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Properties

Label 12.2.173317422340636672.3
Degree $12$
Signature $[2, 5]$
Discriminant $-1.733\times 10^{17}$
Root discriminant \(27.33\)
Ramified primes $2,7$
Class number $3$
Class group [3]
Galois group $C_6^2:C_4$ (as 12T82)

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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 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28)
 
Copy content gp:K = bnfinit(y^12 - 10*y^10 + 45*y^8 + 48*y^6 + 56*y^4 - 56*y^2 - 28, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^12 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^12 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28)
 

\( x^{12} - 10x^{10} + 45x^{8} + 48x^{6} + 56x^{4} - 56x^{2} - 28 \) 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:  $[2, 5]$
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:   \(-173317422340636672\) \(\medspace = -\,2^{32}\cdot 7^{9}\) 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:  \(27.33\)
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:  $2^{3}7^{5/6}\approx 40.48912147837109$
Ramified primes:   \(2\), \(7\) 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:  \(\Q(\sqrt{-7}) \)
$\Aut(K/\Q)$:   $C_2$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $\frac{1}{2}a^{6}-\frac{1}{2}a^{4}$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{6}-\frac{1}{4}a^{5}+\frac{1}{4}a^{4}-\frac{1}{2}a^{3}-\frac{1}{2}a^{2}-\frac{1}{2}a-\frac{1}{2}$, $\frac{1}{16}a^{8}+\frac{1}{8}a^{6}-\frac{1}{2}a^{5}+\frac{3}{16}a^{4}-\frac{1}{2}a^{3}+\frac{1}{8}$, $\frac{1}{16}a^{9}-\frac{1}{8}a^{7}-\frac{1}{4}a^{6}+\frac{7}{16}a^{5}+\frac{1}{4}a^{4}-\frac{1}{2}a^{3}-\frac{1}{2}a^{2}-\frac{3}{8}a-\frac{1}{2}$, $\frac{1}{25888}a^{10}+\frac{309}{12944}a^{8}-\frac{1789}{25888}a^{6}+\frac{1549}{3236}a^{4}-\frac{1}{2}a^{3}+\frac{5489}{12944}a^{2}-\frac{1}{2}a+\frac{495}{1618}$, $\frac{1}{25888}a^{11}+\frac{309}{12944}a^{9}-\frac{1789}{25888}a^{7}+\frac{1549}{3236}a^{5}-\frac{1}{2}a^{4}+\frac{5489}{12944}a^{3}-\frac{1}{2}a^{2}+\frac{495}{1618}a$ 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:  $C_{3}$, which has order $3$
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:  $C_{6}$, which has order $6$
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:  $6$
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:   $\frac{51}{25888}a^{11}+\frac{103}{6472}a^{10}-\frac{421}{12944}a^{9}-\frac{533}{3236}a^{8}+\frac{5841}{25888}a^{7}+\frac{5039}{6472}a^{6}-\frac{1901}{3236}a^{5}+\frac{1505}{3236}a^{4}+\frac{1643}{12944}a^{3}+\frac{2303}{3236}a^{2}-\frac{2261}{1618}a+\frac{881}{1618}$, $\frac{103}{3236}a^{10}-\frac{533}{1618}a^{8}+\frac{5039}{3236}a^{6}+\frac{1505}{1618}a^{4}+\frac{2303}{1618}a^{2}+\frac{72}{809}$, $\frac{281}{25888}a^{11}-\frac{107}{6472}a^{10}-\frac{169}{1618}a^{9}+\frac{1021}{6472}a^{8}+\frac{11815}{25888}a^{7}-\frac{4355}{6472}a^{6}+\frac{7389}{12944}a^{5}-\frac{8083}{6472}a^{4}+\frac{15017}{12944}a^{3}-\frac{3225}{3236}a^{2}+\frac{2215}{6472}a-\frac{613}{3236}$, $\frac{463}{25888}a^{11}+\frac{465}{12944}a^{10}-\frac{2553}{12944}a^{9}-\frac{4679}{12944}a^{8}+\frac{25997}{25888}a^{7}+\frac{20801}{12944}a^{6}-\frac{99}{809}a^{5}+\frac{25661}{12944}a^{4}+\frac{10855}{12944}a^{3}-\frac{819}{6472}a^{2}-\frac{690}{809}a-\frac{10401}{6472}$, $\frac{281}{25888}a^{11}+\frac{107}{6472}a^{10}-\frac{169}{1618}a^{9}-\frac{1021}{6472}a^{8}+\frac{11815}{25888}a^{7}+\frac{4355}{6472}a^{6}+\frac{7389}{12944}a^{5}+\frac{8083}{6472}a^{4}+\frac{15017}{12944}a^{3}+\frac{3225}{3236}a^{2}+\frac{2215}{6472}a+\frac{613}{3236}$, $\frac{859}{25888}a^{11}+\frac{1041}{25888}a^{10}-\frac{1983}{6472}a^{9}-\frac{5167}{12944}a^{8}+\frac{32709}{25888}a^{7}+\frac{46891}{25888}a^{6}+\frac{32313}{12944}a^{5}+\frac{5835}{3236}a^{4}+\frac{55211}{12944}a^{3}+\frac{44577}{12944}a^{2}+\frac{1111}{6472}a+\frac{771}{1618}$ 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:  \( 7226.98242316 \)
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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{2}\cdot(2\pi)^{5}\cdot 7226.98242316 \cdot 3}{2\cdot\sqrt{173317422340636672}}\cr\approx \mathstrut & 1.01996784342 \end{aligned}\]

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 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28) 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 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28, 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 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28); 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 - 10*x^10 + 45*x^8 + 48*x^6 + 56*x^4 - 56*x^2 - 28); 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

$C_6^2:C_4$ (as 12T82):

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 144
The 18 conjugacy class representatives for $C_6^2:C_4$
Character table for $C_6^2:C_4$

Intermediate fields

\(\Q(\sqrt{2}) \), 4.2.1792.1, 6.2.39337984.1

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

Degree 12 siblings: data not computed
Degree 24 siblings: data not computed
Degree 36 siblings: data not computed
Minimal sibling: 12.2.72185515343872.1

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type R ${\href{/padicField/3.4.0.1}{4} }^{3}$ ${\href{/padicField/5.4.0.1}{4} }^{3}$ R ${\href{/padicField/11.4.0.1}{4} }^{2}{,}\,{\href{/padicField/11.2.0.1}{2} }^{2}$ ${\href{/padicField/13.4.0.1}{4} }^{3}$ ${\href{/padicField/17.3.0.1}{3} }^{2}{,}\,{\href{/padicField/17.2.0.1}{2} }^{3}$ ${\href{/padicField/19.4.0.1}{4} }^{3}$ ${\href{/padicField/23.6.0.1}{6} }{,}\,{\href{/padicField/23.2.0.1}{2} }^{3}$ ${\href{/padicField/29.4.0.1}{4} }^{2}{,}\,{\href{/padicField/29.2.0.1}{2} }^{2}$ ${\href{/padicField/31.2.0.1}{2} }^{5}{,}\,{\href{/padicField/31.1.0.1}{1} }^{2}$ ${\href{/padicField/37.4.0.1}{4} }^{2}{,}\,{\href{/padicField/37.2.0.1}{2} }^{2}$ ${\href{/padicField/41.2.0.1}{2} }^{5}{,}\,{\href{/padicField/41.1.0.1}{1} }^{2}$ ${\href{/padicField/43.4.0.1}{4} }^{2}{,}\,{\href{/padicField/43.2.0.1}{2} }^{2}$ ${\href{/padicField/47.2.0.1}{2} }^{5}{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ ${\href{/padicField/53.4.0.1}{4} }^{2}{,}\,{\href{/padicField/53.2.0.1}{2} }^{2}$ ${\href{/padicField/59.4.0.1}{4} }^{3}$

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 2.1.4.8b1.6$x^{4} + 4 x^{3} + 2 x^{2} + 4 x + 14$$4$$1$$8$$C_2^2$$$[2, 3]$$
2.1.8.24c1.61$x^{8} + 8 x^{7} + 4 x^{6} + 2 x^{4} + 8 x^{3} + 4 x^{2} + 8 x + 14$$8$$1$$24$$C_4\times C_2$$$[2, 3, 4]$$
\(7\) Copy content Toggle raw display 7.1.3.2a1.1$x^{3} + 7$$3$$1$$2$$C_3$$$[\ ]_{3}$$
7.1.3.2a1.1$x^{3} + 7$$3$$1$$2$$C_3$$$[\ ]_{3}$$
7.1.6.5a1.4$x^{6} + 28$$6$$1$$5$$C_6$$$[\ ]_{6}$$

Spectrum of ring of integers

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