Normalized defining polynomial
\( x^{7} - 609x^{5} - 2233x^{4} + 48111x^{3} - 40194x^{2} - 87696x + 77517 \)
Invariants
Degree: | $7$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
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Signature: | $[7, 0]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
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Discriminant: | \(8233120419813614521\) \(\medspace = 7^{12}\cdot 29^{6}\) | 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: | \(503.76\) | 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))
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Galois root discriminant: | $7^{12/7}29^{6/7}\approx 503.75978549322235$ | ||
Ramified primes: | \(7\), \(29\) | sage: K.disc().support()
gp: factor(abs(K.disc))[,1]~
magma: PrimeDivisors(Discriminant(OK));
oscar: prime_divisors(discriminant((OK)))
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Discriminant root field: | \(\Q\) | ||
$\card{ \Gal(K/\Q) }$: | $7$ | sage: K.automorphisms()
magma: Automorphisms(K);
oscar: automorphisms(K)
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This field is Galois and abelian over $\Q$. | |||
Conductor: | \(1421=7^{2}\cdot 29\) | ||
Dirichlet character group: | $\lbrace$$\chi_{1421}(1408,·)$, $\chi_{1421}(1,·)$, $\chi_{1421}(645,·)$, $\chi_{1421}(1009,·)$, $\chi_{1421}(169,·)$, $\chi_{1421}(141,·)$, $\chi_{1421}(1093,·)$$\rbrace$ | ||
This is not a CM field. |
Integral basis (with respect to field generator \(a\))
$1$, $a$, $\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{9}a^{3}-\frac{1}{9}a^{2}$, $\frac{1}{27}a^{4}-\frac{1}{27}a^{3}-\frac{1}{3}a$, $\frac{1}{2673}a^{5}-\frac{1}{243}a^{4}+\frac{10}{2673}a^{3}+\frac{2}{27}a^{2}+\frac{113}{297}a+\frac{1}{3}$, $\frac{1}{3440151}a^{6}+\frac{478}{3440151}a^{5}+\frac{36112}{3440151}a^{4}+\frac{43111}{1146717}a^{3}+\frac{49976}{382239}a^{2}+\frac{401}{127413}a+\frac{586}{1287}$
Monogenic: | No | |
Index: | $81$ | |
Inessential primes: | $3$ |
Class group and class number
$C_{7}$, which has order $7$
Unit group
Rank: | $6$ | 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: | $\frac{73615}{3440151}a^{6}-\frac{213539}{3440151}a^{5}-\frac{52029398}{3440151}a^{4}-\frac{71655908}{1146717}a^{3}+\frac{430333979}{382239}a^{2}-\frac{587176}{127413}a-\frac{2776622}{1287}$, $\frac{1397270}{3440151}a^{6}+\frac{35742539}{3440151}a^{5}+\frac{30300704}{3440151}a^{4}-\frac{902246905}{1146717}a^{3}+\frac{277063387}{382239}a^{2}+\frac{185489257}{127413}a-\frac{1703035}{1287}$, $\frac{273825632}{3440151}a^{6}-\frac{5064132157}{3440151}a^{5}-\frac{73104728194}{3440151}a^{4}+\frac{246854623307}{1146717}a^{3}-\frac{57965025890}{382239}a^{2}-\frac{50390038937}{127413}a+\frac{429474164}{1287}$, $\frac{1129933}{3440151}a^{6}+\frac{970804}{3440151}a^{5}-\frac{686558039}{3440151}a^{4}-\frac{1032302729}{1146717}a^{3}+\frac{5739139610}{382239}a^{2}-\frac{90474616}{127413}a-\frac{35553116}{1287}$, $\frac{20792}{382239}a^{6}-\frac{62987}{382239}a^{5}-\frac{11538914}{382239}a^{4}-\frac{24164524}{382239}a^{3}+\frac{25609751}{14157}a^{2}-\frac{1498280}{42471}a-\frac{1508401}{429}$, $\frac{739663}{3440151}a^{6}-\frac{3644075}{3440151}a^{5}-\frac{449338517}{3440151}a^{4}+\frac{186320686}{1146717}a^{3}+\frac{4785871709}{382239}a^{2}-\frac{7512413497}{127413}a+\frac{54716170}{1287}$ | sage: UK.fundamental_units()
gp: K.fu
magma: [K|fUK(g): g in Generators(UK)];
oscar: [K(fUK(a)) for a in gens(UK)]
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Regulator: | \( 64309241.25 \) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{7}\cdot(2\pi)^{0}\cdot 64309241.25 \cdot 7}{2\cdot\sqrt{8233120419813614521}}\cr\approx \mathstrut & 10.04081963 \end{aligned}\]
Galois group
A cyclic group of order 7 |
The 7 conjugacy class representatives for $C_7$ |
Character table for $C_7$ |
Intermediate fields
The extension is primitive: there are no intermediate fields between this field and $\Q$. |
Frobenius cycle types
$p$ | $2$ | $3$ | $5$ | $7$ | $11$ | $13$ | $17$ | $19$ | $23$ | $29$ | $31$ | $37$ | $41$ | $43$ | $47$ | $53$ | $59$ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cycle type | ${\href{/padicField/2.7.0.1}{7} }$ | ${\href{/padicField/3.1.0.1}{1} }^{7}$ | ${\href{/padicField/5.7.0.1}{7} }$ | R | ${\href{/padicField/11.1.0.1}{1} }^{7}$ | ${\href{/padicField/13.1.0.1}{1} }^{7}$ | ${\href{/padicField/17.7.0.1}{7} }$ | ${\href{/padicField/19.7.0.1}{7} }$ | ${\href{/padicField/23.7.0.1}{7} }$ | R | ${\href{/padicField/31.7.0.1}{7} }$ | ${\href{/padicField/37.7.0.1}{7} }$ | ${\href{/padicField/41.7.0.1}{7} }$ | ${\href{/padicField/43.7.0.1}{7} }$ | ${\href{/padicField/47.1.0.1}{1} }^{7}$ | ${\href{/padicField/53.1.0.1}{1} }^{7}$ | ${\href{/padicField/59.7.0.1}{7} }$ |
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 |
---|---|---|---|---|---|---|---|
\(7\) | 7.7.12.7 | $x^{7} + 42 x^{6} + 301$ | $7$ | $1$ | $12$ | $C_7$ | $[2]$ |
\(29\) | 29.7.6.5 | $x^{7} + 58$ | $7$ | $1$ | $6$ | $C_7$ | $[\ ]_{7}$ |