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Properties

Label 9.1.937789413817...8976.1
Degree $9$
Signature $[1, 4]$
Discriminant $2^{6}\cdot 3^{15}\cdot 17^{7}\cdot 59^{7}$
Root discriminant $2139.11$
Ramified primes $2, 3, 17, 59$
Class number $151632$ (GRH)
Class group $[6, 6, 4212]$ (GRH)
Galois group $S_3^2$ (as 9T8)

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-1686858625, -538282800, -23935500, 4127133, 280530, 24300, -2955, 270, 0, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^9 + 270*x^7 - 2955*x^6 + 24300*x^5 + 280530*x^4 + 4127133*x^3 - 23935500*x^2 - 538282800*x - 1686858625)
 
gp: K = bnfinit(x^9 + 270*x^7 - 2955*x^6 + 24300*x^5 + 280530*x^4 + 4127133*x^3 - 23935500*x^2 - 538282800*x - 1686858625, 1)
 

Normalized defining polynomial

\( x^{9} + 270 x^{7} - 2955 x^{6} + 24300 x^{5} + 280530 x^{4} + 4127133 x^{3} - 23935500 x^{2} - 538282800 x - 1686858625 \)

magma: DefiningPolynomial(K);
 
sage: K.defining_polynomial()
 
gp: K.pol
 

Invariants

Degree:  $9$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[1, 4]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(937789413817123972561566758976=2^{6}\cdot 3^{15}\cdot 17^{7}\cdot 59^{7}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $2139.11$
magma: Abs(Discriminant(Integers(K)))^(1/Degree(K));
 
sage: (K.disc().abs())^(1./K.degree())
 
gp: abs(K.disc)^(1/poldegree(K.pol))
 
Ramified primes:  $2, 3, 17, 59$
magma: PrimeDivisors(Discriminant(Integers(K)));
 
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
This field is not Galois over $\Q$.
This is not a CM field.

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

$1$, $a$, $a^{2}$, $\frac{1}{3} a^{3} - \frac{1}{3}$, $\frac{1}{9} a^{4} - \frac{1}{9} a^{3} - \frac{4}{9} a + \frac{4}{9}$, $\frac{1}{9} a^{5} - \frac{1}{9} a^{3} - \frac{4}{9} a^{2} + \frac{4}{9}$, $\frac{1}{27081} a^{6} + \frac{100}{9027} a^{5} + \frac{10}{3009} a^{4} + \frac{3913}{27081} a^{3} + \frac{797}{9027} a^{2} - \frac{1363}{3009} a - \frac{2654}{27081}$, $\frac{1}{135405} a^{7} + \frac{8}{3009} a^{5} + \frac{197}{27081} a^{4} + \frac{334}{9027} a^{3} + \frac{1039}{3009} a^{2} + \frac{60628}{135405} a + \frac{2930}{9027}$, $\frac{1}{11212527941079525} a^{8} + \frac{962226041}{2242505588215905} a^{7} - \frac{1806454358}{131912093424465} a^{6} - \frac{63823937265241}{2242505588215905} a^{5} + \frac{16296433481206}{448501117643181} a^{4} + \frac{112539745231901}{2242505588215905} a^{3} + \frac{306453414486899}{659560467122325} a^{2} + \frac{321621289782173}{2242505588215905} a - \frac{191214015754541}{448501117643181}$

magma: IntegralBasis(K);
 
sage: K.integral_basis()
 
gp: K.zk
 

Class group and class number

$C_{6}\times C_{6}\times C_{4212}$, which has order $151632$ (assuming GRH)

magma: ClassGroup(K);
 
sage: K.class_group().invariants()
 
gp: K.clgp
 

Unit group

magma: UK, f := UnitGroup(K);
 
sage: UK = K.unit_group()
 
Rank:  $4$
magma: UnitRank(K);
 
sage: UK.rank()
 
gp: K.fu
 
Torsion generator:  \( -1 \) (order $2$)
magma: K!f(TU.1) where TU,f is TorsionUnitGroup(K);
 
sage: UK.torsion_generator()
 
gp: K.tu[2]
 
Fundamental units:  Units are too long to display, but can be downloaded with other data for this field from 'Stored data to gp' link to the right (assuming GRH)
magma: [K!f(g): g in Generators(UK)];
 
sage: UK.fundamental_units()
 
gp: K.fu
 
Regulator:  \( 3993151.1525716246 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

$S_3^2$ (as 9T8):

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 36
The 9 conjugacy class representatives for $S_3^2$
Character table for $S_3^2$

Intermediate fields

3.1.324972.2, 3.1.27162243.2

Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.

Sibling fields

Galois closure: data not computed
Degree 6 sibling: data not computed
Degree 12 sibling: data not computed
Degree 18 siblings: data not computed

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 ${\href{/LocalNumberField/5.2.0.1}{2} }^{4}{,}\,{\href{/LocalNumberField/5.1.0.1}{1} }$ ${\href{/LocalNumberField/7.6.0.1}{6} }{,}\,{\href{/LocalNumberField/7.3.0.1}{3} }$ ${\href{/LocalNumberField/11.6.0.1}{6} }{,}\,{\href{/LocalNumberField/11.3.0.1}{3} }$ ${\href{/LocalNumberField/13.6.0.1}{6} }{,}\,{\href{/LocalNumberField/13.3.0.1}{3} }$ R ${\href{/LocalNumberField/19.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/23.6.0.1}{6} }{,}\,{\href{/LocalNumberField/23.3.0.1}{3} }$ ${\href{/LocalNumberField/29.2.0.1}{2} }^{4}{,}\,{\href{/LocalNumberField/29.1.0.1}{1} }$ ${\href{/LocalNumberField/31.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/37.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/41.2.0.1}{2} }^{4}{,}\,{\href{/LocalNumberField/41.1.0.1}{1} }$ ${\href{/LocalNumberField/43.6.0.1}{6} }{,}\,{\href{/LocalNumberField/43.3.0.1}{3} }$ ${\href{/LocalNumberField/47.2.0.1}{2} }^{4}{,}\,{\href{/LocalNumberField/47.1.0.1}{1} }$ ${\href{/LocalNumberField/53.6.0.1}{6} }{,}\,{\href{/LocalNumberField/53.3.0.1}{3} }$ R

In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.

magma: p := 7; // to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
magma: idealfactors := Factorization(p*Integers(K)); // get the data
 
magma: [<primefactor[2], Valuation(Norm(primefactor[1]), p)> : primefactor in idealfactors];
 
sage: p = 7; # to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
sage: [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
 
gp: p = 7; \\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
gp: idealfactors = idealprimedec(K, p); \\ get the data
 
gp: vector(length(idealfactors), j, [idealfactors[j][3], idealfactors[j][4]])
 

Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
$2$2.3.2.1$x^{3} - 2$$3$$1$$2$$S_3$$[\ ]_{3}^{2}$
2.6.4.1$x^{6} + 3 x^{5} + 6 x^{4} + 3 x^{3} + 9 x + 9$$3$$2$$4$$S_3$$[\ ]_{3}^{2}$
$3$3.9.15.15$x^{9} + 3 x^{8} + 3 x^{7} + 3 x^{3} + 6$$9$$1$$15$$S_3^2$$[3/2, 2]_{2}^{2}$
$17$17.3.2.1$x^{3} - 17$$3$$1$$2$$S_3$$[\ ]_{3}^{2}$
17.6.5.1$x^{6} - 17$$6$$1$$5$$D_{6}$$[\ ]_{6}^{2}$
$59$59.3.2.1$x^{3} - 59$$3$$1$$2$$S_3$$[\ ]_{3}^{2}$
59.6.5.2$x^{6} + 177$$6$$1$$5$$D_{6}$$[\ ]_{6}^{2}$