Properties

Label 6.0.754951232.1
Degree $6$
Signature $[0, 3]$
Discriminant $-754951232$
Root discriminant \(30.18\)
Ramified primes see page
Class number $36$
Class group $[3, 12]$
Galois group $S_3$ (as 6T2)

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Show commands: SageMath / Pari/GP / Magma

Normalized defining polynomial

sage: x = polygen(QQ); K.<a> = NumberField(x^6 + x^4 - 72*x^2 + 272)
 
gp: K = bnfinit(x^6 + x^4 - 72*x^2 + 272, 1)
 
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![272, 0, -72, 0, 1, 0, 1]);
 

\( x^{6} + x^{4} - 72x^{2} + 272 \) Copy content Toggle raw display

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

Invariants

Degree:  $6$
sage: K.degree()
 
gp: poldegree(K.pol)
 
magma: Degree(K);
 
Signature:  $[0, 3]$
sage: K.signature()
 
gp: K.sign
 
magma: Signature(K);
 
Discriminant:   \(-754951232\) \(\medspace = -\,2^{6}\cdot 7^{4}\cdot 17^{3}\) Copy content Toggle raw display
sage: K.disc()
 
gp: K.disc
 
magma: Discriminant(Integers(K));
 
Root discriminant:  \(30.18\)
sage: (K.disc().abs())^(1./K.degree())
 
gp: abs(K.disc)^(1/poldegree(K.pol))
 
magma: Abs(Discriminant(Integers(K)))^(1/Degree(K));
 
Ramified primes:   \(2\), \(7\), \(17\) Copy content Toggle raw display
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
magma: PrimeDivisors(Discriminant(Integers(K)));
 
$\card{ \Gal(K/\Q) }$:  $6$
This field is Galois over $\Q$.
This is not a CM field.

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

$1$, $a$, $a^{2}$, $\frac{1}{2}a^{3}-\frac{1}{2}a$, $\frac{1}{32}a^{4}-\frac{1}{4}a^{3}+\frac{13}{32}a^{2}-\frac{1}{4}a-\frac{3}{8}$, $\frac{1}{64}a^{5}+\frac{13}{64}a^{3}-\frac{1}{2}a^{2}+\frac{5}{16}a-\frac{1}{2}$ Copy content Toggle raw display

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

Monogenic:  No
Index:  $8$
Inessential primes:  $2$

Class group and class number

$C_{3}\times C_{12}$, which has order $36$

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

Unit group

sage: UK = K.unit_group()
 
magma: UK, f := UnitGroup(K);
 
Rank:  $2$
sage: UK.rank()
 
gp: K.fu
 
magma: UnitRank(K);
 
Torsion generator:   \( -1 \)  (order $2$) Copy content Toggle raw display
sage: UK.torsion_generator()
 
gp: K.tu[2]
 
magma: K!f(TU.1) where TU,f is TorsionUnitGroup(K);
 
Fundamental units:   $\frac{1}{64}a^{5}+\frac{1}{32}a^{4}-\frac{3}{64}a^{3}-\frac{3}{32}a^{2}+\frac{1}{16}a+\frac{1}{8}$, $\frac{1}{16}a^{5}-\frac{1}{8}a^{4}+\frac{5}{16}a^{3}-\frac{5}{8}a^{2}-\frac{13}{4}a+\frac{15}{2}$ Copy content Toggle raw display
sage: UK.fundamental_units()
 
gp: K.fu
 
magma: [K!f(g): g in Generators(UK)];
 
Regulator:  \( 18.3805689725 \)
sage: K.regulator()
 
gp: K.reg
 
magma: Regulator(K);
 

Class number formula

$\displaystyle\lim_{s\to 1} (s-1)\zeta_K(s) \approx\frac{2^{0}\cdot(2\pi)^{3}\cdot 18.3805689725 \cdot 36}{2\sqrt{754951232}}\approx 2.98683761476$

Galois group

$S_3$ (as 6T2):

sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
magma: GaloisGroup(K);
 
A solvable group of order 6
The 3 conjugacy class representatives for $S_3$
Character table for $S_3$

Intermediate fields

\(\Q(\sqrt{-17}) \), 3.1.3332.1 x3

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

Sibling algebras

Twin sextic algebra: 3.1.3332.1 $\times$ \(\Q\) $\times$ \(\Q\) $\times$ \(\Q\)
Degree 3 sibling: 3.1.3332.1

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type R ${\href{/padicField/3.3.0.1}{3} }^{2}$ ${\href{/padicField/5.2.0.1}{2} }^{3}$ R ${\href{/padicField/11.3.0.1}{3} }^{2}$ ${\href{/padicField/13.3.0.1}{3} }^{2}$ R ${\href{/padicField/19.2.0.1}{2} }^{3}$ ${\href{/padicField/23.1.0.1}{1} }^{6}$ ${\href{/padicField/29.2.0.1}{2} }^{3}$ ${\href{/padicField/31.1.0.1}{1} }^{6}$ ${\href{/padicField/37.2.0.1}{2} }^{3}$ ${\href{/padicField/41.2.0.1}{2} }^{3}$ ${\href{/padicField/43.2.0.1}{2} }^{3}$ ${\href{/padicField/47.2.0.1}{2} }^{3}$ ${\href{/padicField/53.3.0.1}{3} }^{2}$ ${\href{/padicField/59.2.0.1}{2} }^{3}$

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

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]])
 
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];
 

Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
\(2\) Copy content Toggle raw display 2.2.2.1$x^{2} + 2 x + 2$$2$$1$$2$$C_2$$[2]$
2.2.2.1$x^{2} + 2 x + 2$$2$$1$$2$$C_2$$[2]$
2.2.2.1$x^{2} + 2 x + 2$$2$$1$$2$$C_2$$[2]$
\(7\) Copy content Toggle raw display 7.3.2.2$x^{3} - 7$$3$$1$$2$$C_3$$[\ ]_{3}$
7.3.2.2$x^{3} - 7$$3$$1$$2$$C_3$$[\ ]_{3}$
\(17\) Copy content Toggle raw display 17.2.1.1$x^{2} - 17$$2$$1$$1$$C_2$$[\ ]_{2}$
17.2.1.1$x^{2} - 17$$2$$1$$1$$C_2$$[\ ]_{2}$
17.2.1.1$x^{2} - 17$$2$$1$$1$$C_2$$[\ ]_{2}$