Normalized defining polynomial
\( x^{8} - x^{7} - 42x^{6} + 77x^{5} + 420x^{4} - 854x^{3} - 987x^{2} + 1577x + 733 \)
Invariants
Degree: | $8$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
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Signature: | $[8, 0]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
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Discriminant: | \(12782719397154721\) \(\medspace = 7^{12}\cdot 31^{4}\) | sage: K.disc()
gp: K.disc
magma: OK := Integers(K); Discriminant(OK);
oscar: OK = ring_of_integers(K); discriminant(OK)
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Root discriminant: | \(103.12\) | 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))
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Galois root discriminant: | $7^{12/7}31^{1/2}\approx 156.46613112957195$ | ||
Ramified primes: | \(7\), \(31\) | sage: K.disc().support()
gp: factor(abs(K.disc))[,1]~
magma: PrimeDivisors(Discriminant(OK));
oscar: prime_divisors(discriminant((OK)))
| |
Discriminant root field: | \(\Q\) | ||
$\card{ \Aut(K/\Q) }$: | $1$ | 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 \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $\frac{1}{1081841}a^{7}+\frac{172360}{1081841}a^{6}-\frac{293783}{1081841}a^{5}-\frac{81740}{1081841}a^{4}+\frac{27623}{1081841}a^{3}-\frac{55192}{1081841}a^{2}-\frac{321386}{1081841}a+\frac{175795}{1081841}$
Monogenic: | Not computed | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
Trivial group, which has order $1$ (assuming GRH)
Unit group
Rank: | $7$ | sage: UK.rank()
gp: K.fu
magma: UnitRank(K);
oscar: rank(UK)
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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)
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Fundamental units: | $\frac{19847}{1081841}a^{7}+\frac{47678}{1081841}a^{6}-\frac{670052}{1081841}a^{5}-\frac{614121}{1081841}a^{4}+\frac{6231340}{1081841}a^{3}+\frac{509309}{1081841}a^{2}-\frac{11913657}{1081841}a-\frac{1015701}{1081841}$, $\frac{181077}{1081841}a^{7}+\frac{400711}{1081841}a^{6}-\frac{6467844}{1081841}a^{5}-\frac{7058305}{1081841}a^{4}+\frac{58958442}{1081841}a^{3}+\frac{36827968}{1081841}a^{2}-\frac{111569432}{1081841}a-\frac{69978034}{1081841}$, $\frac{337135}{1081841}a^{7}+\frac{744808}{1081841}a^{6}-\frac{11724724}{1081841}a^{5}-\frac{11579358}{1081841}a^{4}+\frac{102967672}{1081841}a^{3}+\frac{41620238}{1081841}a^{2}-\frac{188005930}{1081841}a-\frac{71249684}{1081841}$, $\frac{219949}{1081841}a^{7}+\frac{537318}{1081841}a^{6}-\frac{7568865}{1081841}a^{5}-\frac{9252250}{1081841}a^{4}+\frac{67106313}{1081841}a^{3}+\frac{39940770}{1081841}a^{2}-\frac{131941135}{1081841}a-\frac{55318617}{1081841}$, $\frac{451018}{1081841}a^{7}+\frac{695584}{1081841}a^{6}-\frac{17008552}{1081841}a^{5}-\frac{7888450}{1081841}a^{4}+\frac{164429090}{1081841}a^{3}+\frac{18967251}{1081841}a^{2}-\frac{364984980}{1081841}a-\frac{139893228}{1081841}$, $\frac{23368}{1081841}a^{7}+\frac{14437}{1081841}a^{6}-\frac{839999}{1081841}a^{5}+\frac{430886}{1081841}a^{4}+\frac{6126233}{1081841}a^{3}-\frac{3417707}{1081841}a^{2}-\frac{6498872}{1081841}a-\frac{1936399}{1081841}$, $\frac{11893}{56939}a^{7}+\frac{16541}{56939}a^{6}-\frac{468874}{56939}a^{5}-\frac{185090}{56939}a^{4}+\frac{4936002}{56939}a^{3}+\frac{620665}{56939}a^{2}-\frac{13707866}{56939}a-\frac{5479350}{56939}$ (assuming GRH) | 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: | \( 942691.948946 \) (assuming GRH) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{8}\cdot(2\pi)^{0}\cdot 942691.948946 \cdot 1}{2\cdot\sqrt{12782719397154721}}\cr\approx \mathstrut & 1.06725485695 \end{aligned}\] (assuming GRH)
Galois group
A solvable group of order 56 |
The 8 conjugacy class representatives for $C_2^3:C_7$ |
Character table for $C_2^3:C_7$ |
Intermediate fields
The extension is primitive: there are no intermediate fields between this field and $\Q$. |
Sibling fields
Degree 14 sibling: | deg 14 |
Degree 28 sibling: | deg 28 |
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 | ${\href{/padicField/2.7.0.1}{7} }{,}\,{\href{/padicField/2.1.0.1}{1} }$ | ${\href{/padicField/3.7.0.1}{7} }{,}\,{\href{/padicField/3.1.0.1}{1} }$ | ${\href{/padicField/5.7.0.1}{7} }{,}\,{\href{/padicField/5.1.0.1}{1} }$ | R | ${\href{/padicField/11.7.0.1}{7} }{,}\,{\href{/padicField/11.1.0.1}{1} }$ | ${\href{/padicField/13.7.0.1}{7} }{,}\,{\href{/padicField/13.1.0.1}{1} }$ | ${\href{/padicField/17.7.0.1}{7} }{,}\,{\href{/padicField/17.1.0.1}{1} }$ | ${\href{/padicField/19.2.0.1}{2} }^{4}$ | ${\href{/padicField/23.7.0.1}{7} }{,}\,{\href{/padicField/23.1.0.1}{1} }$ | ${\href{/padicField/29.7.0.1}{7} }{,}\,{\href{/padicField/29.1.0.1}{1} }$ | R | ${\href{/padicField/37.7.0.1}{7} }{,}\,{\href{/padicField/37.1.0.1}{1} }$ | ${\href{/padicField/41.7.0.1}{7} }{,}\,{\href{/padicField/41.1.0.1}{1} }$ | ${\href{/padicField/43.7.0.1}{7} }{,}\,{\href{/padicField/43.1.0.1}{1} }$ | ${\href{/padicField/47.7.0.1}{7} }{,}\,{\href{/padicField/47.1.0.1}{1} }$ | ${\href{/padicField/53.7.0.1}{7} }{,}\,{\href{/padicField/53.1.0.1}{1} }$ | ${\href{/padicField/59.7.0.1}{7} }{,}\,{\href{/padicField/59.1.0.1}{1} }$ |
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 |
---|---|---|---|---|---|---|---|
\(7\) | $\Q_{7}$ | $x + 4$ | $1$ | $1$ | $0$ | Trivial | $[\ ]$ |
7.7.12.1 | $x^{7} + 42 x^{6} + 7$ | $7$ | $1$ | $12$ | $C_7$ | $[2]$ | |
\(31\) | 31.4.2.1 | $x^{4} + 58 x^{3} + 909 x^{2} + 1972 x + 26855$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ |
31.4.2.1 | $x^{4} + 58 x^{3} + 909 x^{2} + 1972 x + 26855$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ |
Artin representations
Label | Dimension | Conductor | Artin stem field | $G$ | Ind | $\chi(c)$ | |
---|---|---|---|---|---|---|---|
* | 1.1.1t1.a.a | $1$ | $1$ | \(\Q\) | $C_1$ | $1$ | $1$ |
1.49.7t1.a.a | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
1.49.7t1.a.b | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
1.49.7t1.a.c | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
1.49.7t1.a.d | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
1.49.7t1.a.e | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
1.49.7t1.a.f | $1$ | $ 7^{2}$ | 7.7.13841287201.1 | $C_7$ (as 7T1) | $0$ | $1$ | |
* | 7.127...721.8t25.a.a | $7$ | $ 7^{12} \cdot 31^{4}$ | 8.8.12782719397154721.1 | $C_2^3:C_7$ (as 8T25) | $1$ | $7$ |