Normalized defining polynomial
\( x^{16} + 4x^{12} - 96x^{10} + 150x^{8} + 96x^{6} + 4x^{4} + 1 \)
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: | \(2393397489569403764736\) \(\medspace = 2^{52}\cdot 3^{12}\) | 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: | \(21.69\) | 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: | $2^{13/4}3^{3/4}\approx 21.686448086636275$ | ||
Ramified primes: | \(2\), \(3\) | 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: | \(\Q\) | ||
$\card{ \Aut(K/\Q) }$: | $4$ | sage: K.automorphisms()
magma: Automorphisms(K);
oscar: automorphisms(K)
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This field is not Galois over $\Q$. | |||
This is not a CM field. |
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $\frac{1}{2}a^{4}-\frac{1}{2}$, $\frac{1}{2}a^{5}-\frac{1}{2}a$, $\frac{1}{2}a^{6}-\frac{1}{2}a^{2}$, $\frac{1}{4}a^{7}-\frac{1}{4}a^{6}-\frac{1}{4}a^{5}-\frac{1}{4}a^{4}-\frac{1}{4}a^{3}+\frac{1}{4}a^{2}+\frac{1}{4}a+\frac{1}{4}$, $\frac{1}{4}a^{8}-\frac{1}{4}$, $\frac{1}{4}a^{9}-\frac{1}{4}a$, $\frac{1}{40}a^{10}-\frac{1}{8}a^{8}-\frac{3}{20}a^{6}+\frac{1}{20}a^{4}+\frac{1}{8}a^{2}+\frac{3}{40}$, $\frac{1}{40}a^{11}-\frac{1}{8}a^{9}+\frac{1}{10}a^{7}-\frac{1}{4}a^{6}-\frac{1}{5}a^{5}-\frac{1}{4}a^{4}-\frac{1}{8}a^{3}+\frac{1}{4}a^{2}+\frac{13}{40}a+\frac{1}{4}$, $\frac{1}{40}a^{12}-\frac{1}{40}a^{8}-\frac{1}{5}a^{6}-\frac{1}{8}a^{4}+\frac{1}{5}a^{2}+\frac{1}{8}$, $\frac{1}{80}a^{13}-\frac{1}{80}a^{12}+\frac{9}{80}a^{9}-\frac{9}{80}a^{8}-\frac{1}{10}a^{7}+\frac{1}{10}a^{6}-\frac{1}{16}a^{5}+\frac{1}{16}a^{4}+\frac{1}{10}a^{3}-\frac{1}{10}a^{2}-\frac{1}{16}a+\frac{1}{16}$, $\frac{1}{80}a^{14}-\frac{1}{80}a^{12}-\frac{1}{80}a^{10}-\frac{7}{80}a^{8}-\frac{17}{80}a^{6}-\frac{7}{80}a^{4}+\frac{17}{80}a^{2}+\frac{3}{16}$, $\frac{1}{80}a^{15}-\frac{1}{80}a^{12}-\frac{1}{80}a^{11}+\frac{1}{40}a^{9}-\frac{9}{80}a^{8}-\frac{1}{16}a^{7}-\frac{3}{20}a^{6}+\frac{1}{10}a^{5}-\frac{3}{16}a^{4}+\frac{1}{16}a^{3}+\frac{3}{20}a^{2}-\frac{1}{8}a+\frac{5}{16}$
Monogenic: | Not computed | |
Index: | $1$ | |
Inessential primes: | None |
Class group and class number
$C_{2}$, which has order $2$
Unit group
Rank: | $7$ | sage: UK.rank()
gp: K.fu
magma: UnitRank(K);
oscar: rank(UK)
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Torsion generator: | \( \frac{1}{4} a^{14} - \frac{3}{20} a^{12} + \frac{21}{20} a^{10} - \frac{123}{5} a^{8} + \frac{1043}{20} a^{6} - \frac{63}{20} a^{4} - \frac{109}{20} a^{2} + \frac{9}{10} \) (order $4$) | 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: | $a$, $\frac{33}{80}a^{15}-\frac{13}{80}a^{13}+\frac{133}{80}a^{11}-\frac{3221}{80}a^{9}+\frac{6203}{80}a^{7}+\frac{1121}{80}a^{5}-\frac{849}{80}a^{3}-\frac{127}{80}a$, $\frac{1}{8}a^{14}+\frac{1}{20}a^{12}+\frac{21}{40}a^{10}-\frac{59}{5}a^{8}+\frac{563}{40}a^{6}+\frac{341}{20}a^{4}+\frac{371}{40}a^{2}+\frac{17}{10}$, $\frac{27}{80}a^{15}+\frac{1}{8}a^{14}+\frac{3}{80}a^{13}+\frac{1}{20}a^{12}+\frac{101}{80}a^{11}+\frac{21}{40}a^{10}-\frac{2579}{80}a^{9}-\frac{59}{5}a^{8}+\frac{3733}{80}a^{7}+\frac{563}{40}a^{6}+\frac{3717}{80}a^{5}+\frac{341}{20}a^{4}-\frac{741}{80}a^{3}+\frac{371}{40}a^{2}-\frac{501}{80}a+\frac{27}{10}$, $\frac{1}{8}a^{15}-\frac{1}{8}a^{14}-\frac{7}{40}a^{13}+\frac{1}{5}a^{12}+\frac{9}{20}a^{11}-\frac{21}{40}a^{10}-\frac{127}{10}a^{9}+\frac{64}{5}a^{8}+\frac{1413}{40}a^{7}-\frac{1523}{40}a^{6}-\frac{379}{40}a^{5}+\frac{101}{5}a^{4}-\frac{239}{10}a^{3}+\frac{589}{40}a^{2}-\frac{93}{20}a+\frac{4}{5}$, $\frac{19}{40}a^{15}-\frac{11}{80}a^{14}-\frac{1}{4}a^{13}-\frac{1}{80}a^{12}+\frac{39}{20}a^{11}-\frac{43}{80}a^{10}-\frac{1867}{40}a^{9}+\frac{1059}{80}a^{8}+\frac{3813}{40}a^{7}-\frac{1533}{80}a^{6}+\frac{53}{20}a^{5}-\frac{1231}{80}a^{4}-\frac{35}{4}a^{3}-\frac{493}{80}a^{2}+\frac{51}{40}a-\frac{67}{80}$, $\frac{29}{80}a^{15}+\frac{1}{2}a^{14}-\frac{23}{80}a^{13}-\frac{1}{8}a^{12}+\frac{25}{16}a^{11}+\frac{81}{40}a^{10}-\frac{2879}{80}a^{9}-\frac{97}{2}a^{8}+\frac{1319}{16}a^{7}+\frac{871}{10}a^{6}-\frac{309}{16}a^{5}+\frac{1077}{40}a^{4}-\frac{429}{80}a^{3}-\frac{45}{8}a^{2}+\frac{207}{80}a+\frac{7}{10}$ | 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: | \( 46193.7886141 \) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{8}\cdot 46193.7886141 \cdot 2}{4\cdot\sqrt{2393397489569403764736}}\cr\approx \mathstrut & 1.14679322423 \end{aligned}\]
Galois group
$C_4^2:C_2$ (as 16T30):
A solvable group of order 32 |
The 14 conjugacy class representatives for $C_4^2:C_2$ |
Character table for $C_4^2:C_2$ |
Intermediate fields
\(\Q(\sqrt{-1}) \), \(\Q(\sqrt{-6}) \), \(\Q(\sqrt{6}) \), 4.2.18432.2, \(\Q(i, \sqrt{6})\), 4.2.18432.1, 8.0.1358954496.8, 8.0.764411904.4, 8.0.12230590464.2 |
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: | 16.4.2393397489569403764736.1 |
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 | ${\href{/padicField/5.2.0.1}{2} }^{6}{,}\,{\href{/padicField/5.1.0.1}{1} }^{4}$ | ${\href{/padicField/7.4.0.1}{4} }^{4}$ | ${\href{/padicField/11.4.0.1}{4} }^{4}$ | ${\href{/padicField/13.4.0.1}{4} }^{4}$ | ${\href{/padicField/17.4.0.1}{4} }^{4}$ | ${\href{/padicField/19.4.0.1}{4} }^{4}$ | ${\href{/padicField/23.2.0.1}{2} }^{8}$ | ${\href{/padicField/29.2.0.1}{2} }^{6}{,}\,{\href{/padicField/29.1.0.1}{1} }^{4}$ | ${\href{/padicField/31.4.0.1}{4} }^{4}$ | ${\href{/padicField/37.4.0.1}{4} }^{4}$ | ${\href{/padicField/41.4.0.1}{4} }^{4}$ | ${\href{/padicField/43.4.0.1}{4} }^{4}$ | ${\href{/padicField/47.2.0.1}{2} }^{8}$ | ${\href{/padicField/53.2.0.1}{2} }^{6}{,}\,{\href{/padicField/53.1.0.1}{1} }^{4}$ | ${\href{/padicField/59.4.0.1}{4} }^{4}$ |
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 |
---|---|---|---|---|---|---|---|
\(2\) | 2.16.52.12 | $x^{16} + 8 x^{14} + 4 x^{10} + 8 x^{9} + 10 x^{8} + 8 x^{6} + 8 x^{5} + 26$ | $16$ | $1$ | $52$ | 16T30 | $[2, 3, 3, 4]^{2}$ |
\(3\) | 3.8.6.1 | $x^{8} + 9$ | $4$ | $2$ | $6$ | $Q_8$ | $[\ ]_{4}^{2}$ |
3.8.6.1 | $x^{8} + 9$ | $4$ | $2$ | $6$ | $Q_8$ | $[\ ]_{4}^{2}$ |