{13}a^{9}+\frac{5}{13}a^{8}+\frac{5}{13}a^{7}+\frac{1}{13}a^{6}-\frac{6}{13}a^{5}+\frac{5}{13}a^{4}+\frac{6}{13}a^{3}-\frac{6}{13}a+\frac{2}{13}$, $\frac{1}{221}a^{14}+\frac{7}{221}a^{13}+\frac{4}{221}a^{12}-\frac{11}{221}a^{11}+\frac{2}{221}a^{10}+\frac{83}{221}a^{9}+\frac{89}{221}a^{8}-\frac{58}{221}a^{7}+\frac{50}{221}a^{6}-\frac{32}{221}a^{5}-\frac{15}{221}a^{4}-\frac{28}{221}a^{3}+\frac{24}{221}a^{2}-\frac{19}{221}a-\frac{10}{221}$, $\frac{1}{1105}a^{15}-\frac{2}{1105}a^{14}-\frac{42}{1105}a^{13}+\frac{4}{1105}a^{12}+\frac{526}{1105}a^{11}-\frac{37}{1105}a^{10}+\frac{18}{221}a^{9}-\frac{29}{221}a^{8}+\frac{402}{1105}a^{7}-\frac{499}{1105}a^{6}-\frac{288}{1105}a^{5}-\frac{369}{1105}a^{4}+\frac{174}{1105}a^{3}+\frac{547}{1105}a^{2}+\frac{297}{1105}a-\frac{369}{1105}$, $\frac{1}{1105}a^{16}-\frac{1}{1105}a^{14}-\frac{4}{221}a^{13}+\frac{2}{65}a^{12}-\frac{32}{221}a^{11}+\frac{276}{1105}a^{10}+\frac{6}{221}a^{9}-\frac{388}{1105}a^{8}-\frac{36}{221}a^{7}-\frac{311}{1105}a^{6}-\frac{4}{17}a^{5}+\frac{42}{85}a^{4}-\frac{56}{221}a^{3}+\frac{516}{1105}a^{2}+\frac{61}{221}a+\frac{87}{1105}$, $\frac{1}{1105}a^{17}-\frac{2}{1105}a^{14}-\frac{38}{1105}a^{13}+\frac{9}{1105}a^{12}-\frac{268}{1105}a^{11}+\frac{373}{1105}a^{10}-\frac{168}{1105}a^{9}+\frac{36}{221}a^{8}-\frac{134}{1105}a^{7}-\frac{354}{1105}a^{6}-\frac{127}{1105}a^{5}-\frac{524}{1105}a^{4}-\frac{25}{221}a^{3}+\frac{57}{1105}a^{2}-\frac{421}{1105}a+\frac{111}{1105}$, $\frac{1}{51\cdots 05}a^{18}-\frac{50\cdots 03}{51\cdots 05}a^{17}+\frac{17\cdots 29}{51\cdots 05}a^{16}+\frac{14\cdots 37}{51\cdots 05}a^{15}-\frac{36\cdots 74}{51\cdots 05}a^{14}+\frac{34\cdots 99}{10\cdots 81}a^{13}+\frac{18\cdots 77}{51\cdots 05}a^{12}+\frac{25\cdots 66}{51\cdots 05}a^{11}+\frac{14\cdots 64}{51\cdots 05}a^{10}+\frac{14\cdots 34}{51\cdots 05}a^{9}+\frac{22\cdots 44}{51\cdots 05}a^{8}-\frac{92\cdots 89}{51\cdots 05}a^{7}-\frac{98\cdots 33}{10\cdots 81}a^{6}+\frac{17\cdots 92}{10\cdots 81}a^{5}+\frac{20\cdots 08}{79\cdots 37}a^{4}-\frac{20\cdots 67}{51\cdots 05}a^{3}+\frac{20\cdots 56}{10\cdots 81}a^{2}-\frac{30\cdots 18}{51\cdots 05}a+\frac{79\cdots 79}{51\cdots 05}$, $\frac{1}{22\cdots 45}a^{19}+\frac{10\cdots 18}{34\cdots 93}a^{18}-\frac{13\cdots 59}{44\cdots 09}a^{17}+\frac{16\cdots 80}{44\cdots 09}a^{16}-\frac{36\cdots 32}{22\cdots 45}a^{15}+\frac{40\cdots 77}{44\cdots 09}a^{14}+\frac{63\cdots 92}{44\cdots 09}a^{13}+\frac{64\cdots 85}{44\cdots 09}a^{12}+\frac{30\cdots 58}{57\cdots 95}a^{11}-\frac{11\cdots 75}{26\cdots 77}a^{10}-\frac{57\cdots 44}{22\cdots 45}a^{9}+\frac{17\cdots 76}{44\cdots 09}a^{8}-\frac{98\cdots 39}{44\cdots 09}a^{7}+\frac{88\cdots 53}{44\cdots 09}a^{6}+\frac{39\cdots 54}{97\cdots 15}a^{5}-\frac{23\cdots 40}{19\cdots 83}a^{4}-\frac{74\cdots 57}{22\cdots 45}a^{3}-\frac{17\cdots 68}{44\cdots 09}a^{2}-\frac{37\cdots 88}{22\cdots 45}a+\frac{21\cdots 83}{44\cdots 09}$ 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:  $C_{2}\times C_{4}\times C_{16}$, which has order $128$ (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:  $C_{2}\times C_{4}\times C_{16}$, which has order $128$ (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:   $\frac{38\cdots 16}{34\cdots 93}a^{19}+\frac{12\cdots 46}{20\cdots 29}a^{18}-\frac{82\cdots 36}{34\cdots 93}a^{17}+\frac{36\cdots 43}{34\cdots 93}a^{16}-\frac{71\cdots 00}{34\cdots 93}a^{15}+\frac{27\cdots 36}{34\cdots 93}a^{14}-\frac{33\cdots 68}{34\cdots 93}a^{13}+\frac{10\cdots 34}{34\cdots 93}a^{12}-\frac{88\cdots 32}{34\cdots 93}a^{11}+\frac{22\cdots 64}{34\cdots 93}a^{10}-\frac{13\cdots 68}{34\cdots 93}a^{9}+\frac{20\cdots 96}{26\cdots 61}a^{8}-\frac{90\cdots 80}{26\cdots 61}a^{7}+\frac{17\cdots 38}{34\cdots 93}a^{6}-\frac{57\cdots 56}{34\cdots 93}a^{5}+\frac{71\cdots 44}{34\cdots 93}a^{4}-\frac{16\cdots 16}{34\cdots 93}a^{3}+\frac{16\cdots 28}{34\cdots 93}a^{2}-\frac{19\cdots 43}{34\cdots 93}a+\frac{48\cdots 47}{14\cdots 91}$, $\frac{96\cdots 48}{34\cdots 93}a^{19}-\frac{52\cdots 04}{34\cdots 93}a^{18}+\frac{20\cdots 90}{34\cdots 93}a^{17}-\frac{95\cdots 45}{34\cdots 93}a^{16}+\frac{18\cdots 28}{34\cdots 93}a^{15}-\frac{54\cdots 78}{26\cdots 61}a^{14}+\frac{84\cdots 48}{34\cdots 93}a^{13}-\frac{27\cdots 21}{34\cdots 93}a^{12}+\frac{22\cdots 16}{34\cdots 93}a^{11}-\frac{59\cdots 08}{34\cdots 93}a^{10}+\frac{34\cdots 33}{34\cdots 93}a^{9}-\frac{71\cdots 74}{34\cdots 93}a^{8}+\frac{30\cdots 36}{34\cdots 93}a^{7}-\frac{48\cdots 41}{34\cdots 93}a^{6}+\frac{11\cdots 22}{26\cdots 61}a^{5}-\frac{19\cdots 62}{34\cdots 93}a^{4}+\frac{38\cdots 55}{34\cdots 93}a^{3}-\frac{45\cdots 04}{34\cdots 93}a^{2}+\frac{44\cdots 55}{34\cdots 93}a-\frac{13\cdots 11}{14\cdots 91}$, $\frac{12\cdots 30}{44\cdots 09}a^{19}+\frac{88\cdots 58}{44\cdots 09}a^{18}-\frac{26\cdots 16}{44\cdots 09}a^{17}+\frac{96\cdots 54}{26\cdots 77}a^{16}-\frac{23\cdots 94}{44\cdots 09}a^{15}+\frac{12\cdots 69}{44\cdots 09}a^{14}-\frac{86\cdots 39}{34\cdots 93}a^{13}+\frac{29\cdots 49}{26\cdots 61}a^{12}-\frac{30\cdots 41}{44\cdots 09}a^{11}+\frac{11\cdots 52}{44\cdots 09}a^{10}-\frac{47\cdots 98}{44\cdots 09}a^{9}+\frac{13\cdots 60}{44\cdots 09}a^{8}-\frac{40\cdots 63}{44\cdots 09}a^{7}+\frac{50\cdots 52}{26\cdots 77}a^{6}-\frac{16\cdots 34}{44\cdots 09}a^{5}+\frac{24\cdots 97}{44\cdots 09}a^{4}-\frac{20\cdots 21}{34\cdots 93}a^{3}+\frac{21\cdots 60}{44\cdots 09}a^{2}-\frac{96\cdots 37}{44\cdots 09}a+\frac{16\cdots 57}{44\cdots 09}$, $\frac{84\cdots 92}{79\cdots 37}a^{19}-\frac{48\cdots 96}{79\cdots 37}a^{18}-\frac{12\cdots 32}{79\cdots 37}a^{17}-\frac{81\cdots 12}{61\cdots 49}a^{16}-\frac{54\cdots 72}{79\cdots 37}a^{15}-\frac{88\cdots 76}{79\cdots 37}a^{14}-\frac{32\cdots 16}{79\cdots 37}a^{13}-\frac{36\cdots 08}{79\cdots 37}a^{12}+\frac{44\cdots 28}{79\cdots 37}a^{11}-\frac{80\cdots 04}{79\cdots 37}a^{10}+\frac{13\cdots 64}{79\cdots 37}a^{9}-\frac{92\cdots 68}{79\cdots 37}a^{8}+\frac{14\cdots 16}{79\cdots 37}a^{7}-\frac{31\cdots 00}{46\cdots 61}a^{6}+\frac{78\cdots 60}{79\cdots 37}a^{5}-\frac{12\cdots 80}{61\cdots 49}a^{4}+\frac{23\cdots 04}{79\cdots 37}a^{3}-\frac{27\cdots 40}{79\cdots 37}a^{2}+\frac{24\cdots 64}{79\cdots 37}a-\frac{10\cdots 87}{79\cdots 37}$, $\frac{11\cdots 68}{22\cdots 45}a^{19}-\frac{29\cdots 83}{17\cdots 65}a^{18}+\frac{28\cdots 18}{22\cdots 45}a^{17}-\frac{65\cdots 27}{22\cdots 45}a^{16}+\frac{18\cdots 98}{22\cdots 45}a^{15}-\frac{89\cdots 34}{44\cdots 09}a^{14}+\frac{13\cdots 42}{22\cdots 45}a^{13}-\frac{15\cdots 58}{22\cdots 45}a^{12}+\frac{42\cdots 84}{22\cdots 45}a^{11}-\frac{28\cdots 69}{22\cdots 45}a^{10}+\frac{66\cdots 98}{22\cdots 45}a^{9}-\frac{17\cdots 34}{13\cdots 85}a^{8}+\frac{54\cdots 17}{22\cdots 45}a^{7}-\frac{16\cdots 28}{22\cdots 45}a^{6}+\frac{26\cdots 27}{22\cdots 45}a^{5}-\frac{10\cdots 04}{44\cdots 09}a^{4}+\frac{69\cdots 99}{22\cdots 45}a^{3}-\frac{77\cdots 89}{22\cdots 45}a^{2}+\frac{12\cdots 75}{44\cdots 09}a-\frac{24\cdots 37}{22\cdots 45}$, $\frac{10\cdots 59}{22\cdots 45}a^{19}+\frac{59\cdots 65}{44\cdots 09}a^{18}-\frac{19\cdots 06}{22\cdots 45}a^{17}+\frac{44\cdots 22}{22\cdots 45}a^{16}-\frac{15\cdots 09}{22\cdots 45}a^{15}+\frac{10\cdots 98}{97\cdots 15}a^{14}-\frac{60\cdots 88}{22\cdots 45}a^{13}+\frac{60\cdots 61}{22\cdots 45}a^{12}-\frac{12\cdots 41}{22\cdots 45}a^{11}+\frac{41\cdots 73}{22\cdots 45}a^{10}-\frac{60\cdots 82}{97\cdots 15}a^{9}-\frac{74\cdots 96}{22\cdots 45}a^{8}-\frac{12\cdots 70}{44\cdots 09}a^{7}-\frac{22\cdots 81}{44\cdots 09}a^{6}-\frac{47\cdots 99}{44\cdots 09}a^{5}-\frac{38\cdots 21}{22\cdots 45}a^{4}+\frac{14\cdots 30}{44\cdots 09}a^{3}-\frac{12\cdots 14}{22\cdots 45}a^{2}+\frac{15\cdots 29}{22\cdots 45}a-\frac{79\cdots 89}{22\cdots 45}$, $\frac{71\cdots 80}{34\cdots 93}a^{19}+\frac{23\cdots 52}{22\cdots 45}a^{18}-\frac{98\cdots 56}{22\cdots 45}a^{17}+\frac{18\cdots 26}{97\cdots 15}a^{16}-\frac{84\cdots 02}{22\cdots 45}a^{15}+\frac{30\cdots 84}{22\cdots 45}a^{14}-\frac{38\cdots 73}{22\cdots 45}a^{13}+\frac{22\cdots 25}{44\cdots 09}a^{12}-\frac{10\cdots 69}{22\cdots 45}a^{11}+\frac{47\cdots 27}{44\cdots 09}a^{10}-\frac{15\cdots 67}{22\cdots 45}a^{9}+\frac{27\cdots 83}{22\cdots 45}a^{8}-\frac{25\cdots 09}{44\cdots 09}a^{7}+\frac{17\cdots 54}{22\cdots 45}a^{6}-\frac{60\cdots 97}{22\cdots 45}a^{5}+\frac{50\cdots 28}{17\cdots 65}a^{4}-\frac{15\cdots 48}{22\cdots 45}a^{3}+\frac{14\cdots 33}{22\cdots 45}a^{2}-\frac{17\cdots 43}{22\cdots 45}a+\frac{93\cdots 87}{22\cdots 45}$, $\frac{30\cdots 64}{44\cdots 09}a^{19}-\frac{18\cdots 62}{22\cdots 45}a^{18}+\frac{20\cdots 88}{13\cdots 85}a^{17}-\frac{34\cdots 08}{22\cdots 45}a^{16}+\frac{32\cdots 22}{22\cdots 45}a^{15}-\frac{26\cdots 24}{22\cdots 45}a^{14}+\frac{90\cdots 69}{13\cdots 85}a^{13}-\frac{20\cdots 54}{44\cdots 09}a^{12}+\frac{40\cdots 79}{22\cdots 45}a^{11}-\frac{42\cdots 42}{44\cdots 09}a^{10}+\frac{60\cdots 87}{22\cdots 45}a^{9}-\frac{10\cdots 76}{97\cdots 15}a^{8}+\frac{96\cdots 75}{44\cdots 09}a^{7}-\frac{13\cdots 19}{22\cdots 45}a^{6}+\frac{16\cdots 69}{17\cdots 65}a^{5}-\frac{25\cdots 82}{13\cdots 85}a^{4}+\frac{59\cdots 18}{22\cdots 45}a^{3}-\frac{68\cdots 38}{22\cdots 45}a^{2}+\frac{33\cdots 04}{13\cdots 85}a-\frac{17\cdots 29}{17\cdots 65}$, $\frac{35\cdots 69}{22\cdots 45}a^{19}-\frac{24\cdots 94}{22\cdots 45}a^{18}-\frac{61\cdots 68}{22\cdots 45}a^{17}-\frac{98\cdots 47}{22\cdots 45}a^{16}-\frac{18\cdots 01}{10\cdots 45}a^{15}-\frac{10\cdots 16}{22\cdots 45}a^{14}-\frac{13\cdots 28}{22\cdots 45}a^{13}-\frac{55\cdots 21}{22\cdots 45}a^{12}-\frac{11\cdots 11}{13\cdots 85}a^{11}-\frac{28\cdots 33}{44\cdots 09}a^{10}-\frac{62\cdots 47}{34\cdots 93}a^{9}-\frac{19\cdots 18}{22\cdots 45}a^{8}+\frac{16\cdots 09}{22\cdots 45}a^{7}-\frac{23\cdots 84}{44\cdots 09}a^{6}+\frac{29\cdots 46}{44\cdots 09}a^{5}-\frac{38\cdots 02}{22\cdots 45}a^{4}+\frac{57\cdots 07}{22\cdots 45}a^{3}-\frac{73\cdots 73}{22\cdots 45}a^{2}+\frac{70\cdots 02}{22\cdots 45}a-\frac{13\cdots 33}{97\cdots 15}$ 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:  \( 1018200581271943.9 \) (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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 1018200581271943.9 \cdot 128}{2\cdot\sqrt{5117380860656444079832785566505699574289404854272}}\cr\approx \mathstrut & 2.76240993920227 \end{aligned}\] (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 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978) 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 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978, 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 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978); 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 - 6*x^19 + 216*x^18 - 1093*x^17 + 19018*x^16 - 81544*x^15 + 888786*x^14 - 3200544*x^13 + 23877802*x^12 - 70647150*x^11 + 372810412*x^10 - 881542622*x^9 + 3311764471*x^8 - 6211478090*x^7 + 16546960658*x^6 - 25919041653*x^5 + 47528976126*x^4 - 62448845622*x^3 + 68366421642*x^2 - 54399144116*x + 21376757978); 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

$C_{20}:C_4$ (as 20T18):

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 80
The 14 conjugacy class representatives for $C_{20}:C_4$
Character table for $C_{20}:C_4$

Intermediate fields

\(\Q(\sqrt{1001}) \), \(\Q(\sqrt{-77 +2 \sqrt{1001}})\), 5.1.35152.1, deg 10

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 20 sibling: data not computed
Degree 40 siblings: data not computed
Minimal sibling: 20.0.393644681588957236910214274346592274945338834944.1

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type R $20$ ${\href{/padicField/5.4.0.1}{4} }^{4}{,}\,{\href{/padicField/5.2.0.1}{2} }{,}\,{\href{/padicField/5.1.0.1}{1} }^{2}$ R R R ${\href{/padicField/17.2.0.1}{2} }^{10}$ ${\href{/padicField/19.4.0.1}{4} }^{4}{,}\,{\href{/padicField/19.2.0.1}{2} }^{2}$ ${\href{/padicField/23.2.0.1}{2} }^{10}$ $20$ ${\href{/padicField/31.4.0.1}{4} }^{4}{,}\,{\href{/padicField/31.2.0.1}{2} }{,}\,{\href{/padicField/31.1.0.1}{1} }^{2}$ ${\href{/padicField/37.4.0.1}{4} }^{4}{,}\,{\href{/padicField/37.2.0.1}{2} }^{2}$ ${\href{/padicField/41.4.0.1}{4} }^{4}{,}\,{\href{/padicField/41.2.0.1}{2} }^{2}$ ${\href{/padicField/43.4.0.1}{4} }^{5}$ ${\href{/padicField/47.4.0.1}{4} }^{4}{,}\,{\href{/padicField/47.2.0.1}{2} }{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ ${\href{/padicField/53.5.0.1}{5} }^{4}$ ${\href{/padicField/59.4.0.1}{4} }^{4}{,}\,{\href{/padicField/59.2.0.1}{2} }{,}\,{\href{/padicField/59.1.0.1}{1} }^{2}$

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
\(2\) Copy content Toggle raw display 2.5.4.1$x^{5} + 2$$5$$1$$4$$F_5$$$[\ ]_{5}^{4}$$
2.5.4.1$x^{5} + 2$$5$$1$$4$$F_5$$$[\ ]_{5}^{4}$$
2.10.8.1$x^{10} + 5 x^{9} + 15 x^{8} + 30 x^{7} + 45 x^{6} + 51 x^{5} + 45 x^{4} + 30 x^{3} + 15 x^{2} + 5 x + 3$$5$$2$$8$$F_5$$$[\ ]_{5}^{4}$$
\(7\) Copy content Toggle raw display 7.4.3.1$x^{4} + 7$$4$$1$$3$$D_{4}$$$[\ ]_{4}^{2}$$
7.16.12.1$x^{16} + 20 x^{14} + 16 x^{13} + 162 x^{12} + 240 x^{11} + 776 x^{10} + 1344 x^{9} + 2539 x^{8} + 3696 x^{7} + 5016 x^{6} + 5312 x^{5} + 4594 x^{4} + 2928 x^{3} + 1404 x^{2} + 432 x + 88$$4$$4$$12$$C_4:C_4$$$[\ ]_{4}^{4}$$
\(11\) Copy content Toggle raw display 11.4.3.2$x^{4} + 22$$4$$1$$3$$D_{4}$$$[\ ]_{4}^{2}$$
11.16.12.1$x^{16} + 32 x^{14} + 40 x^{13} + 392 x^{12} + 960 x^{11} + 2840 x^{10} + 7920 x^{9} + 15256 x^{8} + 28320 x^{7} + 45280 x^{6} + 47840 x^{5} + 30768 x^{4} + 11840 x^{3} + 2656 x^{2} + 320 x + 27$$4$$4$$12$$C_4:C_4$$$[\ ]_{4}^{4}$$
\(13\) Copy content Toggle raw display 13.2.1.1$x^{2} + 13$$2$$1$$1$$C_2$$$[\ ]_{2}$$
13.2.1.1$x^{2} + 13$$2$$1$$1$$C_2$$$[\ ]_{2}$$
13.4.3.2$x^{4} + 13$$4$$1$$3$$C_4$$$[\ ]_{4}$$
13.4.3.2$x^{4} + 13$$4$$1$$3$$C_4$$$[\ ]_{4}$$
13.4.3.2$x^{4} + 13$$4$$1$$3$$C_4$$$[\ ]_{4}$$
13.4.3.2$x^{4} + 13$$4$$1$$3$$C_4$$$[\ ]_{4}$$

Spectrum of ring of integers

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