Normalized defining polynomial
\( x^{8} - 6x^{4} + 4x^{2} - 3 \)
Invariants
| Degree: | $8$ |
| |
| Signature: | $(2, 3)$ |
| |
| Discriminant: |
\(-181398528\)
\(\medspace = -\,2^{10}\cdot 3^{11}\)
|
| |
| Root discriminant: | \(10.77\) |
| |
| Galois root discriminant: | $2^{4/3}3^{11/6}\approx 18.88407114158967$ | ||
| Ramified primes: |
\(2\), \(3\)
|
| |
| Discriminant root field: | \(\Q(\sqrt{-3}) \) | ||
| $\Aut(K/\Q)$: | $C_2$ |
| |
| 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 \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $\frac{1}{2}a^{4}-\frac{1}{2}$, $\frac{1}{4}a^{5}-\frac{1}{4}a^{4}-\frac{1}{2}a^{3}-\frac{1}{4}a-\frac{1}{4}$, $\frac{1}{4}a^{6}-\frac{1}{4}a^{4}-\frac{1}{2}a^{3}-\frac{1}{4}a^{2}-\frac{1}{2}a+\frac{1}{4}$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{4}+\frac{1}{4}a^{3}-\frac{1}{2}a^{2}+\frac{1}{4}$
| Monogenic: | Not computed | |
| Index: | $1$ | |
| Inessential primes: | None |
Class group and class number
| Ideal class group: | Trivial group, which has order $1$ |
| |
| Narrow class group: | Trivial group, which has order $1$ |
|
Unit group
| Rank: | $4$ |
| |
| Torsion generator: |
\( -1 \)
(order $2$)
|
| |
| Fundamental units: |
$\frac{1}{4}a^{7}+\frac{1}{4}a^{4}-\frac{7}{4}a^{3}+\frac{1}{2}a^{2}+a-\frac{5}{4}$, $\frac{1}{4}a^{7}+\frac{1}{4}a^{5}-\frac{5}{4}a^{3}-\frac{1}{2}a^{2}-\frac{1}{4}a-\frac{1}{2}$, $\frac{1}{4}a^{5}+\frac{1}{4}a^{4}+\frac{1}{2}a^{3}-\frac{1}{4}a+\frac{1}{4}$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{4}-\frac{7}{4}a^{3}+\frac{1}{2}a^{2}+a+\frac{1}{4}$
|
| |
| Regulator: | \( 16.6622023168 \) |
| |
| Unit signature rank: | \( 2 \) |
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{2}\cdot(2\pi)^{3}\cdot 16.6622023168 \cdot 1}{2\cdot\sqrt{181398528}}\cr\approx \mathstrut & 0.613740983510 \end{aligned}\]
Galois group
$\GL(2,3)$ (as 8T23):
| A solvable group of order 48 |
| The 8 conjugacy class representatives for $\textrm{GL(2,3)}$ |
| Character table for $\textrm{GL(2,3)}$ |
Intermediate fields
| 4.2.3888.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
| Degree 16 sibling: | deg 16 |
| Degree 24 sibling: | deg 24 |
| Arithmetically equivalent sibling: | 8.2.181398528.2 |
| 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 | R | R | ${\href{/padicField/5.8.0.1}{8} }$ | ${\href{/padicField/7.4.0.1}{4} }^{2}$ | ${\href{/padicField/11.8.0.1}{8} }$ | ${\href{/padicField/13.6.0.1}{6} }{,}\,{\href{/padicField/13.2.0.1}{2} }$ | ${\href{/padicField/17.8.0.1}{8} }$ | ${\href{/padicField/19.3.0.1}{3} }^{2}{,}\,{\href{/padicField/19.1.0.1}{1} }^{2}$ | ${\href{/padicField/23.8.0.1}{8} }$ | ${\href{/padicField/29.2.0.1}{2} }^{3}{,}\,{\href{/padicField/29.1.0.1}{1} }^{2}$ | ${\href{/padicField/31.3.0.1}{3} }^{2}{,}\,{\href{/padicField/31.1.0.1}{1} }^{2}$ | ${\href{/padicField/37.4.0.1}{4} }^{2}$ | ${\href{/padicField/41.2.0.1}{2} }^{3}{,}\,{\href{/padicField/41.1.0.1}{1} }^{2}$ | ${\href{/padicField/43.6.0.1}{6} }{,}\,{\href{/padicField/43.2.0.1}{2} }$ | ${\href{/padicField/47.2.0.1}{2} }^{3}{,}\,{\href{/padicField/47.1.0.1}{1} }^{2}$ | ${\href{/padicField/53.8.0.1}{8} }$ | ${\href{/padicField/59.8.0.1}{8} }$ |
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 |
|---|---|---|---|---|---|---|---|
|
\(2\)
| 2.1.8.10b1.1 | $x^{8} + 2 x^{3} + 2 x^{2} + 2$ | $8$ | $1$ | $10$ | $\textrm{GL(2,3)}$ | $$[\frac{4}{3}, \frac{4}{3}, \frac{3}{2}]_{3}^{2}$$ |
|
\(3\)
| 3.1.2.1a1.2 | $x^{2} + 6$ | $2$ | $1$ | $1$ | $C_2$ | $$[\ ]_{2}$$ |
| 3.2.3.10a1.5 | $x^{6} + 6 x^{5} + 18 x^{4} + 32 x^{3} + 54 x^{2} + 60 x + 47$ | $3$ | $2$ | $10$ | $D_{6}$ | $$[\frac{5}{2}]_{2}^{2}$$ |
Artin representations
| Label | Dimension | Conductor | Artin stem field | $G$ | Ind | $\chi(c)$ | |
|---|---|---|---|---|---|---|---|
| *48 | 1.1.1t1.a.a | $1$ | $1$ | \(\Q\) | $C_1$ | $1$ | $1$ |
| 1.3.2t1.a.a | $1$ | $ 3 $ | \(\Q(\sqrt{-3}) \) | $C_2$ (as 2T1) | $1$ | $-1$ | |
| 2.972.3t2.d.a | $2$ | $ 2^{2} \cdot 3^{5}$ | \(\Q(\sqrt[3]{6})\) | $S_3$ (as 3T2) | $1$ | $0$ | |
| 2.1944.24t22.a.a | $2$ | $ 2^{3} \cdot 3^{5}$ | 8.2.181398528.1 | $\textrm{GL(2,3)}$ (as 8T23) | $0$ | $0$ | |
| 2.1944.24t22.a.b | $2$ | $ 2^{3} \cdot 3^{5}$ | 8.2.181398528.1 | $\textrm{GL(2,3)}$ (as 8T23) | $0$ | $0$ | |
| 3.11664.6t8.b.a | $3$ | $ 2^{4} \cdot 3^{6}$ | 4.2.3888.1 | $S_4$ (as 4T5) | $1$ | $-1$ | |
| *48 | 3.3888.4t5.b.a | $3$ | $ 2^{4} \cdot 3^{5}$ | 4.2.3888.1 | $S_4$ (as 4T5) | $1$ | $1$ |
| *48 | 4.46656.8t23.a.a | $4$ | $ 2^{6} \cdot 3^{6}$ | 8.2.181398528.1 | $\textrm{GL(2,3)}$ (as 8T23) | $1$ | $0$ |
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 *.