Normalized defining polynomial
\( x^{7} - 2x^{6} + 3x^{5} - 4x^{4} + 4x^{3} - 3x^{2} + x - 1 \)
Invariants
Degree: | $7$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
| |
Signature: | $[1, 3]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
| |
Discriminant: | \(-272671\) \(\medspace = -\,7\cdot 38953\) | sage: K.disc()
gp: K.disc
magma: OK := Integers(K); Discriminant(OK);
oscar: OK = ring_of_integers(K); discriminant(OK)
| |
Root discriminant: | \(5.98\) | 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: | $7^{1/2}38953^{1/2}\approx 522.1790880531314$ | ||
Ramified primes: | \(7\), \(38953\) | sage: K.disc().support()
gp: factor(abs(K.disc))[,1]~
magma: PrimeDivisors(Discriminant(OK));
oscar: prime_divisors(discriminant((OK)))
| |
Discriminant root field: | \(\Q(\sqrt{-272671}) \) | ||
$\card{ \Aut(K/\Q) }$: | $1$ | 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 \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$
Monogenic: | Yes | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
Trivial group, which has order $1$
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: | $a$, $a^{6}-2a^{5}+3a^{4}-3a^{3}+3a^{2}-2a$, $a^{5}-2a^{4}+2a^{3}-3a^{2}+2a-1$ | 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: | \( 0.503526635102 \) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{1}\cdot(2\pi)^{3}\cdot 0.503526635102 \cdot 1}{2\cdot\sqrt{272671}}\cr\approx \mathstrut & 0.2391897572472 \end{aligned}\]
Galois group
A non-solvable group of order 5040 |
The 15 conjugacy class representatives for $S_7$ |
Character table for $S_7$ |
Intermediate fields
The extension is primitive: there are no intermediate fields between this field and $\Q$. |
Sibling fields
Degree 14 sibling: | deg 14 |
Degree 21 sibling: | deg 21 |
Degree 30 sibling: | deg 30 |
Degree 35 sibling: | deg 35 |
Degree 42 siblings: | deg 42, deg 42, deg 42, some 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 | ${\href{/padicField/2.7.0.1}{7} }$ | ${\href{/padicField/3.4.0.1}{4} }{,}\,{\href{/padicField/3.3.0.1}{3} }$ | ${\href{/padicField/5.7.0.1}{7} }$ | R | ${\href{/padicField/11.5.0.1}{5} }{,}\,{\href{/padicField/11.2.0.1}{2} }$ | ${\href{/padicField/13.3.0.1}{3} }{,}\,{\href{/padicField/13.2.0.1}{2} }^{2}$ | ${\href{/padicField/17.5.0.1}{5} }{,}\,{\href{/padicField/17.1.0.1}{1} }^{2}$ | ${\href{/padicField/19.4.0.1}{4} }{,}\,{\href{/padicField/19.2.0.1}{2} }{,}\,{\href{/padicField/19.1.0.1}{1} }$ | ${\href{/padicField/23.6.0.1}{6} }{,}\,{\href{/padicField/23.1.0.1}{1} }$ | ${\href{/padicField/29.7.0.1}{7} }$ | ${\href{/padicField/31.7.0.1}{7} }$ | ${\href{/padicField/37.4.0.1}{4} }{,}\,{\href{/padicField/37.3.0.1}{3} }$ | ${\href{/padicField/41.5.0.1}{5} }{,}\,{\href{/padicField/41.1.0.1}{1} }^{2}$ | ${\href{/padicField/43.5.0.1}{5} }{,}\,{\href{/padicField/43.1.0.1}{1} }^{2}$ | ${\href{/padicField/47.4.0.1}{4} }{,}\,{\href{/padicField/47.3.0.1}{3} }$ | ${\href{/padicField/53.3.0.1}{3} }{,}\,{\href{/padicField/53.2.0.1}{2} }{,}\,{\href{/padicField/53.1.0.1}{1} }^{2}$ | ${\href{/padicField/59.7.0.1}{7} }$ |
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 |
---|---|---|---|---|---|---|---|
\(7\) | 7.2.1.1 | $x^{2} + 21$ | $2$ | $1$ | $1$ | $C_2$ | $[\ ]_{2}$ |
7.5.0.1 | $x^{5} + x + 4$ | $1$ | $5$ | $0$ | $C_5$ | $[\ ]^{5}$ | |
\(38953\) | $\Q_{38953}$ | $x$ | $1$ | $1$ | $0$ | Trivial | $[\ ]$ |
$\Q_{38953}$ | $x$ | $1$ | $1$ | $0$ | Trivial | $[\ ]$ | |
$\Q_{38953}$ | $x$ | $1$ | $1$ | $0$ | Trivial | $[\ ]$ | |
Deg $2$ | $1$ | $2$ | $0$ | $C_2$ | $[\ ]^{2}$ | ||
Deg $2$ | $2$ | $1$ | $1$ | $C_2$ | $[\ ]_{2}$ |
Artin representations
Label | Dimension | Conductor | Artin stem field | $G$ | Ind | $\chi(c)$ | |
---|---|---|---|---|---|---|---|
* | 1.1.1t1.a.a | $1$ | $1$ | \(\Q\) | $C_1$ | $1$ | $1$ |
1.272671.2t1.a.a | $1$ | $ 7 \cdot 38953 $ | \(\Q(\sqrt{-272671}) \) | $C_2$ (as 2T1) | $1$ | $-1$ | |
6.150...351.14t46.a.a | $6$ | $ 7^{5} \cdot 38953^{5}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $0$ | |
* | 6.272671.7t7.a.a | $6$ | $ 7 \cdot 38953 $ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $0$ |
14.552...081.21t38.a.a | $14$ | $ 7^{4} \cdot 38953^{4}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $2$ | |
14.227...201.42t413.a.a | $14$ | $ 7^{10} \cdot 38953^{10}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $-2$ | |
14.833...431.30t565.a.a | $14$ | $ 7^{9} \cdot 38953^{9}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $0$ | |
14.150...351.30t565.a.a | $14$ | $ 7^{5} \cdot 38953^{5}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $0$ | |
15.150...351.42t412.a.a | $15$ | $ 7^{5} \cdot 38953^{5}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $-3$ | |
15.227...201.42t411.a.a | $15$ | $ 7^{10} \cdot 38953^{10}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $3$ | |
20.227...201.70.a.a | $20$ | $ 7^{10} \cdot 38953^{10}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $0$ | |
21.227...201.84.a.a | $21$ | $ 7^{10} \cdot 38953^{10}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $-3$ | |
21.619...871.42t418.a.a | $21$ | $ 7^{11} \cdot 38953^{11}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $3$ | |
35.516...401.126.a.a | $35$ | $ 7^{20} \cdot 38953^{20}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $-1$ | |
35.342...551.70.a.a | $35$ | $ 7^{15} \cdot 38953^{15}$ | 7.1.272671.1 | $S_7$ (as 7T7) | $1$ | $1$ |