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Properties

Label 9.1.89526025681.1
Degree $9$
Signature $[1, 4]$
Discriminant $547^{4}$
Root discriminant $16.48$
Ramified prime $547$
Class number $3$
Class group $[3]$
Galois group $(C_3^2:Q_8):C_3$ (as 9T23)

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-1, 4, 0, -3, -13, 15, 1, 0, -3, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^9 - 3*x^8 + x^6 + 15*x^5 - 13*x^4 - 3*x^3 + 4*x - 1)
 
gp: K = bnfinit(x^9 - 3*x^8 + x^6 + 15*x^5 - 13*x^4 - 3*x^3 + 4*x - 1, 1)
 

Normalized defining polynomial

\( x^{9} - 3 x^{8} + x^{6} + 15 x^{5} - 13 x^{4} - 3 x^{3} + 4 x - 1 \)

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:  \(89526025681=547^{4}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $16.48$
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:  $547$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $\frac{1}{2} a^{6} - \frac{1}{2} a^{5} - \frac{1}{2} a^{4} - \frac{1}{2} a^{3} - \frac{1}{2} a^{2} - \frac{1}{2} a - \frac{1}{2}$, $\frac{1}{2} a^{7} - \frac{1}{2}$, $\frac{1}{14} a^{8} + \frac{1}{14} a^{7} - \frac{3}{14} a^{6} + \frac{3}{14} a^{5} - \frac{1}{14} a^{4} - \frac{3}{14} a^{3} - \frac{1}{14} a^{2} - \frac{2}{7} a + \frac{1}{7}$

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

Class group and class number

$C_{3}$, which has order $3$

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:  \( a \),  \( a - 1 \),  \( \frac{8}{7} a^{8} - \frac{33}{14} a^{7} - \frac{17}{7} a^{6} - \frac{4}{7} a^{5} + \frac{118}{7} a^{4} + \frac{4}{7} a^{3} - \frac{36}{7} a^{2} - \frac{32}{7} a + \frac{11}{14} \),  \( \frac{25}{14} a^{8} - \frac{59}{14} a^{7} - \frac{33}{14} a^{6} - \frac{9}{14} a^{5} + \frac{367}{14} a^{4} - \frac{89}{14} a^{3} - \frac{67}{14} a^{2} - \frac{36}{7} a + \frac{18}{7} \)
magma: [K!f(g): g in Generators(UK)];
 
sage: UK.fundamental_units()
 
gp: K.fu
 
Regulator:  \( 32.0889781804 \)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

$ASL(2,3)$ (as 9T23):

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 216
The 10 conjugacy class representatives for $(C_3^2:Q_8):C_3$
Character table for $(C_3^2:Q_8):C_3$

Intermediate fields

The extension is primitive: there are no intermediate fields between this field and $\Q$.

Sibling fields

Degree 12 sibling: data not computed
Degree 24 siblings: data not computed
Degree 27 sibling: data not computed
Degree 36 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 ${\href{/LocalNumberField/2.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/3.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/3.1.0.1}{1} }$ ${\href{/LocalNumberField/5.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/7.6.0.1}{6} }{,}\,{\href{/LocalNumberField/7.2.0.1}{2} }{,}\,{\href{/LocalNumberField/7.1.0.1}{1} }$ ${\href{/LocalNumberField/11.6.0.1}{6} }{,}\,{\href{/LocalNumberField/11.2.0.1}{2} }{,}\,{\href{/LocalNumberField/11.1.0.1}{1} }$ ${\href{/LocalNumberField/13.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/17.6.0.1}{6} }{,}\,{\href{/LocalNumberField/17.2.0.1}{2} }{,}\,{\href{/LocalNumberField/17.1.0.1}{1} }$ ${\href{/LocalNumberField/19.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/23.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/29.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/29.1.0.1}{1} }$ ${\href{/LocalNumberField/31.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/31.1.0.1}{1} }$ ${\href{/LocalNumberField/37.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/41.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/43.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/47.6.0.1}{6} }{,}\,{\href{/LocalNumberField/47.2.0.1}{2} }{,}\,{\href{/LocalNumberField/47.1.0.1}{1} }$ ${\href{/LocalNumberField/53.3.0.1}{3} }^{3}$ ${\href{/LocalNumberField/59.6.0.1}{6} }{,}\,{\href{/LocalNumberField/59.2.0.1}{2} }{,}\,{\href{/LocalNumberField/59.1.0.1}{1} }$

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
547Data not computed

Artin representations

Label Dimension Conductor Defining polynomial of Artin field $G$ Ind $\chi(c)$
* 1.1.1t1.1c1$1$ $1$ $x$ $C_1$ $1$ $1$
1.547.3t1.1c1$1$ $ 547 $ $x^{3} - x^{2} - 182 x + 81$ $C_3$ (as 3T1) $0$ $1$
1.547.3t1.1c2$1$ $ 547 $ $x^{3} - x^{2} - 182 x + 81$ $C_3$ (as 3T1) $0$ $1$
2.547e2.24t7.2c1$2$ $ 547^{2}$ $x^{8} - 5 x^{6} - 3 x^{5} + 28 x^{4} - 12 x^{3} - 80 x^{2} + 256$ $\SL(2,3)$ (as 8T12) $-1$ $-2$
2.547.8t12.1c1$2$ $ 547 $ $x^{8} - 5 x^{6} - 3 x^{5} + 28 x^{4} - 12 x^{3} - 80 x^{2} + 256$ $\SL(2,3)$ (as 8T12) $0$ $-2$
2.547.8t12.1c2$2$ $ 547 $ $x^{8} - 5 x^{6} - 3 x^{5} + 28 x^{4} - 12 x^{3} - 80 x^{2} + 256$ $\SL(2,3)$ (as 8T12) $0$ $-2$
3.547e2.4t4.1c1$3$ $ 547^{2}$ $x^{4} - 21 x^{2} - 3 x + 100$ $A_4$ (as 4T4) $1$ $3$
* 8.547e4.9t23.1c1$8$ $ 547^{4}$ $x^{9} - 3 x^{8} + x^{6} + 15 x^{5} - 13 x^{4} - 3 x^{3} + 4 x - 1$ $(C_3^2:Q_8):C_3$ (as 9T23) $1$ $0$
8.547e6.24t569.1c1$8$ $ 547^{6}$ $x^{9} - 3 x^{8} + x^{6} + 15 x^{5} - 13 x^{4} - 3 x^{3} + 4 x - 1$ $(C_3^2:Q_8):C_3$ (as 9T23) $0$ $0$
8.547e6.24t569.1c2$8$ $ 547^{6}$ $x^{9} - 3 x^{8} + x^{6} + 15 x^{5} - 13 x^{4} - 3 x^{3} + 4 x - 1$ $(C_3^2:Q_8):C_3$ (as 9T23) $0$ $0$

Data is given for all irreducible representations of the Galois group for the Galois closure of this field. Those marked with * are summands in the permutation representation coming from this field. Representations which appear with multiplicity greater than one are indicated by exponents on the *.