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Properties

Label 12.4.5416809268248576.2
Degree $12$
Signature $[4, 4]$
Discriminant $5.417\times 10^{15}$
Root discriminant \(20.47\)
Ramified primes $2,3,11$
Class number $1$
Class group trivial
Galois group $S_3 \times C_2^2$ (as 12T10)

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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^12 - 38*x^6 + 64)
 
Copy content gp:K = bnfinit(y^12 - 38*y^6 + 64, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^12 - 38*x^6 + 64);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^12 - 38*x^6 + 64)
 

\( x^{12} - 38x^{6} + 64 \) 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:  $12$
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:  $[4, 4]$
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:   \(5416809268248576\) \(\medspace = 2^{22}\cdot 3^{6}\cdot 11^{6}\) 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:  \(20.47\)
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:(1.0 * dK)^(1/degree(K))
 
Galois root discriminant:  $2^{11/6}3^{1/2}11^{1/2}\approx 20.471293992310418$
Ramified primes:   \(2\), \(3\), \(11\) 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:  \(\Q\)
$\Aut(K/\Q)$:   $C_2^2$
Copy content comment:Autmorphisms
 
Copy content sage:K.automorphisms()
 
Copy content magma:Automorphisms(K);
 
Copy content oscar:automorphisms(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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $\frac{1}{3}a^{4}+\frac{1}{3}a^{2}+\frac{1}{3}$, $\frac{1}{3}a^{5}+\frac{1}{3}a^{3}+\frac{1}{3}a$, $\frac{1}{6}a^{6}+\frac{1}{3}$, $\frac{1}{6}a^{7}+\frac{1}{3}a$, $\frac{1}{36}a^{8}+\frac{1}{18}a^{6}-\frac{5}{18}a^{2}+\frac{4}{9}$, $\frac{1}{72}a^{9}-\frac{1}{18}a^{7}+\frac{13}{36}a^{3}-\frac{4}{9}a$, $\frac{1}{144}a^{10}+\frac{1}{18}a^{6}-\frac{11}{72}a^{4}-\frac{1}{3}a^{2}+\frac{1}{9}$, $\frac{1}{288}a^{11}-\frac{1}{18}a^{7}+\frac{13}{144}a^{5}-\frac{4}{9}a$ 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:  Trivial group, which has order $1$
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:  $C_{2}\times C_{2}$, which has order $4$
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:  $7$
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:   $\frac{1}{144}a^{10}-\frac{1}{36}a^{8}-\frac{11}{72}a^{4}+\frac{17}{18}a^{2}-\frac{1}{3}$, $\frac{5}{288}a^{11}+\frac{1}{48}a^{10}+\frac{1}{72}a^{9}-\frac{79}{144}a^{5}-\frac{19}{24}a^{4}-\frac{23}{36}a^{3}-\frac{1}{3}a^{2}-\frac{1}{3}$, $\frac{5}{288}a^{11}-\frac{1}{48}a^{10}+\frac{1}{72}a^{9}-\frac{79}{144}a^{5}+\frac{19}{24}a^{4}-\frac{23}{36}a^{3}+\frac{1}{3}a^{2}+\frac{1}{3}$, $\frac{1}{48}a^{10}+\frac{1}{72}a^{9}-\frac{1}{18}a^{7}-\frac{19}{24}a^{4}-\frac{23}{36}a^{3}-\frac{1}{3}a^{2}+\frac{14}{9}a-\frac{1}{3}$, $\frac{1}{96}a^{11}+\frac{1}{144}a^{10}+\frac{1}{72}a^{9}-\frac{1}{36}a^{8}-\frac{1}{18}a^{7}-\frac{19}{48}a^{5}-\frac{35}{72}a^{4}-\frac{11}{36}a^{3}+\frac{11}{18}a^{2}+\frac{8}{9}a+\frac{1}{3}$, $\frac{1}{96}a^{11}-\frac{1}{144}a^{10}-\frac{1}{72}a^{9}-\frac{1}{36}a^{8}+\frac{1}{18}a^{7}-\frac{1}{9}a^{6}-\frac{19}{48}a^{5}+\frac{35}{72}a^{4}-\frac{1}{36}a^{3}+\frac{17}{18}a^{2}-\frac{2}{9}a+\frac{7}{9}$, $\frac{1}{72}a^{11}-\frac{1}{48}a^{10}+\frac{1}{72}a^{9}+\frac{1}{18}a^{7}-\frac{23}{36}a^{5}+\frac{11}{24}a^{4}-\frac{23}{36}a^{3}+a^{2}-\frac{5}{9}a+1$ Copy content Toggle raw display
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:  \( 4360.86280645 \)
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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{4}\cdot(2\pi)^{4}\cdot 4360.86280645 \cdot 1}{2\cdot\sqrt{5416809268248576}}\cr\approx \mathstrut & 0.738771464821 \end{aligned}\]

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^12 - 38*x^6 + 64) 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^12 - 38*x^6 + 64, 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^12 - 38*x^6 + 64); 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 = PolynomialRing(QQ); K, a = NumberField(x^12 - 38*x^6 + 64); 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

$C_2\times D_6$ (as 12T10):

Copy content comment:Galois group
 
Copy content sage:K.galois_group(type='pari')
 
Copy content gp:polgalois(K.pol)
 
Copy content magma:G = GaloisGroup(K);
 
Copy content oscar:G, Gtx = galois_group(K); G, transitive_group_identification(G)
 
A solvable group of order 24
The 12 conjugacy class representatives for $S_3 \times C_2^2$
Character table for $S_3 \times C_2^2$

Intermediate fields

\(\Q(\sqrt{6}) \), \(\Q(\sqrt{22}) \), \(\Q(\sqrt{33}) \), 3.1.44.1, \(\Q(\sqrt{6}, \sqrt{22})\), 6.2.6690816.1, 6.2.2725888.3, 6.2.574992.1

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(b)]
 
Copy content magma:L := Subfields(K); L[2..#L];
 
Copy content oscar:subfields(K)[2:end-1]
 

Sibling fields

Galois closure: deg 24
Degree 12 siblings: 12.0.5416809268248576.1, 12.0.44767018745856.2, 12.0.5416809268248576.4
Minimal sibling: 12.0.44767018745856.2

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type R R ${\href{/padicField/5.6.0.1}{6} }^{2}$ ${\href{/padicField/7.2.0.1}{2} }^{6}$ R ${\href{/padicField/13.2.0.1}{2} }^{6}$ ${\href{/padicField/17.2.0.1}{2} }^{6}$ ${\href{/padicField/19.2.0.1}{2} }^{6}$ ${\href{/padicField/23.6.0.1}{6} }^{2}$ ${\href{/padicField/29.2.0.1}{2} }^{4}{,}\,{\href{/padicField/29.1.0.1}{1} }^{4}$ ${\href{/padicField/31.6.0.1}{6} }^{2}$ ${\href{/padicField/37.6.0.1}{6} }^{2}$ ${\href{/padicField/41.2.0.1}{2} }^{6}$ ${\href{/padicField/43.2.0.1}{2} }^{6}$ ${\href{/padicField/47.2.0.1}{2} }^{6}$ ${\href{/padicField/53.2.0.1}{2} }^{6}$ ${\href{/padicField/59.6.0.1}{6} }^{2}$

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 2.1.6.11a1.2$x^{6} + 10$$6$$1$$11$$D_{6}$$$[3]_{3}^{2}$$
2.1.6.11a1.2$x^{6} + 10$$6$$1$$11$$D_{6}$$$[3]_{3}^{2}$$
\(3\) Copy content Toggle raw display 3.3.2.3a1.2$x^{6} + 4 x^{4} + 2 x^{3} + 4 x^{2} + 4 x + 4$$2$$3$$3$$C_6$$$[\ ]_{2}^{3}$$
3.3.2.3a1.2$x^{6} + 4 x^{4} + 2 x^{3} + 4 x^{2} + 4 x + 4$$2$$3$$3$$C_6$$$[\ ]_{2}^{3}$$
\(11\) Copy content Toggle raw display 11.2.2.2a1.2$x^{4} + 14 x^{3} + 53 x^{2} + 28 x + 15$$2$$2$$2$$C_2^2$$$[\ ]_{2}^{2}$$
11.2.2.2a1.2$x^{4} + 14 x^{3} + 53 x^{2} + 28 x + 15$$2$$2$$2$$C_2^2$$$[\ ]_{2}^{2}$$
11.2.2.2a1.2$x^{4} + 14 x^{3} + 53 x^{2} + 28 x + 15$$2$$2$$2$$C_2^2$$$[\ ]_{2}^{2}$$

Spectrum of ring of integers

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