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Properties

Label 12.4.171...000.3
Degree $12$
Signature $[4, 4]$
Discriminant $1.718\times 10^{18}$
Root discriminant \(33.08\)
Ramified primes $2,5$
Class number $1$ (GRH)
Class group trivial (GRH)
Galois group $C_4^2:S_3$ (as 12T62)

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Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^12 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16)
 
Copy content gp:K = bnfinit(y^12 + 4*y^10 + 50*y^8 - 280*y^4 - 416*y^2 + 16, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^12 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^12 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16)
 

\( x^{12} + 4x^{10} + 50x^{8} - 280x^{4} - 416x^{2} + 16 \) 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:   \(1717986918400000000\) \(\medspace = 2^{42}\cdot 5^{8}\) 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:  \(33.08\)
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:  $2^{67/16}5^{2/3}\approx 53.277410689660464$
Ramified primes:   \(2\), \(5\) 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:  \(\Q\)
$\Aut(K/\Q)$:   $C_4$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $\frac{1}{2}a^{4}$, $\frac{1}{2}a^{5}$, $\frac{1}{10}a^{6}+\frac{1}{5}a^{4}-\frac{1}{5}a^{2}+\frac{2}{5}$, $\frac{1}{20}a^{7}+\frac{1}{10}a^{5}-\frac{1}{10}a^{3}+\frac{1}{5}a$, $\frac{1}{100}a^{8}-\frac{1}{25}a^{6}+\frac{4}{25}a^{4}+\frac{9}{25}a^{2}-\frac{6}{25}$, $\frac{1}{100}a^{9}+\frac{1}{100}a^{7}-\frac{6}{25}a^{5}+\frac{13}{50}a^{3}-\frac{1}{25}a$, $\frac{1}{5000}a^{10}-\frac{1}{500}a^{8}+\frac{19}{500}a^{6}-\frac{4}{125}a^{4}+\frac{49}{125}a^{2}+\frac{268}{625}$, $\frac{1}{5000}a^{11}-\frac{1}{500}a^{9}-\frac{3}{250}a^{7}-\frac{33}{250}a^{5}+\frac{123}{250}a^{3}+\frac{143}{625}a$ 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 $1$ (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:  Trivial group, which has order $1$ (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:  $7$
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:   $\frac{3}{625}a^{10}+\frac{11}{500}a^{8}+\frac{29}{125}a^{6}+\frac{13}{250}a^{4}-\frac{159}{125}a^{2}-\frac{1243}{625}$, $\frac{8}{625}a^{10}+\frac{31}{500}a^{8}+\frac{84}{125}a^{6}+\frac{123}{250}a^{4}-\frac{509}{125}a^{2}-\frac{5073}{625}$, $\frac{1}{1000}a^{11}-\frac{8}{625}a^{10}-\frac{4}{125}a^{8}+\frac{1}{20}a^{7}-\frac{74}{125}a^{6}-\frac{1}{5}a^{5}+\frac{111}{125}a^{4}+\frac{13}{25}a^{3}+\frac{344}{125}a^{2}-\frac{187}{125}a+\frac{123}{625}$, $\frac{133}{1000}a^{11}-\frac{3}{625}a^{10}+\frac{27}{50}a^{9}-\frac{11}{500}a^{8}+\frac{669}{100}a^{7}-\frac{29}{125}a^{6}+\frac{11}{25}a^{5}-\frac{13}{250}a^{4}-\frac{184}{5}a^{3}+\frac{284}{125}a^{2}-\frac{7141}{125}a+\frac{2493}{625}$, $\frac{71}{5000}a^{11}-\frac{8}{625}a^{10}+\frac{29}{500}a^{9}-\frac{4}{125}a^{8}+\frac{349}{500}a^{7}-\frac{74}{125}a^{6}+\frac{7}{250}a^{5}+\frac{111}{125}a^{4}-\frac{571}{125}a^{3}+\frac{344}{125}a^{2}-\frac{2597}{625}a+\frac{123}{625}$, $\frac{289}{2500}a^{11}+\frac{1}{50}a^{10}+\frac{58}{125}a^{9}+\frac{2}{25}a^{8}+\frac{723}{125}a^{7}+\frac{49}{50}a^{6}+\frac{3}{125}a^{5}-\frac{3}{25}a^{4}-\frac{4088}{125}a^{3}-\frac{158}{25}a^{2}-\frac{31146}{625}a-\frac{241}{25}$, $\frac{169}{2500}a^{11}-\frac{1}{1250}a^{10}+\frac{33}{125}a^{9}+\frac{1}{125}a^{8}+\frac{423}{125}a^{7}-\frac{13}{250}a^{6}-\frac{22}{125}a^{5}+\frac{41}{125}a^{4}-\frac{2158}{125}a^{3}-\frac{346}{125}a^{2}-\frac{15266}{625}a-\frac{2697}{625}$ 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:  \( 189850.656499 \) (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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{4}\cdot(2\pi)^{4}\cdot 189850.656499 \cdot 1}{2\cdot\sqrt{1717986918400000000}}\cr\approx \mathstrut & 1.80597459783 \end{aligned}\] (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^12 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16) 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 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16, 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 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16); 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^12 + 4*x^10 + 50*x^8 - 280*x^4 - 416*x^2 + 16); 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

$C_4^2:S_3$ (as 12T62):

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); degree(K) > 1 ? (G, transitive_group_identification(G)) : (G, nothing)
 
A solvable group of order 96
The 10 conjugacy class representatives for $C_4^2:S_3$
Character table for $C_4^2:S_3$

Intermediate fields

3.1.200.1, 6.2.10240000.1

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 12 siblings: data not computed
Degree 16 sibling: data not computed
Degree 24 siblings: data not computed
Degree 32 sibling: 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 ${\href{/padicField/3.3.0.1}{3} }^{4}$ R ${\href{/padicField/7.8.0.1}{8} }{,}\,{\href{/padicField/7.4.0.1}{4} }$ ${\href{/padicField/11.3.0.1}{3} }^{4}$ ${\href{/padicField/13.4.0.1}{4} }^{2}{,}\,{\href{/padicField/13.2.0.1}{2} }^{2}$ ${\href{/padicField/17.3.0.1}{3} }^{4}$ ${\href{/padicField/19.3.0.1}{3} }^{4}$ ${\href{/padicField/23.8.0.1}{8} }{,}\,{\href{/padicField/23.4.0.1}{4} }$ ${\href{/padicField/29.4.0.1}{4} }^{2}{,}\,{\href{/padicField/29.2.0.1}{2} }^{2}$ ${\href{/padicField/31.8.0.1}{8} }{,}\,{\href{/padicField/31.4.0.1}{4} }$ ${\href{/padicField/37.8.0.1}{8} }{,}\,{\href{/padicField/37.4.0.1}{4} }$ ${\href{/padicField/41.3.0.1}{3} }^{4}$ ${\href{/padicField/43.4.0.1}{4} }^{2}{,}\,{\href{/padicField/43.1.0.1}{1} }^{4}$ ${\href{/padicField/47.2.0.1}{2} }^{4}{,}\,{\href{/padicField/47.1.0.1}{1} }^{4}$ ${\href{/padicField/53.8.0.1}{8} }{,}\,{\href{/padicField/53.4.0.1}{4} }$ ${\href{/padicField/59.2.0.1}{2} }^{4}{,}\,{\href{/padicField/59.1.0.1}{1} }^{4}$

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
\(2\) Copy content Toggle raw display 2.1.4.11a1.9$x^{4} + 4 x^{2} + 2$$4$$1$$11$$C_4$$$[3, 4]$$
2.1.8.31a1.34$x^{8} + 8 x^{6} + 16 x^{5} + 18$$8$$1$$31$$C_4\wr C_2$$$[2, 3, \frac{7}{2}, 4, 5]$$
\(5\) Copy content Toggle raw display 5.1.3.2a1.1$x^{3} + 5$$3$$1$$2$$S_3$$$[\ ]_{3}^{2}$$
5.1.3.2a1.1$x^{3} + 5$$3$$1$$2$$S_3$$$[\ ]_{3}^{2}$$
5.1.3.2a1.1$x^{3} + 5$$3$$1$$2$$S_3$$$[\ ]_{3}^{2}$$
5.1.3.2a1.1$x^{3} + 5$$3$$1$$2$$S_3$$$[\ ]_{3}^{2}$$

Spectrum of ring of integers

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