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Properties

Label 9.9.3691950281939241.2
Degree $9$
Signature $(9, 0)$
Discriminant $3.692\times 10^{15}$
Root discriminant \(53.67\)
Ramified primes $3,7$
Class number $3$
Class group [3]
Galois group $C_9$ (as 9T1)

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Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831)
 
Copy content gp:K = bnfinit(y^9 - 63*y^7 + 1323*y^5 - 10290*y^3 + 21609*y - 5831, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831)
 

\( x^{9} - 63x^{7} + 1323x^{5} - 10290x^{3} + 21609x - 5831 \) 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:  $9$
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:  $(9, 0)$
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:   \(3691950281939241\) \(\medspace = 3^{22}\cdot 7^{6}\) 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:  \(53.67\)
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:  $3^{22/9}7^{2/3}\approx 53.665489341339345$
Ramified primes:   \(3\), \(7\) 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:  \(\Q\)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_9$
Copy content comment:Automorphisms
 
Copy content sage:K.automorphisms()
 
Copy content magma:Automorphisms(K);
 
Copy content oscar:automorphism_group(K)
 
This field is Galois and abelian over $\Q$.
Conductor:  \(189=3^{3}\cdot 7\)
Dirichlet character group:    $\lbrace$$\chi_{189}(64,·)$, $\chi_{189}(1,·)$, $\chi_{189}(184,·)$, $\chi_{189}(25,·)$, $\chi_{189}(151,·)$, $\chi_{189}(88,·)$, $\chi_{189}(121,·)$, $\chi_{189}(58,·)$, $\chi_{189}(127,·)$$\rbrace$
This is not a CM field.
This field has no CM subfields.

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

$1$, $a$, $a^{2}$, $\frac{1}{7}a^{3}$, $\frac{1}{7}a^{4}$, $\frac{1}{133}a^{5}-\frac{8}{133}a^{4}+\frac{3}{133}a^{3}-\frac{6}{19}a^{2}-\frac{3}{19}a+\frac{2}{19}$, $\frac{1}{931}a^{6}-\frac{6}{133}a^{4}-\frac{8}{133}a^{3}+\frac{9}{19}a^{2}+\frac{5}{19}a+\frac{5}{19}$, $\frac{1}{931}a^{7}+\frac{1}{133}a^{4}+\frac{5}{133}a^{3}+\frac{7}{19}a^{2}+\frac{6}{19}a-\frac{7}{19}$, $\frac{1}{931}a^{8}-\frac{6}{133}a^{4}+\frac{8}{133}a^{3}-\frac{7}{19}a^{2}-\frac{4}{19}a-\frac{2}{19}$ 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:  $C_{3}$, which has order $3$
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:  $8$
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:   $\frac{2}{931}a^{6}-\frac{12}{133}a^{4}+\frac{3}{133}a^{3}+\frac{18}{19}a^{2}-\frac{9}{19}a-\frac{9}{19}$, $\frac{1}{931}a^{6}-\frac{6}{133}a^{4}-\frac{8}{133}a^{3}+\frac{9}{19}a^{2}+\frac{24}{19}a+\frac{5}{19}$, $\frac{2}{931}a^{7}+\frac{2}{931}a^{6}-\frac{12}{133}a^{5}-\frac{9}{133}a^{4}+\frac{129}{133}a^{3}+\frac{9}{19}a^{2}-\frac{37}{19}a+\frac{10}{19}$, $\frac{1}{931}a^{7}+\frac{2}{931}a^{6}-\frac{10}{133}a^{5}-\frac{1}{19}a^{4}+\frac{206}{133}a^{3}-\frac{10}{19}a^{2}-\frac{163}{19}a+\frac{192}{19}$, $\frac{1}{931}a^{8}-\frac{55}{931}a^{6}+\frac{1}{133}a^{5}+\frac{18}{19}a^{4}-\frac{43}{133}a^{3}-\frac{71}{19}a^{2}+\frac{60}{19}a+\frac{10}{19}$, $\frac{1}{931}a^{8}-\frac{3}{49}a^{6}-\frac{2}{133}a^{5}+\frac{143}{133}a^{4}+\frac{78}{133}a^{3}-\frac{109}{19}a^{2}-\frac{112}{19}a+\frac{32}{19}$, $\frac{1}{931}a^{8}+\frac{3}{931}a^{7}-\frac{40}{931}a^{6}-\frac{15}{133}a^{5}+\frac{72}{133}a^{4}+\frac{146}{133}a^{3}-\frac{47}{19}a^{2}-\frac{46}{19}a+\frac{89}{19}$, $\frac{1}{931}a^{8}+\frac{4}{931}a^{7}-\frac{44}{931}a^{6}-\frac{23}{133}a^{5}+\frac{85}{133}a^{4}+\frac{39}{19}a^{3}-\frac{47}{19}a^{2}-\frac{112}{19}a+\frac{46}{19}$ 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:  \( 40597.2195867 \)
Copy content comment:Regulator
 
Copy content sage:K.regulator()
 
Copy content gp:K.reg
 
Copy content magma:Regulator(K);
 
Copy content oscar:regulator(K)
 
Unit signature rank:  \( 9 \)

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{9}\cdot(2\pi)^{0}\cdot 40597.2195867 \cdot 3}{2\cdot\sqrt{3691950281939241}}\cr\approx \mathstrut & 0.513132578690 \end{aligned}\]

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^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831) 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^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831, 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^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831); 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^9 - 63*x^7 + 1323*x^5 - 10290*x^3 + 21609*x - 5831); 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

$C_9$ (as 9T1):

Copy content comment:Galois group
 
Copy content sage:K.galois_group()
 
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 cyclic group of order 9
The 9 conjugacy class representatives for $C_9$
Character table for $C_9$

Intermediate fields

\(\Q(\zeta_{9})^+\)

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]
 

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type ${\href{/padicField/2.9.0.1}{9} }$ R ${\href{/padicField/5.9.0.1}{9} }$ R ${\href{/padicField/11.9.0.1}{9} }$ ${\href{/padicField/13.9.0.1}{9} }$ ${\href{/padicField/17.1.0.1}{1} }^{9}$ ${\href{/padicField/19.1.0.1}{1} }^{9}$ ${\href{/padicField/23.9.0.1}{9} }$ ${\href{/padicField/29.9.0.1}{9} }$ ${\href{/padicField/31.9.0.1}{9} }$ ${\href{/padicField/37.3.0.1}{3} }^{3}$ ${\href{/padicField/41.9.0.1}{9} }$ ${\href{/padicField/43.9.0.1}{9} }$ ${\href{/padicField/47.9.0.1}{9} }$ ${\href{/padicField/53.3.0.1}{3} }^{3}$ ${\href{/padicField/59.9.0.1}{9} }$

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
\(3\) Copy content Toggle raw display 3.1.9.22a3.8$x^{9} + 18 x^{8} + 9 x^{7} + 6 x^{6} + 18 x^{5} + 57$$9$$1$$22$$C_9$$$[2, 3]$$
\(7\) Copy content Toggle raw display 7.3.3.6a1.2$x^{9} + 18 x^{8} + 108 x^{7} + 228 x^{6} + 144 x^{5} + 432 x^{4} + 48 x^{3} + 288 x^{2} + 7 x + 64$$3$$3$$6$$C_9$$$[\ ]_{3}^{3}$$

Artin representations

Label Dimension Conductor Artin stem field $G$ Ind $\chi(c)$
*9 1.1.1t1.a.a$1$ $1$ \(\Q\) $C_1$ $1$ $1$
*9 1.189.9t1.b.a$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$
*9 1.189.9t1.b.b$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$
*9 1.9.3t1.a.a$1$ $ 3^{2}$ \(\Q(\zeta_{9})^+\) $C_3$ (as 3T1) $0$ $1$
*9 1.189.9t1.b.c$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$
*9 1.189.9t1.b.d$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$
*9 1.9.3t1.a.b$1$ $ 3^{2}$ \(\Q(\zeta_{9})^+\) $C_3$ (as 3T1) $0$ $1$
*9 1.189.9t1.b.e$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$
*9 1.189.9t1.b.f$1$ $ 3^{3} \cdot 7 $ 9.9.3691950281939241.2 $C_9$ (as 9T1) $0$ $1$

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 *.

Spectrum of ring of integers

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