Properties

Label 20.4.511...272.1
Degree $20$
Signature $(4, 8)$
Discriminant $5.117\times 10^{48}$
Root discriminant \(272.55\)
Ramified primes $2,7,11,13$
Class number $8$ (GRH)
Class group [2, 4] (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 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520)
 
Copy content gp:K = bnfinit(y^20 - 3*y^19 - 109*y^18 + 874*y^17 - 759*y^16 - 15157*y^15 - 135227*y^14 + 1527264*y^13 + 927943*y^12 - 29902077*y^11 + 15880149*y^10 + 910761676*y^9 - 3607945172*y^8 - 25051446848*y^7 + 47447295520*y^6 + 579288476848*y^5 + 469017755136*y^4 - 4937110551040*y^3 - 15529734627008*y^2 - 9459350206144*y + 6774058131520, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^20 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^20 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520)
 

\( x^{20} - 3 x^{19} - 109 x^{18} + 874 x^{17} - 759 x^{16} - 15157 x^{15} - 135227 x^{14} + \cdots + 6774058131520 \) 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:  $(4, 8)$
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.
This field has no CM subfields.

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $\frac{1}{2}a^{12}-\frac{1}{2}a^{11}-\frac{1}{2}a^{10}-\frac{1}{2}a^{8}-\frac{1}{2}a^{7}-\frac{1}{2}a^{6}-\frac{1}{2}a^{4}-\frac{1}{2}a^{3}-\frac{1}{2}a^{2}$, $\frac{1}{2}a^{13}-\frac{1}{2}a^{10}-\frac{1}{2}a^{9}-\frac{1}{2}a^{6}-\frac{1}{2}a^{5}-\frac{1}{2}a^{2}$, $\frac{1}{4}a^{14}-\frac{1}{4}a^{13}-\frac{1}{4}a^{12}-\frac{1}{2}a^{11}-\frac{1}{4}a^{10}+\frac{1}{4}a^{9}+\frac{1}{4}a^{8}+\frac{1}{4}a^{6}+\frac{1}{4}a^{5}+\frac{1}{4}a^{4}-\frac{1}{2}a^{2}$, $\frac{1}{16}a^{15}-\frac{1}{16}a^{14}+\frac{1}{16}a^{13}-\frac{1}{4}a^{12}+\frac{1}{16}a^{11}+\frac{5}{16}a^{10}+\frac{7}{16}a^{9}+\frac{3}{8}a^{8}+\frac{3}{16}a^{7}+\frac{1}{16}a^{6}-\frac{1}{16}a^{5}+\frac{1}{8}a^{4}-\frac{1}{2}a^{2}-\frac{1}{2}a-\frac{1}{2}$, $\frac{1}{32}a^{16}-\frac{1}{32}a^{15}+\frac{1}{32}a^{14}-\frac{1}{8}a^{13}+\frac{1}{32}a^{12}-\frac{11}{32}a^{11}-\frac{9}{32}a^{10}-\frac{5}{16}a^{9}-\frac{13}{32}a^{8}-\frac{15}{32}a^{7}+\frac{15}{32}a^{6}+\frac{1}{16}a^{5}-\frac{1}{4}a^{3}-\frac{1}{4}a^{2}+\frac{1}{4}a$, $\frac{1}{32}a^{17}-\frac{3}{32}a^{14}-\frac{3}{32}a^{13}+\frac{3}{16}a^{12}-\frac{1}{8}a^{11}-\frac{3}{32}a^{10}+\frac{9}{32}a^{9}-\frac{3}{8}a^{8}-\frac{1}{2}a^{7}+\frac{1}{32}a^{6}+\frac{1}{16}a^{5}+\frac{1}{4}a^{4}-\frac{1}{2}a^{2}+\frac{1}{4}a$, $\frac{1}{64}a^{18}-\frac{1}{64}a^{17}-\frac{1}{64}a^{16}-\frac{1}{32}a^{15}-\frac{1}{64}a^{14}-\frac{3}{64}a^{13}-\frac{11}{64}a^{12}+\frac{3}{16}a^{11}+\frac{5}{64}a^{10}-\frac{27}{64}a^{9}-\frac{23}{64}a^{8}-\frac{1}{2}a^{7}-\frac{15}{32}a^{6}+\frac{5}{16}a^{5}-\frac{1}{8}a^{4}+\frac{3}{8}a^{3}+\frac{1}{4}a^{2}-\frac{1}{4}a$, $\frac{1}{11\cdots 88}a^{19}-\frac{15\cdots 99}{11\cdots 88}a^{18}+\frac{10\cdots 65}{11\cdots 88}a^{17}+\frac{92\cdots 57}{14\cdots 36}a^{16}+\frac{14\cdots 79}{11\cdots 88}a^{15}+\frac{28\cdots 15}{31\cdots 24}a^{14}-\frac{21\cdots 57}{11\cdots 88}a^{13}+\frac{93\cdots 69}{15\cdots 12}a^{12}+\frac{46\cdots 45}{11\cdots 88}a^{11}-\frac{39\cdots 13}{11\cdots 88}a^{10}-\frac{52\cdots 73}{11\cdots 88}a^{9}-\frac{42\cdots 93}{58\cdots 44}a^{8}+\frac{19\cdots 33}{58\cdots 44}a^{7}+\frac{24\cdots 33}{14\cdots 36}a^{6}-\frac{49\cdots 39}{14\cdots 36}a^{5}+\frac{63\cdots 29}{14\cdots 36}a^{4}+\frac{54\cdots 93}{36\cdots 34}a^{3}+\frac{23\cdots 17}{73\cdots 68}a^{2}+\frac{66\cdots 15}{36\cdots 34}a+\frac{83\cdots 25}{18\cdots 17}$ 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:  $C_{2}\times C_{4}$, which has order $8$ (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:  $C_{2}\times C_{2}\times C_{2}\times C_{4}$, which has order $32$ (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:  $11$
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:   $\frac{43\cdots 39}{28\cdots 12}a^{19}+\frac{12\cdots 93}{14\cdots 56}a^{18}+\frac{21\cdots 87}{14\cdots 56}a^{17}-\frac{50\cdots 69}{28\cdots 12}a^{16}+\frac{15\cdots 37}{28\cdots 12}a^{15}+\frac{55\cdots 85}{35\cdots 14}a^{14}+\frac{16\cdots 11}{14\cdots 56}a^{13}-\frac{70\cdots 05}{28\cdots 12}a^{12}+\frac{11\cdots 85}{28\cdots 12}a^{11}+\frac{63\cdots 21}{14\cdots 56}a^{10}-\frac{29\cdots 35}{14\cdots 56}a^{9}-\frac{20\cdots 01}{28\cdots 12}a^{8}+\frac{11\cdots 65}{14\cdots 56}a^{7}+\frac{63\cdots 35}{35\cdots 14}a^{6}-\frac{49\cdots 69}{35\cdots 14}a^{5}-\frac{27\cdots 91}{70\cdots 28}a^{4}+\frac{88\cdots 39}{17\cdots 57}a^{3}+\frac{16\cdots 93}{35\cdots 14}a^{2}+\frac{73\cdots 56}{17\cdots 57}a+\frac{78\cdots 83}{17\cdots 57}$, $\frac{26\cdots 02}{17\cdots 57}a^{19}-\frac{65\cdots 97}{14\cdots 56}a^{18}-\frac{12\cdots 19}{70\cdots 28}a^{17}+\frac{10\cdots 69}{70\cdots 28}a^{16}+\frac{33\cdots 89}{14\cdots 56}a^{15}-\frac{65\cdots 85}{14\cdots 56}a^{14}-\frac{18\cdots 74}{17\cdots 57}a^{13}+\frac{16\cdots 87}{70\cdots 28}a^{12}+\frac{34\cdots 05}{14\cdots 56}a^{11}-\frac{10\cdots 45}{14\cdots 56}a^{10}+\frac{10\cdots 71}{70\cdots 28}a^{9}+\frac{11\cdots 61}{70\cdots 28}a^{8}-\frac{11\cdots 91}{14\cdots 56}a^{7}-\frac{31\cdots 87}{70\cdots 28}a^{6}+\frac{67\cdots 01}{35\cdots 14}a^{5}+\frac{28\cdots 85}{35\cdots 14}a^{4}-\frac{19\cdots 29}{17\cdots 57}a^{3}-\frac{27\cdots 35}{35\cdots 14}a^{2}-\frac{10\cdots 68}{17\cdots 57}a+\frac{82\cdots 61}{17\cdots 57}$, $\frac{26\cdots 27}{92\cdots 14}a^{19}-\frac{24\cdots 31}{36\cdots 56}a^{18}+\frac{10\cdots 47}{36\cdots 56}a^{17}-\frac{35\cdots 85}{36\cdots 56}a^{16}-\frac{64\cdots 23}{18\cdots 28}a^{15}+\frac{25\cdots 79}{99\cdots 88}a^{14}+\frac{20\cdots 21}{36\cdots 56}a^{13}-\frac{15\cdots 03}{99\cdots 88}a^{12}-\frac{55\cdots 33}{46\cdots 07}a^{11}+\frac{89\cdots 77}{36\cdots 56}a^{10}+\frac{32\cdots 77}{36\cdots 56}a^{9}-\frac{81\cdots 07}{36\cdots 56}a^{8}-\frac{62\cdots 36}{46\cdots 07}a^{7}+\frac{12\cdots 77}{18\cdots 28}a^{6}+\frac{20\cdots 91}{92\cdots 14}a^{5}-\frac{23\cdots 89}{46\cdots 07}a^{4}-\frac{19\cdots 81}{46\cdots 07}a^{3}-\frac{41\cdots 02}{46\cdots 07}a^{2}-\frac{19\cdots 18}{46\cdots 07}a+\frac{16\cdots 89}{46\cdots 07}$, $\frac{38\cdots 99}{36\cdots 56}a^{19}+\frac{30\cdots 11}{14\cdots 24}a^{18}+\frac{18\cdots 45}{14\cdots 24}a^{17}-\frac{12\cdots 99}{14\cdots 24}a^{16}-\frac{83\cdots 77}{73\cdots 12}a^{15}+\frac{12\cdots 77}{39\cdots 52}a^{14}+\frac{12\cdots 67}{14\cdots 24}a^{13}-\frac{56\cdots 65}{39\cdots 52}a^{12}-\frac{17\cdots 05}{46\cdots 07}a^{11}+\frac{77\cdots 43}{14\cdots 24}a^{10}-\frac{86\cdots 85}{14\cdots 24}a^{9}-\frac{16\cdots 01}{14\cdots 24}a^{8}+\frac{20\cdots 28}{46\cdots 07}a^{7}+\frac{24\cdots 55}{73\cdots 12}a^{6}-\frac{32\cdots 35}{36\cdots 56}a^{5}-\frac{12\cdots 79}{18\cdots 28}a^{4}+\frac{19\cdots 29}{18\cdots 28}a^{3}+\frac{61\cdots 29}{92\cdots 14}a^{2}+\frac{12\cdots 09}{92\cdots 14}a-\frac{30\cdots 39}{46\cdots 07}$, $\frac{83\cdots 75}{11\cdots 88}a^{19}+\frac{58\cdots 89}{11\cdots 88}a^{18}+\frac{86\cdots 01}{11\cdots 88}a^{17}-\frac{14\cdots 09}{14\cdots 36}a^{16}+\frac{34\cdots 03}{11\cdots 88}a^{15}+\frac{48\cdots 99}{31\cdots 24}a^{14}-\frac{23\cdots 73}{11\cdots 88}a^{13}-\frac{17\cdots 39}{15\cdots 12}a^{12}+\frac{19\cdots 77}{11\cdots 88}a^{11}+\frac{44\cdots 91}{11\cdots 88}a^{10}-\frac{22\cdots 01}{11\cdots 88}a^{9}-\frac{11\cdots 01}{58\cdots 44}a^{8}+\frac{29\cdots 71}{58\cdots 44}a^{7}+\frac{99\cdots 81}{18\cdots 17}a^{6}-\frac{30\cdots 45}{29\cdots 72}a^{5}-\frac{37\cdots 21}{18\cdots 17}a^{4}+\frac{15\cdots 36}{18\cdots 17}a^{3}+\frac{27\cdots 41}{73\cdots 68}a^{2}+\frac{76\cdots 05}{36\cdots 34}a-\frac{10\cdots 71}{36\cdots 34}$, $\frac{67\cdots 01}{11\cdots 88}a^{19}-\frac{43\cdots 79}{11\cdots 88}a^{18}-\frac{59\cdots 47}{11\cdots 88}a^{17}+\frac{10\cdots 29}{14\cdots 36}a^{16}-\frac{32\cdots 37}{11\cdots 88}a^{15}-\frac{26\cdots 01}{31\cdots 24}a^{14}-\frac{74\cdots 69}{11\cdots 88}a^{13}+\frac{16\cdots 81}{15\cdots 12}a^{12}-\frac{34\cdots 43}{11\cdots 88}a^{11}-\frac{11\cdots 85}{11\cdots 88}a^{10}+\frac{69\cdots 99}{11\cdots 88}a^{9}+\frac{17\cdots 75}{58\cdots 44}a^{8}-\frac{18\cdots 41}{58\cdots 44}a^{7}-\frac{25\cdots 59}{73\cdots 68}a^{6}+\frac{13\cdots 55}{29\cdots 72}a^{5}+\frac{10\cdots 31}{73\cdots 68}a^{4}-\frac{58\cdots 06}{18\cdots 17}a^{3}-\frac{13\cdots 91}{73\cdots 68}a^{2}-\frac{55\cdots 11}{36\cdots 34}a+\frac{14\cdots 21}{36\cdots 34}$, $\frac{10\cdots 73}{46\cdots 07}a^{19}+\frac{74\cdots 29}{18\cdots 28}a^{18}+\frac{59\cdots 39}{18\cdots 28}a^{17}-\frac{41\cdots 89}{18\cdots 28}a^{16}-\frac{43\cdots 95}{92\cdots 14}a^{15}+\frac{61\cdots 11}{49\cdots 44}a^{14}-\frac{35\cdots 15}{18\cdots 28}a^{13}-\frac{88\cdots 07}{49\cdots 44}a^{12}-\frac{71\cdots 04}{46\cdots 07}a^{11}+\frac{35\cdots 85}{18\cdots 28}a^{10}-\frac{10\cdots 55}{18\cdots 28}a^{9}-\frac{36\cdots 35}{18\cdots 28}a^{8}+\frac{67\cdots 20}{46\cdots 07}a^{7}+\frac{54\cdots 37}{92\cdots 14}a^{6}-\frac{14\cdots 61}{46\cdots 07}a^{5}-\frac{52\cdots 98}{46\cdots 07}a^{4}+\frac{59\cdots 74}{46\cdots 07}a^{3}+\frac{62\cdots 92}{46\cdots 07}a^{2}+\frac{56\cdots 24}{46\cdots 07}a-\frac{33\cdots 31}{46\cdots 07}$, $\frac{87\cdots 99}{58\cdots 44}a^{19}+\frac{56\cdots 99}{11\cdots 88}a^{18}-\frac{16\cdots 89}{11\cdots 88}a^{17}+\frac{47\cdots 83}{11\cdots 88}a^{16}+\frac{25\cdots 85}{14\cdots 36}a^{15}-\frac{37\cdots 69}{31\cdots 24}a^{14}-\frac{33\cdots 15}{11\cdots 88}a^{13}+\frac{17\cdots 41}{31\cdots 24}a^{12}+\frac{34\cdots 53}{58\cdots 44}a^{11}-\frac{67\cdots 59}{11\cdots 88}a^{10}-\frac{29\cdots 15}{11\cdots 88}a^{9}+\frac{13\cdots 93}{11\cdots 88}a^{8}+\frac{55\cdots 89}{29\cdots 72}a^{7}-\frac{89\cdots 89}{29\cdots 72}a^{6}-\frac{41\cdots 31}{29\cdots 72}a^{5}+\frac{62\cdots 23}{73\cdots 68}a^{4}+\frac{20\cdots 75}{14\cdots 36}a^{3}+\frac{25\cdots 11}{73\cdots 68}a^{2}+\frac{33\cdots 66}{18\cdots 17}a-\frac{51\cdots 31}{36\cdots 34}$, $\frac{84\cdots 07}{69\cdots 64}a^{19}-\frac{26\cdots 85}{69\cdots 64}a^{18}-\frac{87\cdots 23}{69\cdots 64}a^{17}+\frac{36\cdots 11}{34\cdots 32}a^{16}-\frac{12\cdots 73}{69\cdots 64}a^{15}-\frac{19\cdots 47}{18\cdots 72}a^{14}-\frac{11\cdots 05}{69\cdots 64}a^{13}+\frac{37\cdots 71}{23\cdots 84}a^{12}+\frac{14\cdots 69}{69\cdots 64}a^{11}-\frac{20\cdots 07}{69\cdots 64}a^{10}-\frac{13\cdots 05}{69\cdots 64}a^{9}+\frac{18\cdots 77}{17\cdots 16}a^{8}-\frac{14\cdots 53}{43\cdots 04}a^{7}-\frac{53\cdots 99}{17\cdots 16}a^{6}+\frac{15\cdots 65}{43\cdots 04}a^{5}+\frac{60\cdots 27}{86\cdots 08}a^{4}+\frac{39\cdots 15}{43\cdots 04}a^{3}-\frac{11\cdots 09}{21\cdots 02}a^{2}-\frac{45\cdots 05}{21\cdots 02}a-\frac{22\cdots 47}{10\cdots 01}$, $\frac{65\cdots 21}{11\cdots 88}a^{19}-\frac{87\cdots 95}{29\cdots 72}a^{18}-\frac{36\cdots 29}{73\cdots 68}a^{17}+\frac{79\cdots 89}{11\cdots 88}a^{16}-\frac{24\cdots 35}{11\cdots 88}a^{15}-\frac{14\cdots 91}{15\cdots 12}a^{14}-\frac{18\cdots 83}{29\cdots 72}a^{13}+\frac{35\cdots 81}{31\cdots 24}a^{12}-\frac{18\cdots 47}{11\cdots 88}a^{11}-\frac{28\cdots 62}{18\cdots 17}a^{10}+\frac{42\cdots 43}{73\cdots 68}a^{9}+\frac{57\cdots 89}{11\cdots 88}a^{8}-\frac{21\cdots 81}{58\cdots 44}a^{7}-\frac{16\cdots 37}{14\cdots 36}a^{6}+\frac{99\cdots 84}{18\cdots 17}a^{5}+\frac{22\cdots 97}{73\cdots 68}a^{4}-\frac{31\cdots 27}{14\cdots 36}a^{3}-\frac{55\cdots 69}{18\cdots 17}a^{2}-\frac{98\cdots 27}{18\cdots 17}a+\frac{49\cdots 03}{18\cdots 17}$, $\frac{26\cdots 17}{11\cdots 88}a^{19}-\frac{23\cdots 07}{29\cdots 72}a^{18}+\frac{27\cdots 81}{14\cdots 36}a^{17}+\frac{11\cdots 47}{11\cdots 88}a^{16}-\frac{33\cdots 37}{11\cdots 88}a^{15}-\frac{58\cdots 05}{15\cdots 12}a^{14}+\frac{25\cdots 21}{29\cdots 72}a^{13}+\frac{73\cdots 95}{31\cdots 24}a^{12}-\frac{57\cdots 69}{11\cdots 88}a^{11}-\frac{73\cdots 77}{73\cdots 68}a^{10}-\frac{52\cdots 89}{14\cdots 36}a^{9}+\frac{33\cdots 47}{11\cdots 88}a^{8}+\frac{39\cdots 21}{58\cdots 44}a^{7}-\frac{63\cdots 28}{18\cdots 17}a^{6}-\frac{66\cdots 81}{36\cdots 34}a^{5}-\frac{42\cdots 00}{18\cdots 17}a^{4}+\frac{22\cdots 43}{14\cdots 36}a^{3}+\frac{13\cdots 19}{36\cdots 34}a^{2}+\frac{33\cdots 61}{18\cdots 17}a-\frac{26\cdots 21}{18\cdots 17}$ 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:  \( 33260752823462220 \) (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)
 
Unit signature rank:  \( 2 \) (assuming GRH)

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{4}\cdot(2\pi)^{8}\cdot 33260752823462220 \cdot 8}{2\cdot\sqrt{5117380860656444079832785566505699574289404854272}}\cr\approx \mathstrut & 2.28574156303384 \end{aligned}\] (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 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520) 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 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520, 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 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520); 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 - 3*x^19 - 109*x^18 + 874*x^17 - 759*x^16 - 15157*x^15 - 135227*x^14 + 1527264*x^13 + 927943*x^12 - 29902077*x^11 + 15880149*x^10 + 910761676*x^9 - 3607945172*x^8 - 25051446848*x^7 + 47447295520*x^6 + 579288476848*x^5 + 469017755136*x^4 - 4937110551040*x^3 - 15529734627008*x^2 - 9459350206144*x + 6774058131520); 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

\(\Q(\sqrt{1001}) \), \(\Q(\sqrt{154 +2 \sqrt{1001}})\), 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: 20.4.393644681588957236910214274346592274945338834944.1

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 ${\href{/padicField/17.2.0.1}{2} }^{8}{,}\,{\href{/padicField/17.1.0.1}{1} }^{4}$ ${\href{/padicField/19.4.0.1}{4} }^{4}{,}\,{\href{/padicField/19.2.0.1}{2} }^{2}$ ${\href{/padicField/23.2.0.1}{2} }^{10}$ $20$ ${\href{/padicField/31.4.0.1}{4} }^{4}{,}\,{\href{/padicField/31.2.0.1}{2} }{,}\,{\href{/padicField/31.1.0.1}{1} }^{2}$ ${\href{/padicField/37.4.0.1}{4} }^{4}{,}\,{\href{/padicField/37.2.0.1}{2} }^{2}$ ${\href{/padicField/41.4.0.1}{4} }^{4}{,}\,{\href{/padicField/41.2.0.1}{2} }^{2}$ ${\href{/padicField/43.4.0.1}{4} }^{5}$ ${\href{/padicField/47.4.0.1}{4} }^{4}{,}\,{\href{/padicField/47.2.0.1}{2} }{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ ${\href{/padicField/53.5.0.1}{5} }^{4}$ ${\href{/padicField/59.4.0.1}{4} }^{4}{,}\,{\href{/padicField/59.2.0.1}{2} }{,}\,{\href{/padicField/59.1.0.1}{1} }^{2}$

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 13.4.2.1$x^{4} + 24 x^{3} + 148 x^{2} + 48 x + 17$$2$$2$$2$$C_2^2$$$[\ ]_{2}^{2}$$
13.8.6.1$x^{8} + 48 x^{7} + 872 x^{6} + 7200 x^{5} + 24216 x^{4} + 14400 x^{3} + 3488 x^{2} + 384 x + 29$$4$$2$$6$$C_4\times C_2$$$[\ ]_{4}^{2}$$
13.8.6.1$x^{8} + 48 x^{7} + 872 x^{6} + 7200 x^{5} + 24216 x^{4} + 14400 x^{3} + 3488 x^{2} + 384 x + 29$$4$$2$$6$$C_4\times C_2$$$[\ ]_{4}^{2}$$

Spectrum of ring of integers

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