Normalized defining polynomial
\( x^{8} - x^{7} + 9x^{6} - 105x^{5} + 954x^{4} - 3767x^{3} + 9149x^{2} - 12828x + 7607 \)
Invariants
Degree: | $8$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
| |
Signature: | $[0, 4]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
| |
Discriminant: | \(905824306333433\) \(\medspace = 137^{7}\) | sage: K.disc()
gp: K.disc
magma: OK := Integers(K); Discriminant(OK);
oscar: OK = ring_of_integers(K); discriminant(OK)
| |
Root discriminant: | \(74.07\) | 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: | $137^{7/8}\approx 74.06797925533668$ | ||
Ramified primes: | \(137\) | sage: K.disc().support()
gp: factor(abs(K.disc))[,1]~
magma: PrimeDivisors(Discriminant(OK));
oscar: prime_divisors(discriminant((OK)))
| |
Discriminant root field: | \(\Q(\sqrt{137}) \) | ||
$\card{ \Gal(K/\Q) }$: | $8$ | sage: K.automorphisms()
magma: Automorphisms(K);
oscar: automorphisms(K)
| |
This field is Galois and abelian over $\Q$. | |||
Conductor: | \(137\) | ||
Dirichlet character group: | $\lbrace$$\chi_{137}(96,·)$, $\chi_{137}(1,·)$, $\chi_{137}(100,·)$, $\chi_{137}(37,·)$, $\chi_{137}(136,·)$, $\chi_{137}(41,·)$, $\chi_{137}(10,·)$, $\chi_{137}(127,·)$$\rbrace$ | ||
This is a CM field. | |||
Reflex fields: | 8.0.905824306333433.1$^{8}$ |
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $\frac{1}{4}a^{6}-\frac{1}{4}a^{3}+\frac{1}{4}a^{2}-\frac{1}{4}a-\frac{1}{4}$, $\frac{1}{2561927876}a^{7}+\frac{229716443}{2561927876}a^{6}-\frac{316163756}{640481969}a^{5}+\frac{747824615}{2561927876}a^{4}-\frac{209510575}{1280963938}a^{3}-\frac{416667087}{1280963938}a^{2}-\frac{71991602}{640481969}a-\frac{1204583371}{2561927876}$
Monogenic: | Not computed | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
$C_{17}$, which has order $17$
Unit group
Rank: | $3$ | 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: | $\frac{985293}{640481969}a^{7}+\frac{1693796}{640481969}a^{6}+\frac{6681561}{640481969}a^{5}-\frac{110799630}{640481969}a^{4}+\frac{554644233}{640481969}a^{3}-\frac{1579949959}{640481969}a^{2}+\frac{2226229456}{640481969}a-\frac{1955284245}{640481969}$, $\frac{101243}{640481969}a^{7}+\frac{580321}{640481969}a^{6}+\frac{864020}{640481969}a^{5}-\frac{6541014}{640481969}a^{4}+\frac{5409234}{640481969}a^{3}+\frac{157034150}{640481969}a^{2}-\frac{484298233}{640481969}a+\frac{458933044}{640481969}$, $\frac{3158488}{640481969}a^{7}+\frac{80157883}{640481969}a^{6}+\frac{106323238}{640481969}a^{5}+\frac{48025160}{640481969}a^{4}-\frac{5671594422}{640481969}a^{3}+\frac{48070751519}{640481969}a^{2}-\frac{115534360128}{640481969}a+\frac{87709479064}{640481969}$ | 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: | \( 389.592482406 \) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{4}\cdot 389.592482406 \cdot 17}{2\cdot\sqrt{905824306333433}}\cr\approx \mathstrut & 0.171485333436 \end{aligned}\]
Galois group
A cyclic group of order 8 |
The 8 conjugacy class representatives for $C_8$ |
Character table for $C_8$ |
Intermediate fields
\(\Q(\sqrt{137}) \), 4.4.2571353.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Frobenius cycle types
$p$ | $2$ | $3$ | $5$ | $7$ | $11$ | $13$ | $17$ | $19$ | $23$ | $29$ | $31$ | $37$ | $41$ | $43$ | $47$ | $53$ | $59$ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cycle type | ${\href{/padicField/2.4.0.1}{4} }^{2}$ | ${\href{/padicField/3.8.0.1}{8} }$ | ${\href{/padicField/5.8.0.1}{8} }$ | ${\href{/padicField/7.4.0.1}{4} }^{2}$ | ${\href{/padicField/11.4.0.1}{4} }^{2}$ | ${\href{/padicField/13.8.0.1}{8} }$ | ${\href{/padicField/17.4.0.1}{4} }^{2}$ | ${\href{/padicField/19.4.0.1}{4} }^{2}$ | ${\href{/padicField/23.8.0.1}{8} }$ | ${\href{/padicField/29.8.0.1}{8} }$ | ${\href{/padicField/31.8.0.1}{8} }$ | ${\href{/padicField/37.4.0.1}{4} }^{2}$ | ${\href{/padicField/41.8.0.1}{8} }$ | ${\href{/padicField/43.8.0.1}{8} }$ | ${\href{/padicField/47.8.0.1}{8} }$ | ${\href{/padicField/53.8.0.1}{8} }$ | ${\href{/padicField/59.1.0.1}{1} }^{8}$ |
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 |
---|---|---|---|---|---|---|---|
\(137\) | 137.8.7.3 | $x^{8} + 137$ | $8$ | $1$ | $7$ | $C_8$ | $[\ ]_{8}$ |
Artin representations
Label | Dimension | Conductor | Artin stem field | $G$ | Ind | $\chi(c)$ | |
---|---|---|---|---|---|---|---|
* | 1.1.1t1.a.a | $1$ | $1$ | \(\Q\) | $C_1$ | $1$ | $1$ |
* | 1.137.8t1.a.a | $1$ | $ 137 $ | 8.0.905824306333433.1 | $C_8$ (as 8T1) | $0$ | $-1$ |
* | 1.137.4t1.a.a | $1$ | $ 137 $ | 4.4.2571353.1 | $C_4$ (as 4T1) | $0$ | $1$ |
* | 1.137.8t1.a.b | $1$ | $ 137 $ | 8.0.905824306333433.1 | $C_8$ (as 8T1) | $0$ | $-1$ |
* | 1.137.2t1.a.a | $1$ | $ 137 $ | \(\Q(\sqrt{137}) \) | $C_2$ (as 2T1) | $1$ | $1$ |
* | 1.137.8t1.a.c | $1$ | $ 137 $ | 8.0.905824306333433.1 | $C_8$ (as 8T1) | $0$ | $-1$ |
* | 1.137.4t1.a.b | $1$ | $ 137 $ | 4.4.2571353.1 | $C_4$ (as 4T1) | $0$ | $1$ |
* | 1.137.8t1.a.d | $1$ | $ 137 $ | 8.0.905824306333433.1 | $C_8$ (as 8T1) | $0$ | $-1$ |