Properties

Label 17.1.186...536.1
Degree $17$
Signature $[1, 8]$
Discriminant $1.863\times 10^{24}$
Root discriminant \(26.77\)
Ramified primes $2,3$
Class number $1$ (GRH)
Class group trivial (GRH)
Galois group $S_{17}$ (as 17T10)

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Show commands: Magma / Oscar / PariGP / SageMath

Normalized defining polynomial

sage: x = polygen(QQ); K.<a> = NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3)
 
gp: K = bnfinit(y^17 - 7*y^16 + 22*y^15 - 34*y^14 + 16*y^13 + 8*y^12 - 48*y^11 + 12*y^10 - 76*y^8 + 46*y^7 - 34*y^6 - 32*y^5 + 32*y^4 - 20*y^3 + 9*y - 3, 1)
 
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3);
 
oscar: Qx, x = PolynomialRing(QQ); K, a = NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3)
 

\( x^{17} - 7 x^{16} + 22 x^{15} - 34 x^{14} + 16 x^{13} + 8 x^{12} - 48 x^{11} + 12 x^{10} - 76 x^{8} + \cdots - 3 \) Copy content Toggle raw display

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

Invariants

Degree:  $17$
sage: K.degree()
 
gp: poldegree(K.pol)
 
magma: Degree(K);
 
oscar: degree(K)
 
Signature:  $[1, 8]$
sage: K.signature()
 
gp: K.sign
 
magma: Signature(K);
 
oscar: signature(K)
 
Discriminant:   \(1863207356329472909377536\) \(\medspace = 2^{41}\cdot 3^{25}\) Copy content Toggle raw display
sage: K.disc()
 
gp: K.disc
 
magma: OK := Integers(K); Discriminant(OK);
 
oscar: OK = ring_of_integers(K); discriminant(OK)
 
Root discriminant:  \(26.77\)
sage: (K.disc().abs())^(1./K.degree())
 
gp: abs(K.disc)^(1/poldegree(K.pol))
 
magma: Abs(Discriminant(OK))^(1/Degree(K));
 
oscar: (1.0 * dK)^(1/degree(K))
 
Galois root discriminant:  not computed
Ramified primes:   \(2\), \(3\) Copy content Toggle raw display
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
magma: PrimeDivisors(Discriminant(OK));
 
oscar: prime_divisors(discriminant((OK)))
 
Discriminant root field:  \(\Q(\sqrt{6}) \)
$\card{ \Aut(K/\Q) }$:  $1$
sage: K.automorphisms()
 
magma: Automorphisms(K);
 
oscar: automorphisms(K)
 
This field is not Galois over $\Q$.
This is not a CM field.

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $\frac{1}{3}a^{9}+\frac{1}{3}a^{8}-\frac{1}{3}a^{7}+\frac{1}{3}a^{6}-\frac{1}{3}a^{5}+\frac{1}{3}a^{4}+\frac{1}{3}a^{3}$, $\frac{1}{3}a^{10}+\frac{1}{3}a^{8}-\frac{1}{3}a^{7}+\frac{1}{3}a^{6}-\frac{1}{3}a^{5}-\frac{1}{3}a^{3}$, $\frac{1}{3}a^{11}+\frac{1}{3}a^{8}-\frac{1}{3}a^{7}+\frac{1}{3}a^{6}+\frac{1}{3}a^{5}+\frac{1}{3}a^{4}-\frac{1}{3}a^{3}$, $\frac{1}{3}a^{12}+\frac{1}{3}a^{8}-\frac{1}{3}a^{7}-\frac{1}{3}a^{5}+\frac{1}{3}a^{4}-\frac{1}{3}a^{3}$, $\frac{1}{9}a^{13}+\frac{1}{9}a^{11}+\frac{1}{9}a^{10}+\frac{1}{9}a^{9}+\frac{4}{9}a^{8}+\frac{4}{9}a^{7}+\frac{1}{9}a^{6}-\frac{2}{9}a^{5}-\frac{1}{3}a^{4}+\frac{1}{9}a^{3}-\frac{1}{3}a^{2}-\frac{1}{3}a-\frac{1}{3}$, $\frac{1}{9}a^{14}+\frac{1}{9}a^{12}+\frac{1}{9}a^{11}+\frac{1}{9}a^{10}+\frac{1}{9}a^{9}+\frac{1}{9}a^{8}+\frac{4}{9}a^{7}+\frac{4}{9}a^{6}-\frac{2}{9}a^{4}+\frac{1}{3}a^{3}-\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{9}a^{15}+\frac{1}{9}a^{12}-\frac{1}{9}a^{6}-\frac{1}{3}a^{4}-\frac{4}{9}a^{3}+\frac{1}{3}a+\frac{1}{3}$, $\frac{1}{8488134}a^{16}-\frac{106649}{4244067}a^{15}+\frac{1764}{471563}a^{14}+\frac{85970}{4244067}a^{13}-\frac{371570}{4244067}a^{12}-\frac{232907}{1414689}a^{11}+\frac{162694}{1414689}a^{10}+\frac{12476}{83217}a^{9}+\frac{3831}{27739}a^{8}-\frac{1545032}{4244067}a^{7}-\frac{1894081}{4244067}a^{6}-\frac{203957}{471563}a^{5}+\frac{779113}{4244067}a^{4}+\frac{1010333}{4244067}a^{3}-\frac{496954}{1414689}a^{2}+\frac{80763}{471563}a+\frac{109019}{2829378}$ Copy content Toggle raw display

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

Monogenic:  Not computed
Index:  $1$
Inessential primes:  None

Class group and class number

Trivial group, which has order $1$ (assuming GRH)

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

Unit group

sage: UK = K.unit_group()
 
magma: UK, fUK := UnitGroup(K);
 
oscar: UK, fUK = unit_group(OK)
 
Rank:  $8$
sage: UK.rank()
 
gp: K.fu
 
magma: UnitRank(K);
 
oscar: rank(UK)
 
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);
 
oscar: torsion_units_generator(OK)
 
Fundamental units:   $\frac{71965}{1414689}a^{16}+\frac{1373197}{4244067}a^{15}-\frac{1253071}{1414689}a^{14}+\frac{3754001}{4244067}a^{13}+\frac{4103314}{4244067}a^{12}-\frac{10925566}{4244067}a^{11}+\frac{16156070}{4244067}a^{10}+\frac{398755}{249651}a^{9}-\frac{471239}{249651}a^{8}+\frac{34655582}{4244067}a^{7}+\frac{3149704}{4244067}a^{6}+\frac{3320315}{4244067}a^{5}+\frac{13151074}{1414689}a^{4}-\frac{5925392}{4244067}a^{3}+\frac{2097955}{1414689}a^{2}+\frac{4414559}{1414689}a-\frac{1419238}{1414689}$, $\frac{65611}{1414689}a^{16}-\frac{831344}{4244067}a^{15}+\frac{688540}{4244067}a^{14}+\frac{3633577}{4244067}a^{13}-\frac{9308347}{4244067}a^{12}-\frac{3286}{4244067}a^{11}-\frac{1299805}{4244067}a^{10}-\frac{908969}{249651}a^{9}+\frac{45751}{249651}a^{8}-\frac{1780534}{4244067}a^{7}-\frac{14022236}{4244067}a^{6}+\frac{19803958}{4244067}a^{5}+\frac{6666184}{4244067}a^{4}+\frac{269618}{471563}a^{3}+\frac{4391572}{1414689}a^{2}+\frac{251279}{1414689}a-\frac{293538}{471563}$, $\frac{233384}{4244067}a^{16}-\frac{2150152}{4244067}a^{15}+\frac{8284357}{4244067}a^{14}-\frac{16584793}{4244067}a^{13}+\frac{4753342}{1414689}a^{12}+\frac{1326769}{4244067}a^{11}-\frac{15076037}{4244067}a^{10}+\frac{1668410}{249651}a^{9}+\frac{663371}{249651}a^{8}-\frac{297853}{4244067}a^{7}+\frac{63004457}{4244067}a^{6}+\frac{4572089}{1414689}a^{5}+\frac{28640594}{4244067}a^{4}+\frac{48862516}{4244067}a^{3}+\frac{3387532}{1414689}a^{2}+\frac{1780890}{471563}a+\frac{3881135}{1414689}$, $\frac{8268277}{4244067}a^{16}-\frac{18232340}{1414689}a^{15}+\frac{160922171}{4244067}a^{14}-\frac{73037681}{1414689}a^{13}+\frac{45953729}{4244067}a^{12}+\frac{90976063}{4244067}a^{11}-\frac{370799195}{4244067}a^{10}-\frac{2813053}{249651}a^{9}-\frac{620119}{249651}a^{8}-\frac{217432249}{1414689}a^{7}+\frac{117058630}{4244067}a^{6}-\frac{230538256}{4244067}a^{5}-\frac{384470531}{4244067}a^{4}+\frac{109925465}{4244067}a^{3}-\frac{12871860}{471563}a^{2}-\frac{6757260}{471563}a+\frac{16518586}{1414689}$, $\frac{2171021}{4244067}a^{16}+\frac{5044279}{1414689}a^{15}-\frac{46449500}{4244067}a^{14}+\frac{66637939}{4244067}a^{13}-\frac{16125992}{4244067}a^{12}-\frac{38278901}{4244067}a^{11}+\frac{100869673}{4244067}a^{10}-\frac{495019}{249651}a^{9}-\frac{1744423}{249651}a^{8}+\frac{18176687}{471563}a^{7}-\frac{79880873}{4244067}a^{6}+\frac{3034328}{471563}a^{5}+\frac{31501829}{1414689}a^{4}-\frac{6568559}{471563}a^{3}+\frac{2420615}{471563}a^{2}+\frac{1958467}{471563}a-\frac{2789880}{471563}$, $\frac{1221494}{4244067}a^{16}+\frac{774517}{471563}a^{15}-\frac{15797006}{4244067}a^{14}+\frac{6709336}{4244067}a^{13}+\frac{34619653}{4244067}a^{12}-\frac{36811907}{4244067}a^{11}+\frac{49685320}{4244067}a^{10}+\frac{3405950}{249651}a^{9}-\frac{1144714}{249651}a^{8}+\frac{26620780}{1414689}a^{7}+\frac{49543450}{4244067}a^{6}-\frac{14043152}{1414689}a^{5}+\frac{24329734}{1414689}a^{4}-\frac{1615223}{471563}a^{3}-\frac{3444887}{471563}a^{2}+\frac{1748734}{471563}a-\frac{145230}{471563}$, $\frac{6419725}{4244067}a^{16}-\frac{45036521}{4244067}a^{15}+\frac{141340031}{4244067}a^{14}-\frac{217665352}{4244067}a^{13}+\frac{11564326}{471563}a^{12}+\frac{10495216}{1414689}a^{11}-\frac{27981178}{471563}a^{10}+\frac{741334}{83217}a^{9}+\frac{141248}{83217}a^{8}-\frac{449070811}{4244067}a^{7}+\frac{246828731}{4244067}a^{6}-\frac{236262023}{4244067}a^{5}-\frac{175880210}{4244067}a^{4}+\frac{25321577}{1414689}a^{3}-\frac{36193385}{1414689}a^{2}-\frac{6356473}{1414689}a+\frac{2634548}{471563}$, $\frac{44581}{249651}a^{16}+\frac{108938}{249651}a^{15}+\frac{345865}{249651}a^{14}-\frac{2330651}{249651}a^{13}+\frac{1512527}{83217}a^{12}-\frac{236341}{27739}a^{11}+\frac{847531}{83217}a^{10}+\frac{1847818}{83217}a^{9}+\frac{167381}{27739}a^{8}+\frac{4133281}{249651}a^{7}+\frac{9345406}{249651}a^{6}-\frac{3298429}{249651}a^{5}+\frac{6217232}{249651}a^{4}-\frac{154874}{83217}a^{3}-\frac{311272}{83217}a^{2}+\frac{272338}{83217}a-\frac{54848}{27739}$ Copy content Toggle raw display (assuming GRH)
sage: UK.fundamental_units()
 
gp: K.fu
 
magma: [K|fUK(g): g in Generators(UK)];
 
oscar: [K(fUK(a)) for a in gens(UK)]
 
Regulator:  \( 1860535.6396997238 \) (assuming GRH)
sage: K.regulator()
 
gp: K.reg
 
magma: Regulator(K);
 
oscar: regulator(K)
 

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{1}\cdot(2\pi)^{8}\cdot 1860535.6396997238 \cdot 1}{2\cdot\sqrt{1863207356329472909377536}}\cr\approx \mathstrut & 3.31090214631167 \end{aligned}\] (assuming GRH)

# self-contained SageMath code snippet to compute the analytic class number formula
 
x = polygen(QQ); K.<a> = NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3)
 
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))))
 
# self-contained Pari/GP code snippet to compute the analytic class number formula
 
K = bnfinit(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3, 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)))]
 
/* self-contained Magma code snippet to compute the analytic class number formula */
 
Qx<x> := PolynomialRing(QQ); K<a> := NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3);
 
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)));
 
# self-contained Oscar code snippet to compute the analytic class number formula
 
Qx, x = PolynomialRing(QQ); K, a = NumberField(x^17 - 7*x^16 + 22*x^15 - 34*x^14 + 16*x^13 + 8*x^12 - 48*x^11 + 12*x^10 - 76*x^8 + 46*x^7 - 34*x^6 - 32*x^5 + 32*x^4 - 20*x^3 + 9*x - 3);
 
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

$S_{17}$ (as 17T10):

sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
magma: G = GaloisGroup(K);
 
oscar: G, Gtx = galois_group(K); G, transitive_group_identification(G)
 
A non-solvable group of order 355687428096000
The 297 conjugacy class representatives for $S_{17}$
Character table for $S_{17}$

Intermediate fields

The extension is primitive: there are no intermediate fields between this field and $\Q$.
sage: K.subfields()[1:-1]
 
gp: L = nfsubfields(K); L[2..length(b)]
 
magma: L := Subfields(K); L[2..#L];
 
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 R R $17$ $16{,}\,{\href{/padicField/7.1.0.1}{1} }$ ${\href{/padicField/11.7.0.1}{7} }^{2}{,}\,{\href{/padicField/11.2.0.1}{2} }{,}\,{\href{/padicField/11.1.0.1}{1} }$ ${\href{/padicField/13.10.0.1}{10} }{,}\,{\href{/padicField/13.4.0.1}{4} }{,}\,{\href{/padicField/13.2.0.1}{2} }{,}\,{\href{/padicField/13.1.0.1}{1} }$ ${\href{/padicField/17.7.0.1}{7} }{,}\,{\href{/padicField/17.5.0.1}{5} }{,}\,{\href{/padicField/17.2.0.1}{2} }{,}\,{\href{/padicField/17.1.0.1}{1} }^{3}$ ${\href{/padicField/19.7.0.1}{7} }{,}\,{\href{/padicField/19.6.0.1}{6} }{,}\,{\href{/padicField/19.4.0.1}{4} }$ ${\href{/padicField/23.10.0.1}{10} }{,}\,{\href{/padicField/23.5.0.1}{5} }{,}\,{\href{/padicField/23.2.0.1}{2} }$ ${\href{/padicField/29.5.0.1}{5} }^{2}{,}\,{\href{/padicField/29.3.0.1}{3} }^{2}{,}\,{\href{/padicField/29.1.0.1}{1} }$ $16{,}\,{\href{/padicField/31.1.0.1}{1} }$ ${\href{/padicField/37.14.0.1}{14} }{,}\,{\href{/padicField/37.3.0.1}{3} }$ ${\href{/padicField/41.14.0.1}{14} }{,}\,{\href{/padicField/41.3.0.1}{3} }$ $17$ ${\href{/padicField/47.13.0.1}{13} }{,}\,{\href{/padicField/47.3.0.1}{3} }{,}\,{\href{/padicField/47.1.0.1}{1} }$ ${\href{/padicField/53.14.0.1}{14} }{,}\,{\href{/padicField/53.2.0.1}{2} }{,}\,{\href{/padicField/53.1.0.1}{1} }$ ${\href{/padicField/59.13.0.1}{13} }{,}\,{\href{/padicField/59.2.0.1}{2} }{,}\,{\href{/padicField/59.1.0.1}{1} }^{2}$

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

# to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ for $p=7$ in Sage:
 
p = 7; [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
 
\\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ for $p=7$ in Pari:
 
p = 7; pfac = idealprimedec(K, p); vector(length(pfac), j, [pfac[j][3], pfac[j][4]])
 
// to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ for $p=7 in Magma:
 
p := 7; [<pr[2], Valuation(Norm(pr[1]), p)> : pr in Factorization(p*Integers(K))];
 
# to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ 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
\(2\) Copy content Toggle raw display $\Q_{2}$$x + 1$$1$$1$$0$Trivial$[\ ]$
Deg $16$$16$$1$$41$
\(3\) Copy content Toggle raw display 3.2.1.1$x^{2} + 6$$2$$1$$1$$C_2$$[\ ]_{2}$
3.3.3.1$x^{3} + 6 x + 3$$3$$1$$3$$S_3$$[3/2]_{2}$
3.12.21.8$x^{12} + 3 x^{10} + 6 x^{9} + 3 x^{6} + 15 x^{3} + 24$$12$$1$$21$12T118$[2, 9/4, 9/4]_{4}^{2}$