Normalized defining polynomial
\( x^{9} - 4x^{8} + 11x^{7} - 23x^{6} + 38x^{5} - 50x^{4} + 46x^{3} - 28x^{2} + 9x - 1 \)
Invariants
Degree: | $9$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
| |
Signature: | $[3, 3]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
| |
Discriminant: | \(-806954491\) \(\medspace = -\,7^{6}\cdot 19^{3}\) | sage: K.disc()
gp: K.disc
magma: OK := Integers(K); Discriminant(OK);
oscar: OK = ring_of_integers(K); discriminant(OK)
| |
Root discriminant: | \(9.76\) | 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: | $7^{2/3}19^{1/2}\approx 15.950543793511486$ | ||
Ramified primes: | \(7\), \(19\) | sage: K.disc().support()
gp: factor(abs(K.disc))[,1]~
magma: PrimeDivisors(Discriminant(OK));
oscar: prime_divisors(discriminant((OK)))
| |
Discriminant root field: | \(\Q(\sqrt{-19}) \) | ||
$\card{ \Aut(K/\Q) }$: | $3$ | 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 \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $\frac{1}{13}a^{8}-\frac{1}{13}a^{7}-\frac{5}{13}a^{6}+\frac{1}{13}a^{5}+\frac{2}{13}a^{4}-\frac{5}{13}a^{3}+\frac{5}{13}a^{2}-\frac{4}{13}$
Monogenic: | Not computed | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
Trivial group, which has order $1$
Unit group
Rank: | $5$ | sage: UK.rank()
gp: K.fu
magma: UnitRank(K);
oscar: rank(UK)
| |
Torsion generator: | \( -1 \) (order $2$) | 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: | $\frac{4}{13}a^{8}-\frac{4}{13}a^{7}+\frac{6}{13}a^{6}+\frac{4}{13}a^{5}-\frac{31}{13}a^{4}+\frac{71}{13}a^{3}-\frac{123}{13}a^{2}+7a-\frac{29}{13}$, $\frac{25}{13}a^{8}-\frac{90}{13}a^{7}+\frac{239}{13}a^{6}-\frac{482}{13}a^{5}+\frac{765}{13}a^{4}-\frac{957}{13}a^{3}+\frac{788}{13}a^{2}-32a+\frac{82}{13}$, $\frac{7}{13}a^{8}-\frac{20}{13}a^{7}+\frac{56}{13}a^{6}-\frac{110}{13}a^{5}+\frac{170}{13}a^{4}-\frac{217}{13}a^{3}+\frac{178}{13}a^{2}-9a+\frac{24}{13}$, $\frac{37}{13}a^{8}-\frac{128}{13}a^{7}+\frac{335}{13}a^{6}-\frac{665}{13}a^{5}+\frac{1036}{13}a^{4}-\frac{1277}{13}a^{3}+\frac{1004}{13}a^{2}-38a+\frac{99}{13}$, $\frac{21}{13}a^{8}-\frac{73}{13}a^{7}+\frac{194}{13}a^{6}-\frac{382}{13}a^{5}+\frac{601}{13}a^{4}-\frac{742}{13}a^{3}+\frac{586}{13}a^{2}-22a+\frac{33}{13}$ | 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: | \( 6.81560012727 \) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{3}\cdot(2\pi)^{3}\cdot 6.81560012727 \cdot 1}{2\cdot\sqrt{806954491}}\cr\approx \mathstrut & 0.238056024838 \end{aligned}\]
Galois group
$C_3\times S_3$ (as 9T4):
A solvable group of order 18 |
The 9 conjugacy class representatives for $S_3\times C_3$ |
Character table for $S_3\times C_3$ |
Intermediate fields
\(\Q(\zeta_{7})^+\), 3.1.931.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
Galois closure: | data not computed |
Degree 6 sibling: | 6.0.336091.1 |
Minimal sibling: | 6.0.336091.1 |
Frobenius cycle types
$p$ | $2$ | $3$ | $5$ | $7$ | $11$ | $13$ | $17$ | $19$ | $23$ | $29$ | $31$ | $37$ | $41$ | $43$ | $47$ | $53$ | $59$ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cycle type | ${\href{/padicField/2.6.0.1}{6} }{,}\,{\href{/padicField/2.3.0.1}{3} }$ | ${\href{/padicField/3.6.0.1}{6} }{,}\,{\href{/padicField/3.3.0.1}{3} }$ | ${\href{/padicField/5.3.0.1}{3} }^{3}$ | R | ${\href{/padicField/11.3.0.1}{3} }^{3}$ | ${\href{/padicField/13.2.0.1}{2} }^{3}{,}\,{\href{/padicField/13.1.0.1}{1} }^{3}$ | ${\href{/padicField/17.3.0.1}{3} }^{3}$ | R | ${\href{/padicField/23.3.0.1}{3} }^{3}$ | ${\href{/padicField/29.2.0.1}{2} }^{3}{,}\,{\href{/padicField/29.1.0.1}{1} }^{3}$ | ${\href{/padicField/31.6.0.1}{6} }{,}\,{\href{/padicField/31.3.0.1}{3} }$ | ${\href{/padicField/37.6.0.1}{6} }{,}\,{\href{/padicField/37.3.0.1}{3} }$ | ${\href{/padicField/41.2.0.1}{2} }^{3}{,}\,{\href{/padicField/41.1.0.1}{1} }^{3}$ | ${\href{/padicField/43.3.0.1}{3} }^{3}$ | ${\href{/padicField/47.3.0.1}{3} }^{3}$ | ${\href{/padicField/53.6.0.1}{6} }{,}\,{\href{/padicField/53.3.0.1}{3} }$ | ${\href{/padicField/59.6.0.1}{6} }{,}\,{\href{/padicField/59.3.0.1}{3} }$ |
In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.
Local algebras for ramified primes
$p$ | Label | Polynomial | $e$ | $f$ | $c$ | Galois group | Slope content |
---|---|---|---|---|---|---|---|
\(7\) | 7.9.6.1 | $x^{9} + 18 x^{8} + 108 x^{7} + 249 x^{6} + 396 x^{5} + 1944 x^{4} + 2631 x^{3} - 2358 x^{2} - 756 x + 11915$ | $3$ | $3$ | $6$ | $C_3^2$ | $[\ ]_{3}^{3}$ |
\(19\) | 19.3.0.1 | $x^{3} + 4 x + 17$ | $1$ | $3$ | $0$ | $C_3$ | $[\ ]^{3}$ |
19.6.3.2 | $x^{6} + 65 x^{4} + 34 x^{3} + 1099 x^{2} - 1802 x + 4564$ | $2$ | $3$ | $3$ | $C_6$ | $[\ ]_{2}^{3}$ |
Artin representations
Label | Dimension | Conductor | Artin stem field | $G$ | Ind | $\chi(c)$ | |
---|---|---|---|---|---|---|---|
* | 1.1.1t1.a.a | $1$ | $1$ | \(\Q\) | $C_1$ | $1$ | $1$ |
1.19.2t1.a.a | $1$ | $ 19 $ | \(\Q(\sqrt{-19}) \) | $C_2$ (as 2T1) | $1$ | $-1$ | |
* | 1.7.3t1.a.a | $1$ | $ 7 $ | \(\Q(\zeta_{7})^+\) | $C_3$ (as 3T1) | $0$ | $1$ |
1.133.6t1.i.a | $1$ | $ 7 \cdot 19 $ | 6.0.16468459.1 | $C_6$ (as 6T1) | $0$ | $-1$ | |
1.133.6t1.i.b | $1$ | $ 7 \cdot 19 $ | 6.0.16468459.1 | $C_6$ (as 6T1) | $0$ | $-1$ | |
* | 1.7.3t1.a.b | $1$ | $ 7 $ | \(\Q(\zeta_{7})^+\) | $C_3$ (as 3T1) | $0$ | $1$ |
* | 2.931.3t2.b.a | $2$ | $ 7^{2} \cdot 19 $ | 3.1.931.1 | $S_3$ (as 3T2) | $1$ | $0$ |
* | 2.133.6t5.b.a | $2$ | $ 7 \cdot 19 $ | 9.3.806954491.1 | $S_3\times C_3$ (as 9T4) | $0$ | $0$ |
* | 2.133.6t5.b.b | $2$ | $ 7 \cdot 19 $ | 9.3.806954491.1 | $S_3\times C_3$ (as 9T4) | $0$ | $0$ |