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Properties

Label 12.0.218...776.16
Degree $12$
Signature $[0, 6]$
Discriminant $2.190\times 10^{17}$
Root discriminant \(27.86\)
Ramified primes $2,13$
Class number $4$
Class group [4]
Galois group $C_4^2:D_6$ (as 12T97)

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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 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 16)
 
Copy content gp:K = bnfinit(y^12 - 2*y^11 + y^10 + 20*y^9 - 26*y^8 - 16*y^7 + 92*y^6 - 112*y^5 + 160*y^4 - 176*y^3 + 120*y^2 - 32*y + 16, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^12 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 16);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^12 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 16)
 

\( x^{12} - 2 x^{11} + x^{10} + 20 x^{9} - 26 x^{8} - 16 x^{7} + 92 x^{6} - 112 x^{5} + 160 x^{4} + \cdots + 16 \) 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:  $[0, 6]$
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:   \(218971048064843776\) \(\medspace = 2^{28}\cdot 13^{8}\) 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:  \(27.86\)
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:  $2^{11/4}13^{7/8}\approx 63.46480081404899$
Ramified primes:   \(2\), \(13\) 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:  \(\Q\)
$\Aut(K/\Q)$:   $C_2$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $\frac{1}{2}a^{5}-\frac{1}{2}a^{3}$, $\frac{1}{2}a^{6}-\frac{1}{2}a^{4}$, $\frac{1}{2}a^{7}-\frac{1}{2}a^{3}$, $\frac{1}{4}a^{8}-\frac{1}{4}a^{6}-\frac{1}{2}a^{3}$, $\frac{1}{4}a^{9}-\frac{1}{4}a^{7}-\frac{1}{2}a^{4}$, $\frac{1}{8}a^{10}-\frac{1}{8}a^{8}-\frac{1}{4}a^{7}$, $\frac{1}{31501048}a^{11}+\frac{1875301}{31501048}a^{10}+\frac{280639}{31501048}a^{9}+\frac{3024963}{31501048}a^{8}+\frac{826015}{15750524}a^{7}+\frac{3748447}{15750524}a^{6}+\frac{1615197}{7875262}a^{5}-\frac{1714204}{3937631}a^{4}-\frac{1456440}{3937631}a^{3}+\frac{564450}{3937631}a^{2}+\frac{812945}{3937631}a+\frac{1353585}{3937631}$ 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:  No
Index:  Not computed
Inessential primes:  $2$

Class group and class number

Ideal class group:  $C_{4}$, which has order $4$
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:  $C_{4}$, 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:  $5$
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:   $\frac{833471}{15750524}a^{11}-\frac{2124631}{15750524}a^{10}+\frac{1311307}{15750524}a^{9}+\frac{16809369}{15750524}a^{8}-\frac{7772065}{3937631}a^{7}-\frac{4819531}{7875262}a^{6}+\frac{22572507}{3937631}a^{5}-\frac{64723593}{7875262}a^{4}+\frac{39889714}{3937631}a^{3}-\frac{42704753}{3937631}a^{2}+\frac{27956588}{3937631}a-\frac{5441443}{3937631}$, $\frac{1914325}{15750524}a^{11}-\frac{2595875}{15750524}a^{10}-\frac{369441}{15750524}a^{9}+\frac{19416217}{7875262}a^{8}-\frac{12692105}{7875262}a^{7}-\frac{59038877}{15750524}a^{6}+\frac{72949325}{7875262}a^{5}-\frac{28862457}{3937631}a^{4}+\frac{45633602}{3937631}a^{3}-\frac{40030278}{3937631}a^{2}+\frac{12951348}{3937631}a+\frac{12236161}{3937631}$, $\frac{375953}{15750524}a^{11}+\frac{81565}{15750524}a^{10}-\frac{874339}{7875262}a^{9}+\frac{8830367}{15750524}a^{8}+\frac{7034591}{15750524}a^{7}-\frac{9275877}{3937631}a^{6}+\frac{12474307}{7875262}a^{5}+\frac{12045823}{3937631}a^{4}-\frac{34647353}{7875262}a^{3}+\frac{23347782}{3937631}a^{2}-\frac{31426163}{3937631}a+\frac{21011333}{3937631}$, $\frac{378693}{31501048}a^{11}-\frac{101075}{15750524}a^{10}-\frac{635863}{31501048}a^{9}+\frac{2128933}{7875262}a^{8}+\frac{691755}{15750524}a^{7}-\frac{2318340}{3937631}a^{6}+\frac{7948505}{7875262}a^{5}+\frac{5520207}{7875262}a^{4}-\frac{3255131}{7875262}a^{3}+\frac{2902646}{3937631}a^{2}-\frac{7098850}{3937631}a+\frac{8111349}{3937631}$, $\frac{4796917}{31501048}a^{11}-\frac{2085023}{7875262}a^{10}-\frac{3171579}{31501048}a^{9}+\frac{46941921}{15750524}a^{8}-\frac{49677449}{15750524}a^{7}-\frac{52191413}{7875262}a^{6}+\frac{37248803}{3937631}a^{5}-\frac{49745436}{3937631}a^{4}+\frac{65698617}{3937631}a^{3}-\frac{56717821}{3937631}a^{2}+\frac{12580239}{3937631}a-\frac{8367887}{3937631}$ 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:  \( 8168.83020863 \)
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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{6}\cdot 8168.83020863 \cdot 4}{2\cdot\sqrt{218971048064843776}}\cr\approx \mathstrut & 2.14820501698 \end{aligned}\]

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 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 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 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 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 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 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 - 2*x^11 + x^10 + 20*x^9 - 26*x^8 - 16*x^7 + 92*x^6 - 112*x^5 + 160*x^4 - 176*x^3 + 120*x^2 - 32*x + 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

$C_4^2:D_6$ (as 12T97):

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 192
The 20 conjugacy class representatives for $C_4^2:D_6$
Character table for $C_4^2:D_6$

Intermediate fields

3.1.104.1, 6.0.4499456.3

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 24 siblings: data not computed
Degree 32 siblings: data not computed
Minimal sibling: 12.0.9251526780739649536.23

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type R ${\href{/padicField/3.6.0.1}{6} }^{2}$ ${\href{/padicField/5.3.0.1}{3} }^{4}$ ${\href{/padicField/7.6.0.1}{6} }^{2}$ ${\href{/padicField/11.8.0.1}{8} }{,}\,{\href{/padicField/11.2.0.1}{2} }{,}\,{\href{/padicField/11.1.0.1}{1} }^{2}$ R ${\href{/padicField/17.3.0.1}{3} }^{4}$ ${\href{/padicField/19.2.0.1}{2} }^{6}$ ${\href{/padicField/23.8.0.1}{8} }{,}\,{\href{/padicField/23.2.0.1}{2} }{,}\,{\href{/padicField/23.1.0.1}{1} }^{2}$ ${\href{/padicField/29.8.0.1}{8} }{,}\,{\href{/padicField/29.2.0.1}{2} }{,}\,{\href{/padicField/29.1.0.1}{1} }^{2}$ ${\href{/padicField/31.4.0.1}{4} }^{2}{,}\,{\href{/padicField/31.1.0.1}{1} }^{4}$ ${\href{/padicField/37.3.0.1}{3} }^{4}$ ${\href{/padicField/41.4.0.1}{4} }^{2}{,}\,{\href{/padicField/41.2.0.1}{2} }^{2}$ ${\href{/padicField/43.6.0.1}{6} }^{2}$ ${\href{/padicField/47.6.0.1}{6} }^{2}$ ${\href{/padicField/53.8.0.1}{8} }{,}\,{\href{/padicField/53.2.0.1}{2} }{,}\,{\href{/padicField/53.1.0.1}{1} }^{2}$ ${\href{/padicField/59.2.0.1}{2} }^{6}$

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 2.1.2.3a1.2$x^{2} + 10$$2$$1$$3$$C_2$$$[3]$$
2.1.2.3a1.2$x^{2} + 10$$2$$1$$3$$C_2$$$[3]$$
2.1.8.22d1.25$x^{8} + 4 x^{7} + 2 x^{4} + 4 x^{2} + 8 x + 14$$8$$1$$22$$Q_8:C_2$$$[2, 3, \frac{7}{2}]^{2}$$
\(13\) Copy content Toggle raw display 13.2.1.0a1.1$x^{2} + 12 x + 2$$1$$2$$0$$C_2$$$[\ ]^{2}$$
13.1.2.1a1.1$x^{2} + 13$$2$$1$$1$$C_2$$$[\ ]_{2}$$
13.1.8.7a1.4$x^{8} + 104$$8$$1$$7$$C_8:C_2$$$[\ ]_{8}^{2}$$

Spectrum of ring of integers

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