Normalized defining polynomial
\( x^{16} + 4x^{12} + 48x^{10} + 246x^{8} - 768x^{6} + 1924x^{4} - 2352x^{2} + 2401 \)
Invariants
Degree: | $16$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
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Signature: | $[0, 8]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
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Discriminant: | \(1495873430980877352960000\) \(\medspace = 2^{52}\cdot 3^{12}\cdot 5^{4}\) | 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: | \(32.43\) | 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: | $2^{13/4}3^{3/4}5^{1/2}\approx 48.49237211223896$ | ||
Ramified primes: | \(2\), \(3\), \(5\) | 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: | \(\Q\) | ||
$\card{ \Aut(K/\Q) }$: | $8$ | sage: K.automorphisms()
magma: Automorphisms(K);
oscar: automorphisms(K)
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This field is not Galois over $\Q$. | |||
This is a CM field. | |||
Reflex fields: | unavailable$^{128}$ |
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $\frac{1}{2}a^{4}-\frac{1}{2}$, $\frac{1}{2}a^{5}-\frac{1}{2}a$, $\frac{1}{2}a^{6}-\frac{1}{2}a^{2}$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{6}-\frac{1}{4}a^{5}-\frac{1}{4}a^{4}-\frac{1}{4}a^{3}+\frac{1}{4}a^{2}+\frac{1}{4}a+\frac{1}{4}$, $\frac{1}{4}a^{8}-\frac{1}{4}$, $\frac{1}{4}a^{9}-\frac{1}{4}a$, $\frac{1}{8}a^{10}-\frac{1}{8}a^{8}-\frac{1}{4}a^{6}-\frac{1}{4}a^{4}+\frac{1}{8}a^{2}+\frac{3}{8}$, $\frac{1}{8}a^{11}-\frac{1}{8}a^{9}-\frac{1}{4}a^{6}-\frac{1}{4}a^{4}-\frac{1}{8}a^{3}+\frac{1}{4}a^{2}+\frac{1}{8}a+\frac{1}{4}$, $\frac{1}{8}a^{12}-\frac{1}{8}a^{8}-\frac{1}{8}a^{4}+\frac{1}{8}$, $\frac{1}{112}a^{13}-\frac{1}{16}a^{12}-\frac{3}{112}a^{9}-\frac{1}{16}a^{8}-\frac{1}{14}a^{7}-\frac{13}{112}a^{5}-\frac{3}{16}a^{4}-\frac{5}{14}a^{3}-\frac{1}{112}a+\frac{5}{16}$, $\frac{1}{1408641808}a^{14}+\frac{137835}{28747792}a^{12}+\frac{24479669}{1408641808}a^{10}-\frac{93992585}{1408641808}a^{8}-\frac{116847653}{1408641808}a^{6}-\frac{221156535}{1408641808}a^{4}-\frac{81305393}{1408641808}a^{2}-\frac{5836635}{28747792}$, $\frac{1}{9860492656}a^{15}+\frac{137835}{201234544}a^{13}-\frac{503761009}{9860492656}a^{11}-\frac{974393715}{9860492656}a^{9}+\frac{587473251}{9860492656}a^{7}-\frac{1}{4}a^{6}+\frac{483164369}{9860492656}a^{5}-\frac{1}{4}a^{4}+\frac{1151256189}{9860492656}a^{3}+\frac{1}{4}a^{2}-\frac{2243161}{201234544}a+\frac{1}{4}$
Monogenic: | Not computed | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
$C_{2}\times C_{2}$, which has order $4$ (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: | $\frac{921161}{704320904}a^{14}+\frac{9593}{14373896}a^{12}+\frac{2233019}{704320904}a^{10}+\frac{41217761}{704320904}a^{8}+\frac{228305955}{704320904}a^{6}-\frac{707621237}{704320904}a^{4}+\frac{895248505}{704320904}a^{2}-\frac{28945181}{14373896}$, $\frac{751}{14373896}a^{14}+\frac{807}{7186948}a^{12}+\frac{18435}{14373896}a^{10}-\frac{3102}{1796737}a^{8}+\frac{47677}{14373896}a^{6}+\frac{6879}{7186948}a^{4}-\frac{39935}{14373896}a^{2}-\frac{1445149}{3593474}$, $\frac{4788405}{9860492656}a^{15}+\frac{921161}{704320904}a^{14}+\frac{3867}{28747792}a^{13}+\frac{9593}{14373896}a^{12}+\frac{26107259}{9860492656}a^{11}+\frac{2233019}{704320904}a^{10}+\frac{227936703}{9860492656}a^{9}+\frac{41217761}{704320904}a^{8}+\frac{1105397299}{9860492656}a^{7}+\frac{228305955}{704320904}a^{6}-\frac{3425884989}{9860492656}a^{5}-\frac{707621237}{704320904}a^{4}+\frac{8717741565}{9860492656}a^{3}+\frac{895248505}{704320904}a^{2}-\frac{359399055}{201234544}a-\frac{14571285}{14373896}$, $\frac{1227011}{704320904}a^{14}+\frac{514}{1796737}a^{12}+\frac{1706923}{704320904}a^{10}+\frac{7394161}{88040113}a^{8}+\frac{320625769}{704320904}a^{6}-\frac{125924263}{88040113}a^{4}+\frac{1275037209}{704320904}a^{2}-\frac{841237}{1796737}$, $\frac{4788405}{9860492656}a^{15}-\frac{751}{14373896}a^{14}+\frac{3867}{28747792}a^{13}-\frac{807}{7186948}a^{12}+\frac{26107259}{9860492656}a^{11}-\frac{18435}{14373896}a^{10}+\frac{227936703}{9860492656}a^{9}+\frac{3102}{1796737}a^{8}+\frac{1105397299}{9860492656}a^{7}-\frac{47677}{14373896}a^{6}-\frac{3425884989}{9860492656}a^{5}-\frac{6879}{7186948}a^{4}+\frac{8717741565}{9860492656}a^{3}+\frac{39935}{14373896}a^{2}-\frac{359399055}{201234544}a+\frac{5038623}{3593474}$, $\frac{2924171}{2465123164}a^{15}-\frac{751}{14373896}a^{14}+\frac{20565}{12577159}a^{13}-\frac{807}{7186948}a^{12}+\frac{15045091}{4930246328}a^{11}-\frac{18435}{14373896}a^{10}+\frac{289280471}{4930246328}a^{9}+\frac{3102}{1796737}a^{8}+\frac{448055999}{1232561582}a^{7}-\frac{47677}{14373896}a^{6}-\frac{1404306663}{2465123164}a^{5}-\frac{6879}{7186948}a^{4}+\frac{1585002899}{4930246328}a^{3}+\frac{39935}{14373896}a^{2}+\frac{32443695}{100617272}a+\frac{5038623}{3593474}$, $\frac{3955997}{1408641808}a^{15}-\frac{1110885}{352160452}a^{14}+\frac{525197}{201234544}a^{13}-\frac{16933}{14373896}a^{12}+\frac{14028383}{1408641808}a^{11}-\frac{1436643}{176080226}a^{10}+\frac{190535321}{1408641808}a^{9}-\frac{97939081}{704320904}a^{8}+\frac{1120804219}{1408641808}a^{7}-\frac{276802035}{352160452}a^{6}-\frac{2355249667}{1408641808}a^{5}+\frac{1713667057}{704320904}a^{4}+\frac{3694307593}{1408641808}a^{3}-\frac{541593021}{176080226}a^{2}-\frac{782928567}{201234544}a+\frac{75984061}{14373896}$ (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)]
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Regulator: | \( 84223.0358383 \) (assuming GRH) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{8}\cdot 84223.0358383 \cdot 4}{2\cdot\sqrt{1495873430980877352960000}}\cr\approx \mathstrut & 0.334543356486 \end{aligned}\] (assuming GRH)
Galois group
$C_2^2:Q_8$ (as 16T31):
A solvable group of order 32 |
The 14 conjugacy class representatives for $C_2^2:Q_8$ |
Character table for $C_2^2:Q_8$ |
Intermediate fields
\(\Q(\sqrt{2}) \), \(\Q(\sqrt{3}) \), \(\Q(\sqrt{6}) \), 4.4.92160.1, \(\Q(\sqrt{2}, \sqrt{3})\), 4.4.92160.2, 8.8.33973862400.1, 8.0.19110297600.3, 8.0.12230590464.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
Galois closure: | deg 32 |
Degree 16 sibling: | deg 16 |
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 | R | ${\href{/padicField/7.4.0.1}{4} }^{4}$ | ${\href{/padicField/11.4.0.1}{4} }^{4}$ | ${\href{/padicField/13.4.0.1}{4} }^{4}$ | ${\href{/padicField/17.4.0.1}{4} }^{4}$ | ${\href{/padicField/19.4.0.1}{4} }^{4}$ | ${\href{/padicField/23.2.0.1}{2} }^{8}$ | ${\href{/padicField/29.4.0.1}{4} }^{4}$ | ${\href{/padicField/31.4.0.1}{4} }^{4}$ | ${\href{/padicField/37.4.0.1}{4} }^{4}$ | ${\href{/padicField/41.4.0.1}{4} }^{4}$ | ${\href{/padicField/43.4.0.1}{4} }^{4}$ | ${\href{/padicField/47.2.0.1}{2} }^{4}{,}\,{\href{/padicField/47.1.0.1}{1} }^{8}$ | ${\href{/padicField/53.4.0.1}{4} }^{4}$ | ${\href{/padicField/59.4.0.1}{4} }^{4}$ |
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 |
---|---|---|---|---|---|---|---|
\(2\) | 2.16.52.18 | $x^{16} + 4 x^{14} + 8 x^{13} + 8 x^{11} + 12 x^{10} + 2 x^{8} + 8 x^{7} + 8 x^{5} + 14$ | $16$ | $1$ | $52$ | 16T31 | $[2, 3, 3, 4]^{2}$ |
\(3\) | 3.8.6.1 | $x^{8} + 9$ | $4$ | $2$ | $6$ | $Q_8$ | $[\ ]_{4}^{2}$ |
3.8.6.1 | $x^{8} + 9$ | $4$ | $2$ | $6$ | $Q_8$ | $[\ ]_{4}^{2}$ | |
\(5\) | 5.4.0.1 | $x^{4} + 4 x^{2} + 4 x + 2$ | $1$ | $4$ | $0$ | $C_4$ | $[\ ]^{4}$ |
5.4.0.1 | $x^{4} + 4 x^{2} + 4 x + 2$ | $1$ | $4$ | $0$ | $C_4$ | $[\ ]^{4}$ | |
5.8.4.1 | $x^{8} + 80 x^{7} + 2428 x^{6} + 33688 x^{5} + 195810 x^{4} + 305952 x^{3} + 870132 x^{2} + 1037416 x + 503089$ | $2$ | $4$ | $4$ | $C_4\times C_2$ | $[\ ]_{2}^{4}$ |