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Properties

Label 10.0.207252522098163.1
Degree $10$
Signature $(0, 5)$
Discriminant $-2.073\times 10^{14}$
Root discriminant \(27.02\)
Ramified primes $3,31$
Class number $5$
Class group [5]
Galois group $C_{10}$ (as 10T1)

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Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25)
 
Copy content gp:K = bnfinit(y^10 - y^9 + 13*y^8 - 30*y^7 + 164*y^6 - 255*y^5 + 448*y^4 - 99*y^3 + 106*y^2 - 5*y + 25, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25)
 

\( x^{10} - x^{9} + 13x^{8} - 30x^{7} + 164x^{6} - 255x^{5} + 448x^{4} - 99x^{3} + 106x^{2} - 5x + 25 \) 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:  $10$
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:  $(0, 5)$
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:   \(-207252522098163\) \(\medspace = -\,3^{5}\cdot 31^{8}\) 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:  \(27.02\)
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:  $3^{1/2}31^{4/5}\approx 27.01779999660944$
Ramified primes:   \(3\), \(31\) 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:  \(\Q(\sqrt{-3}) \)
$\Aut(K/\Q)$ $=$ $\Gal(K/\Q)$:   $C_{10}$
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:  \(93=3\cdot 31\)
Dirichlet character group:    $\lbrace$$\chi_{93}(32,·)$, $\chi_{93}(1,·)$, $\chi_{93}(2,·)$, $\chi_{93}(35,·)$, $\chi_{93}(4,·)$, $\chi_{93}(70,·)$, $\chi_{93}(8,·)$, $\chi_{93}(64,·)$, $\chi_{93}(47,·)$, $\chi_{93}(16,·)$$\rbrace$
This is a CM field.
Reflex fields:  \(\Q(\sqrt{-3}) \), 10.0.207252522098163.1$^{15}$

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $\frac{1}{5}a^{7}+\frac{2}{5}a^{6}+\frac{2}{5}a^{4}+\frac{2}{5}a^{2}-\frac{1}{5}a$, $\frac{1}{5}a^{8}+\frac{1}{5}a^{6}+\frac{2}{5}a^{5}+\frac{1}{5}a^{4}+\frac{2}{5}a^{3}+\frac{2}{5}a$, $\frac{1}{414492635}a^{9}-\frac{26580558}{414492635}a^{8}-\frac{7346259}{82898527}a^{7}+\frac{132602042}{414492635}a^{6}-\frac{17287581}{82898527}a^{5}-\frac{163967618}{414492635}a^{4}-\frac{63821001}{414492635}a^{3}+\frac{20015554}{82898527}a^{2}-\frac{32214086}{82898527}a+\frac{13310823}{82898527}$ 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:  $C_{5}$, which has order $5$
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:  $C_{5}$, which has order $5$
Copy content comment:Narrow class group
 
Copy content sage:K.narrow_class_group().invariants()
 
Copy content gp:bnfnarrow(K)
 
Copy content magma:NarrowClassGroup(K);
 
Relative class number:   $5$

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:  $4$
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:   \( \frac{819337}{414492635} a^{9} + \frac{3175178}{414492635} a^{8} + \frac{6393611}{414492635} a^{7} + \frac{5496161}{82898527} a^{6} + \frac{12919128}{414492635} a^{5} + \frac{90165976}{82898527} a^{4} - \frac{672026439}{414492635} a^{3} + \frac{1740696047}{414492635} a^{2} - \frac{155456098}{414492635} a + \frac{85369285}{82898527} \)  (order $6$) 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:   $\frac{19906401}{414492635}a^{9}-\frac{20389644}{414492635}a^{8}+\frac{249309738}{414492635}a^{7}-\frac{605705058}{414492635}a^{6}+\frac{3159468018}{414492635}a^{5}-\frac{4975999938}{414492635}a^{4}+\frac{7808137777}{414492635}a^{3}-\frac{1160356104}{414492635}a^{2}+\frac{15755634}{82898527}a-\frac{302730833}{82898527}$, $\frac{263492}{414492635}a^{9}+\frac{563586}{414492635}a^{8}+\frac{129022}{82898527}a^{7}+\frac{3481866}{414492635}a^{6}+\frac{10640774}{414492635}a^{5}+\frac{152613061}{414492635}a^{4}-\frac{191196488}{414492635}a^{3}+\frac{99863882}{82898527}a^{2}+\frac{125938414}{414492635}a+\frac{24493600}{82898527}$, $\frac{790239}{414492635}a^{9}+\frac{994952}{414492635}a^{8}+\frac{581382}{82898527}a^{7}+\frac{2303377}{414492635}a^{6}+\frac{41769638}{414492635}a^{5}+\frac{272958432}{414492635}a^{4}-\frac{535544141}{414492635}a^{3}+\frac{281121387}{82898527}a^{2}+\frac{1081372948}{414492635}a+\frac{68959775}{82898527}$, $\frac{43504}{414492635}a^{9}-\frac{9042109}{414492635}a^{8}-\frac{6251228}{414492635}a^{7}-\frac{21272047}{82898527}a^{6}+\frac{131261181}{414492635}a^{5}-\frac{197916900}{82898527}a^{4}+\frac{466029942}{414492635}a^{3}-\frac{1125012811}{414492635}a^{2}-\frac{44194991}{414492635}a-\frac{55065830}{82898527}$ 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:  \( 485.913224212 \)
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

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{5}\cdot 485.913224212 \cdot 5}{6\cdot\sqrt{207252522098163}}\cr\approx \mathstrut & 0.275439931842 \end{aligned}\]

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^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25) 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^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25, 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^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25); 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^10 - x^9 + 13*x^8 - 30*x^7 + 164*x^6 - 255*x^5 + 448*x^4 - 99*x^3 + 106*x^2 - 5*x + 25); 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

$C_{10}$ (as 10T1):

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 10
The 10 conjugacy class representatives for $C_{10}$
Character table for $C_{10}$

Intermediate fields

\(\Q(\sqrt{-3}) \), 5.5.923521.1

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 ${\href{/padicField/2.10.0.1}{10} }$ R ${\href{/padicField/5.2.0.1}{2} }^{5}$ ${\href{/padicField/7.5.0.1}{5} }^{2}$ ${\href{/padicField/11.10.0.1}{10} }$ ${\href{/padicField/13.5.0.1}{5} }^{2}$ ${\href{/padicField/17.10.0.1}{10} }$ ${\href{/padicField/19.5.0.1}{5} }^{2}$ ${\href{/padicField/23.10.0.1}{10} }$ ${\href{/padicField/29.10.0.1}{10} }$ R ${\href{/padicField/37.1.0.1}{1} }^{10}$ ${\href{/padicField/41.10.0.1}{10} }$ ${\href{/padicField/43.5.0.1}{5} }^{2}$ ${\href{/padicField/47.10.0.1}{10} }$ ${\href{/padicField/53.10.0.1}{10} }$ ${\href{/padicField/59.10.0.1}{10} }$

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 3.5.2.5a1.2$x^{10} + 4 x^{6} + 2 x^{5} + 4 x^{2} + 4 x + 4$$2$$5$$5$$C_{10}$$$[\ ]_{2}^{5}$$
\(31\) Copy content Toggle raw display 31.1.5.4a1.1$x^{5} + 31$$5$$1$$4$$C_5$$$[\ ]_{5}$$
31.1.5.4a1.1$x^{5} + 31$$5$$1$$4$$C_5$$$[\ ]_{5}$$

Artin representations

Label Dimension Conductor Artin stem field $G$ Ind $\chi(c)$
*10 1.1.1t1.a.a$1$ $1$ \(\Q\) $C_1$ $1$ $1$
*10 1.3.2t1.a.a$1$ $ 3 $ \(\Q(\sqrt{-3}) \) $C_2$ (as 2T1) $1$ $-1$
*10 1.31.5t1.a.a$1$ $ 31 $ 5.5.923521.1 $C_5$ (as 5T1) $0$ $1$
*10 1.93.10t1.a.a$1$ $ 3 \cdot 31 $ 10.0.207252522098163.1 $C_{10}$ (as 10T1) $0$ $-1$
*10 1.31.5t1.a.b$1$ $ 31 $ 5.5.923521.1 $C_5$ (as 5T1) $0$ $1$
*10 1.93.10t1.a.c$1$ $ 3 \cdot 31 $ 10.0.207252522098163.1 $C_{10}$ (as 10T1) $0$ $-1$
*10 1.31.5t1.a.c$1$ $ 31 $ 5.5.923521.1 $C_5$ (as 5T1) $0$ $1$
*10 1.93.10t1.a.b$1$ $ 3 \cdot 31 $ 10.0.207252522098163.1 $C_{10}$ (as 10T1) $0$ $-1$
*10 1.31.5t1.a.d$1$ $ 31 $ 5.5.923521.1 $C_5$ (as 5T1) $0$ $1$
*10 1.93.10t1.a.d$1$ $ 3 \cdot 31 $ 10.0.207252522098163.1 $C_{10}$ (as 10T1) $0$ $-1$

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)