Properties

Label 18.2.402...137.1
Degree $18$
Signature $(2, 8)$
Discriminant $4.025\times 10^{40}$
Root discriminant \(180.23\)
Ramified prime $17$
Class number $1$ (GRH)
Class group trivial (GRH)
Galois group $\PGL(2,17)$ (as 18T468)

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Normalized defining polynomial

Copy content comment:Define the number field
 
Copy content sage:x = polygen(QQ); K.<a> = NumberField(x^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599)
 
Copy content gp:K = bnfinit(y^18 - 7*y^17 + 17*y^16 + 17*y^15 - 935*y^14 + 799*y^13 + 9231*y^12 - 41463*y^11 + 192780*y^10 + 291686*y^9 - 390014*y^8 + 6132223*y^7 - 3955645*y^6 + 2916112*y^5 + 45030739*y^4 - 94452714*y^3 + 184016925*y^2 - 141466230*y + 113422599, 1)
 
Copy content magma:R<x> := PolynomialRing(Rationals()); K<a> := NumberField(x^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599);
 
Copy content oscar:Qx, x = polynomial_ring(QQ); K, a = number_field(x^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599)
 

\( x^{18} - 7 x^{17} + 17 x^{16} + 17 x^{15} - 935 x^{14} + 799 x^{13} + 9231 x^{12} - 41463 x^{11} + \cdots + 113422599 \) 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:  $18$
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:  $(2, 8)$
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:   \(40254497110927943179349807054456171205137\) \(\medspace = 17^{33}\) 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:  \(180.23\)
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:  $17^{543/272}\approx 286.0053344539552$
Ramified primes:   \(17\) 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:  \(\Q(\sqrt{17}) \)
$\Aut(K/\Q)$:   $C_1$
Copy content comment:Automorphisms
 
Copy content sage:K.automorphisms()
 
Copy content magma:Automorphisms(K);
 
Copy content oscar:automorphism_group(K)
 
This field is not Galois over $\Q$.
This is not a CM field.
This field has no CM subfields.

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $\frac{1}{3}a^{5}-\frac{1}{3}a^{4}-\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{3}a^{6}-\frac{1}{3}a^{4}-\frac{1}{3}a^{3}+\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{3}a^{7}+\frac{1}{3}a^{4}+\frac{1}{3}a^{3}+\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{3}a^{8}-\frac{1}{3}a^{4}+\frac{1}{3}a^{3}+\frac{1}{3}a$, $\frac{1}{3}a^{9}-\frac{1}{3}a$, $\frac{1}{9}a^{10}+\frac{1}{9}a^{9}+\frac{1}{9}a^{8}+\frac{1}{9}a^{7}-\frac{1}{9}a^{5}-\frac{2}{9}a^{4}-\frac{4}{9}a^{3}-\frac{2}{9}a^{2}-\frac{1}{3}a$, $\frac{1}{9}a^{11}-\frac{1}{9}a^{7}-\frac{1}{9}a^{6}-\frac{1}{9}a^{5}-\frac{2}{9}a^{4}+\frac{2}{9}a^{3}-\frac{1}{9}a^{2}+\frac{1}{3}a$, $\frac{1}{9}a^{12}-\frac{1}{9}a^{8}-\frac{1}{9}a^{7}-\frac{1}{9}a^{6}+\frac{1}{9}a^{5}-\frac{1}{9}a^{4}-\frac{1}{9}a^{3}-\frac{1}{3}a$, $\frac{1}{27}a^{13}-\frac{1}{27}a^{11}-\frac{1}{27}a^{10}+\frac{1}{27}a^{9}+\frac{1}{27}a^{8}-\frac{1}{27}a^{7}-\frac{1}{27}a^{6}+\frac{4}{27}a^{5}-\frac{1}{3}a^{4}-\frac{1}{27}a^{3}+\frac{4}{9}a^{2}+\frac{1}{3}a$, $\frac{1}{27}a^{14}-\frac{1}{27}a^{12}-\frac{1}{27}a^{11}+\frac{1}{27}a^{10}+\frac{1}{27}a^{9}-\frac{1}{27}a^{8}-\frac{1}{27}a^{7}+\frac{4}{27}a^{6}-\frac{10}{27}a^{4}+\frac{4}{9}a^{3}-\frac{1}{3}a$, $\frac{1}{27}a^{15}-\frac{1}{27}a^{12}+\frac{1}{9}a^{7}-\frac{1}{27}a^{6}+\frac{1}{9}a^{5}-\frac{2}{9}a^{4}-\frac{1}{27}a^{3}-\frac{2}{9}a^{2}$, $\frac{1}{27}a^{16}-\frac{1}{27}a^{11}-\frac{1}{27}a^{10}+\frac{1}{27}a^{9}+\frac{4}{27}a^{8}-\frac{2}{27}a^{7}+\frac{2}{27}a^{6}-\frac{2}{27}a^{5}-\frac{10}{27}a^{4}-\frac{7}{27}a^{3}+\frac{4}{9}a^{2}+\frac{1}{3}a$, $\frac{1}{70\cdots 37}a^{17}+\frac{33\cdots 81}{70\cdots 37}a^{16}+\frac{11\cdots 11}{70\cdots 37}a^{15}+\frac{63\cdots 48}{70\cdots 37}a^{14}-\frac{74\cdots 10}{70\cdots 37}a^{13}+\frac{26\cdots 00}{70\cdots 37}a^{12}+\frac{10\cdots 69}{87\cdots 77}a^{11}-\frac{12\cdots 35}{78\cdots 93}a^{10}+\frac{53\cdots 04}{78\cdots 93}a^{9}+\frac{48\cdots 93}{70\cdots 37}a^{8}+\frac{57\cdots 46}{70\cdots 37}a^{7}+\frac{18\cdots 23}{70\cdots 37}a^{6}+\frac{60\cdots 55}{70\cdots 37}a^{5}-\frac{34\cdots 51}{70\cdots 37}a^{4}-\frac{50\cdots 74}{70\cdots 37}a^{3}-\frac{39\cdots 75}{23\cdots 79}a^{2}+\frac{53\cdots 13}{26\cdots 31}a+\frac{18\cdots 57}{26\cdots 31}$ 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:  No
Index:  Not computed
Inessential primes:  $3$

Class group and class number

Ideal class group:  Trivial group, which has order $1$ (assuming GRH)
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:  Trivial group, which has order $1$ (assuming GRH)
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:  $9$
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:   $\frac{28\cdots 65}{70\cdots 37}a^{17}-\frac{30\cdots 07}{70\cdots 37}a^{16}+\frac{16\cdots 38}{70\cdots 37}a^{15}+\frac{21\cdots 13}{70\cdots 37}a^{14}-\frac{26\cdots 58}{70\cdots 37}a^{13}+\frac{17\cdots 96}{70\cdots 37}a^{12}+\frac{20\cdots 86}{78\cdots 93}a^{11}-\frac{44\cdots 28}{87\cdots 77}a^{10}+\frac{80\cdots 56}{78\cdots 93}a^{9}-\frac{25\cdots 88}{70\cdots 37}a^{8}-\frac{13\cdots 23}{70\cdots 37}a^{7}+\frac{12\cdots 13}{70\cdots 37}a^{6}-\frac{10\cdots 12}{70\cdots 37}a^{5}-\frac{56\cdots 68}{70\cdots 37}a^{4}+\frac{24\cdots 19}{70\cdots 37}a^{3}-\frac{31\cdots 89}{23\cdots 79}a^{2}+\frac{43\cdots 28}{26\cdots 31}a-\frac{40\cdots 57}{26\cdots 31}$, $\frac{14\cdots 08}{70\cdots 37}a^{17}-\frac{94\cdots 00}{70\cdots 37}a^{16}-\frac{26\cdots 52}{70\cdots 37}a^{15}+\frac{61\cdots 63}{70\cdots 37}a^{14}-\frac{51\cdots 15}{70\cdots 37}a^{13}+\frac{18\cdots 11}{70\cdots 37}a^{12}-\frac{23\cdots 48}{87\cdots 77}a^{11}-\frac{26\cdots 90}{26\cdots 31}a^{10}+\frac{64\cdots 56}{78\cdots 93}a^{9}-\frac{16\cdots 70}{70\cdots 37}a^{8}+\frac{25\cdots 70}{70\cdots 37}a^{7}+\frac{18\cdots 36}{70\cdots 37}a^{6}-\frac{16\cdots 83}{70\cdots 37}a^{5}+\frac{48\cdots 61}{70\cdots 37}a^{4}-\frac{80\cdots 68}{70\cdots 37}a^{3}+\frac{32\cdots 68}{23\cdots 79}a^{2}-\frac{26\cdots 36}{26\cdots 31}a+\frac{13\cdots 15}{26\cdots 31}$, $\frac{52\cdots 62}{70\cdots 37}a^{17}-\frac{23\cdots 05}{70\cdots 37}a^{16}+\frac{87\cdots 01}{70\cdots 37}a^{15}+\frac{14\cdots 78}{70\cdots 37}a^{14}-\frac{14\cdots 89}{70\cdots 37}a^{13}+\frac{14\cdots 58}{70\cdots 37}a^{12}+\frac{48\cdots 71}{78\cdots 93}a^{11}-\frac{29\cdots 58}{78\cdots 93}a^{10}-\frac{23\cdots 53}{78\cdots 93}a^{9}-\frac{15\cdots 02}{70\cdots 37}a^{8}-\frac{84\cdots 17}{70\cdots 37}a^{7}+\frac{61\cdots 47}{70\cdots 37}a^{6}-\frac{21\cdots 33}{70\cdots 37}a^{5}-\frac{39\cdots 30}{70\cdots 37}a^{4}+\frac{10\cdots 26}{70\cdots 37}a^{3}-\frac{93\cdots 80}{23\cdots 79}a^{2}+\frac{82\cdots 66}{26\cdots 31}a-\frac{78\cdots 76}{26\cdots 31}$, $\frac{14\cdots 68}{23\cdots 79}a^{17}-\frac{48\cdots 94}{23\cdots 79}a^{16}-\frac{76\cdots 26}{23\cdots 79}a^{15}+\frac{64\cdots 81}{23\cdots 79}a^{14}-\frac{10\cdots 42}{23\cdots 79}a^{13}-\frac{37\cdots 98}{23\cdots 79}a^{12}+\frac{39\cdots 64}{78\cdots 93}a^{11}+\frac{26\cdots 80}{78\cdots 93}a^{10}+\frac{39\cdots 83}{78\cdots 93}a^{9}+\frac{99\cdots 25}{23\cdots 79}a^{8}+\frac{23\cdots 35}{23\cdots 79}a^{7}+\frac{77\cdots 79}{23\cdots 79}a^{6}+\frac{13\cdots 18}{23\cdots 79}a^{5}+\frac{16\cdots 44}{23\cdots 79}a^{4}+\frac{37\cdots 67}{23\cdots 79}a^{3}-\frac{24\cdots 29}{78\cdots 93}a^{2}+\frac{56\cdots 03}{29\cdots 59}a-\frac{38\cdots 22}{87\cdots 77}$, $\frac{16\cdots 84}{70\cdots 37}a^{17}-\frac{10\cdots 01}{70\cdots 37}a^{16}+\frac{19\cdots 39}{70\cdots 37}a^{15}+\frac{49\cdots 15}{70\cdots 37}a^{14}-\frac{15\cdots 48}{70\cdots 37}a^{13}+\frac{43\cdots 47}{70\cdots 37}a^{12}+\frac{21\cdots 02}{87\cdots 77}a^{11}-\frac{61\cdots 60}{78\cdots 93}a^{10}+\frac{29\cdots 97}{78\cdots 93}a^{9}+\frac{65\cdots 20}{70\cdots 37}a^{8}-\frac{60\cdots 94}{70\cdots 37}a^{7}+\frac{81\cdots 88}{70\cdots 37}a^{6}-\frac{41\cdots 46}{70\cdots 37}a^{5}-\frac{12\cdots 74}{70\cdots 37}a^{4}+\frac{44\cdots 99}{70\cdots 37}a^{3}-\frac{51\cdots 20}{23\cdots 79}a^{2}+\frac{42\cdots 67}{26\cdots 31}a-\frac{51\cdots 32}{26\cdots 31}$, $\frac{13\cdots 79}{23\cdots 79}a^{17}-\frac{75\cdots 09}{23\cdots 79}a^{16}+\frac{63\cdots 24}{23\cdots 79}a^{15}+\frac{71\cdots 23}{23\cdots 79}a^{14}-\frac{12\cdots 61}{23\cdots 79}a^{13}-\frac{86\cdots 10}{23\cdots 79}a^{12}+\frac{21\cdots 91}{29\cdots 59}a^{11}-\frac{11\cdots 30}{78\cdots 93}a^{10}+\frac{15\cdots 41}{26\cdots 31}a^{9}+\frac{79\cdots 60}{23\cdots 79}a^{8}-\frac{25\cdots 56}{23\cdots 79}a^{7}+\frac{49\cdots 24}{23\cdots 79}a^{6}+\frac{51\cdots 99}{23\cdots 79}a^{5}-\frac{14\cdots 82}{23\cdots 79}a^{4}+\frac{38\cdots 94}{23\cdots 79}a^{3}-\frac{12\cdots 56}{78\cdots 93}a^{2}+\frac{23\cdots 30}{29\cdots 59}a+\frac{14\cdots 06}{87\cdots 77}$, $\frac{17\cdots 87}{23\cdots 79}a^{17}-\frac{18\cdots 11}{23\cdots 79}a^{16}+\frac{97\cdots 02}{23\cdots 79}a^{15}-\frac{31\cdots 91}{23\cdots 79}a^{14}-\frac{58\cdots 71}{23\cdots 79}a^{13}+\frac{40\cdots 72}{23\cdots 79}a^{12}+\frac{11\cdots 58}{29\cdots 59}a^{11}-\frac{83\cdots 36}{26\cdots 31}a^{10}+\frac{69\cdots 17}{26\cdots 31}a^{9}-\frac{17\cdots 07}{23\cdots 79}a^{8}+\frac{52\cdots 75}{23\cdots 79}a^{7}-\frac{57\cdots 22}{23\cdots 79}a^{6}+\frac{37\cdots 66}{23\cdots 79}a^{5}+\frac{18\cdots 31}{23\cdots 79}a^{4}-\frac{43\cdots 10}{23\cdots 79}a^{3}+\frac{26\cdots 71}{78\cdots 93}a^{2}-\frac{22\cdots 59}{87\cdots 77}a+\frac{16\cdots 65}{87\cdots 77}$, $\frac{17\cdots 62}{70\cdots 37}a^{17}-\frac{19\cdots 36}{70\cdots 37}a^{16}+\frac{71\cdots 14}{70\cdots 37}a^{15}+\frac{40\cdots 65}{70\cdots 37}a^{14}-\frac{22\cdots 44}{70\cdots 37}a^{13}+\frac{82\cdots 25}{70\cdots 37}a^{12}+\frac{28\cdots 47}{78\cdots 93}a^{11}-\frac{22\cdots 54}{78\cdots 93}a^{10}+\frac{17\cdots 52}{26\cdots 31}a^{9}+\frac{47\cdots 46}{70\cdots 37}a^{8}-\frac{63\cdots 90}{70\cdots 37}a^{7}+\frac{10\cdots 84}{70\cdots 37}a^{6}-\frac{84\cdots 30}{70\cdots 37}a^{5}-\frac{42\cdots 57}{70\cdots 37}a^{4}+\frac{12\cdots 12}{70\cdots 37}a^{3}-\frac{70\cdots 28}{23\cdots 79}a^{2}+\frac{65\cdots 89}{26\cdots 31}a-\frac{43\cdots 26}{26\cdots 31}$, $\frac{39\cdots 01}{70\cdots 37}a^{17}-\frac{14\cdots 09}{70\cdots 37}a^{16}+\frac{28\cdots 88}{70\cdots 37}a^{15}+\frac{22\cdots 83}{70\cdots 37}a^{14}-\frac{31\cdots 64}{70\cdots 37}a^{13}-\frac{67\cdots 28}{70\cdots 37}a^{12}+\frac{15\cdots 35}{78\cdots 93}a^{11}-\frac{22\cdots 56}{78\cdots 93}a^{10}-\frac{17\cdots 47}{78\cdots 93}a^{9}+\frac{45\cdots 73}{70\cdots 37}a^{8}-\frac{41\cdots 41}{70\cdots 37}a^{7}+\frac{31\cdots 34}{70\cdots 37}a^{6}+\frac{93\cdots 50}{70\cdots 37}a^{5}-\frac{30\cdots 90}{70\cdots 37}a^{4}+\frac{60\cdots 77}{70\cdots 37}a^{3}-\frac{33\cdots 17}{23\cdots 79}a^{2}+\frac{27\cdots 78}{26\cdots 31}a-\frac{19\cdots 36}{26\cdots 31}$ Copy content Toggle raw display (assuming GRH)
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:  \( 45413380405400 \) (assuming GRH)
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:  \( 2 \) (assuming GRH)

Class number formula

\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{2}\cdot(2\pi)^{8}\cdot 45413380405400 \cdot 1}{2\cdot\sqrt{40254497110927943179349807054456171205137}}\cr\approx \mathstrut & 1.09962744387092 \end{aligned}\] (assuming GRH)

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^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599) 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^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599, 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^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599); 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^18 - 7*x^17 + 17*x^16 + 17*x^15 - 935*x^14 + 799*x^13 + 9231*x^12 - 41463*x^11 + 192780*x^10 + 291686*x^9 - 390014*x^8 + 6132223*x^7 - 3955645*x^6 + 2916112*x^5 + 45030739*x^4 - 94452714*x^3 + 184016925*x^2 - 141466230*x + 113422599); 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

$\PGL(2,17)$ (as 18T468):

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 non-solvable group of order 4896
The 19 conjugacy class representatives for $\PGL(2,17)$
Character table for $\PGL(2,17)$

Intermediate fields

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

Sibling fields

Degree 36 sibling: data not computed
Minimal sibling: This field is its own minimal sibling

Frobenius cycle types

$p$ $2$ $3$ $5$ $7$ $11$ $13$ $17$ $19$ $23$ $29$ $31$ $37$ $41$ $43$ $47$ $53$ $59$
Cycle type ${\href{/padicField/2.9.0.1}{9} }^{2}$ ${\href{/padicField/3.2.0.1}{2} }^{9}$ $16{,}\,{\href{/padicField/5.1.0.1}{1} }^{2}$ $18$ ${\href{/padicField/11.2.0.1}{2} }^{9}$ ${\href{/padicField/13.9.0.1}{9} }^{2}$ R ${\href{/padicField/19.8.0.1}{8} }^{2}{,}\,{\href{/padicField/19.1.0.1}{1} }^{2}$ $16{,}\,{\href{/padicField/23.1.0.1}{1} }^{2}$ ${\href{/padicField/29.6.0.1}{6} }^{3}$ $18$ $16{,}\,{\href{/padicField/37.1.0.1}{1} }^{2}$ $16{,}\,{\href{/padicField/41.1.0.1}{1} }^{2}$ ${\href{/padicField/43.9.0.1}{9} }^{2}$ ${\href{/padicField/47.2.0.1}{2} }^{8}{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ ${\href{/padicField/53.3.0.1}{3} }^{6}$ ${\href{/padicField/59.3.0.1}{3} }^{6}$

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
\(17\) Copy content Toggle raw display $\Q_{17}$$x + 14$$1$$1$$0$Trivial$$[\ ]$$
17.1.17.33a1.11$x^{17} + 2890 x + 17$$17$$1$$33$$F_{17}$$$[\frac{33}{16}]_{16}$$

Spectrum of ring of integers

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

Additional information

This field is associated with the 17-division points on any elliptic curve in the isogeny class 17.a1.