Normalized defining polynomial
\( x^{16} + 4 x^{14} - 30 x^{12} - 64 x^{11} - 16 x^{10} + 384 x^{9} + 154 x^{8} - 768 x^{7} - 128 x^{6} + \cdots + 4 \)
Invariants
Degree: | $16$ | sage: K.degree()
gp: poldegree(K.pol)
magma: Degree(K);
oscar: degree(K)
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Signature: | $[8, 4]$ | sage: K.signature()
gp: K.sign
magma: Signature(K);
oscar: signature(K)
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Discriminant: | \(2817928042905600000000\) \(\medspace = 2^{40}\cdot 3^{8}\cdot 5^{8}\) | sage: K.disc()
gp: K.disc
magma: OK := Integers(K); Discriminant(OK);
oscar: OK = ring_of_integers(K); discriminant(OK)
| |
Root discriminant: | \(21.91\) | 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: | $2^{5/2}3^{1/2}5^{1/2}\approx 21.908902300206645$ | ||
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 not a CM field. |
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $\frac{1}{2}a^{8}$, $\frac{1}{2}a^{9}$, $\frac{1}{6}a^{10}+\frac{1}{6}a^{8}-\frac{1}{3}a^{7}+\frac{1}{3}a^{4}-\frac{1}{3}a-\frac{1}{3}$, $\frac{1}{6}a^{11}+\frac{1}{6}a^{9}+\frac{1}{6}a^{8}+\frac{1}{3}a^{5}-\frac{1}{3}a^{2}-\frac{1}{3}a$, $\frac{1}{18}a^{12}-\frac{1}{18}a^{11}-\frac{1}{18}a^{10}+\frac{1}{6}a^{9}-\frac{1}{6}a^{8}+\frac{2}{9}a^{7}+\frac{1}{9}a^{6}-\frac{1}{9}a^{5}-\frac{2}{9}a^{4}+\frac{2}{9}a^{3}-\frac{1}{3}a^{2}+\frac{1}{3}a-\frac{1}{9}$, $\frac{1}{18}a^{13}+\frac{1}{18}a^{11}-\frac{1}{18}a^{10}+\frac{1}{6}a^{9}+\frac{1}{18}a^{8}-\frac{1}{3}a^{7}-\frac{1}{3}a^{4}-\frac{1}{9}a^{3}-\frac{1}{3}a^{2}+\frac{2}{9}a+\frac{2}{9}$, $\frac{1}{270}a^{14}+\frac{2}{135}a^{13}+\frac{1}{270}a^{12}+\frac{1}{15}a^{11}-\frac{11}{135}a^{10}+\frac{23}{135}a^{9}+\frac{1}{270}a^{8}+\frac{1}{5}a^{7}+\frac{2}{15}a^{6}+\frac{2}{9}a^{5}-\frac{61}{135}a^{4}+\frac{47}{135}a^{3}+\frac{2}{135}a^{2}-\frac{13}{27}a-\frac{52}{135}$, $\frac{1}{1388233890}a^{15}+\frac{110189}{1388233890}a^{14}+\frac{11424013}{694116945}a^{13}-\frac{2155457}{1388233890}a^{12}-\frac{26407661}{694116945}a^{11}+\frac{3157877}{462744630}a^{10}+\frac{10023461}{1388233890}a^{9}+\frac{139525007}{694116945}a^{8}-\frac{12414703}{77124105}a^{7}-\frac{6018472}{46274463}a^{6}+\frac{49293284}{694116945}a^{5}+\frac{112576327}{694116945}a^{4}+\frac{42130867}{694116945}a^{3}-\frac{4722601}{46274463}a^{2}+\frac{61374991}{231372315}a-\frac{41772812}{138823389}$
Monogenic: | No | |
Index: | Not computed | |
Inessential primes: | $3$ |
Class group and class number
Trivial group, which has order $1$ (assuming GRH)
Unit group
Rank: | $11$ | 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: | $\frac{4408}{96795}a^{15}-\frac{6349}{96795}a^{14}+\frac{11024}{96795}a^{13}-\frac{73729}{193590}a^{12}-\frac{171304}{96795}a^{11}-\frac{10196}{6453}a^{10}+\frac{465032}{96795}a^{9}+\frac{4960787}{193590}a^{8}-\frac{71024}{10755}a^{7}-\frac{1848112}{32265}a^{6}+\frac{502054}{96795}a^{5}+\frac{3600359}{96795}a^{4}+\frac{800408}{96795}a^{3}-\frac{281788}{32265}a^{2}-\frac{136084}{32265}a+\frac{12529}{96795}$, $\frac{96686101}{1388233890}a^{15}+\frac{3259891}{277646778}a^{14}+\frac{45949112}{138823389}a^{13}+\frac{213482179}{1388233890}a^{12}-\frac{1220955152}{694116945}a^{11}-\frac{1946882927}{462744630}a^{10}-\frac{1923701174}{694116945}a^{9}+\frac{2909451415}{138823389}a^{8}+\frac{75701054}{15424821}a^{7}-\frac{10374980384}{231372315}a^{6}+\frac{9538295279}{694116945}a^{5}+\frac{27260409271}{694116945}a^{4}-\frac{10319981246}{694116945}a^{3}-\frac{151686658}{8569345}a^{2}+\frac{300820856}{231372315}a+\frac{2200054733}{694116945}$, $\frac{464359}{3910518}a^{15}-\frac{86968}{9776295}a^{14}+\frac{10422751}{19552590}a^{13}+\frac{41152}{9776295}a^{12}-\frac{31895389}{9776295}a^{11}-\frac{7703476}{1086255}a^{10}-\frac{26226553}{9776295}a^{9}+\frac{403788202}{9776295}a^{8}+\frac{3644014}{362085}a^{7}-\frac{250477486}{3258765}a^{6}+\frac{13965032}{1955259}a^{5}+\frac{411946346}{9776295}a^{4}-\frac{46910452}{9776295}a^{3}-\frac{24804479}{3258765}a^{2}+\frac{776}{217251}a+\frac{10241407}{9776295}$, $\frac{91349963}{462744630}a^{15}-\frac{3664726}{46274463}a^{14}+\frac{39347849}{46274463}a^{13}-\frac{15887707}{51416070}a^{12}-\frac{1297471141}{231372315}a^{11}-\frac{2345394194}{231372315}a^{10}+\frac{126091708}{231372315}a^{9}+\frac{2268250421}{30849642}a^{8}-\frac{40386899}{15424821}a^{7}-\frac{1257234368}{8569345}a^{6}+\frac{8771712997}{231372315}a^{5}+\frac{19662356173}{231372315}a^{4}-\frac{3425511518}{231372315}a^{3}-\frac{4003324384}{231372315}a^{2}-\frac{350949116}{231372315}a+\frac{97422448}{77124105}$, $\frac{6853811}{694116945}a^{15}+\frac{20485726}{694116945}a^{14}+\frac{178102313}{1388233890}a^{13}+\frac{21936367}{138823389}a^{12}+\frac{86300059}{694116945}a^{11}-\frac{614709197}{462744630}a^{10}-\frac{6095044519}{1388233890}a^{9}-\frac{4787605103}{1388233890}a^{8}+\frac{61970474}{8569345}a^{7}+\frac{5852214874}{231372315}a^{6}+\frac{628157678}{694116945}a^{5}-\frac{5531575771}{138823389}a^{4}-\frac{4003782623}{694116945}a^{3}+\frac{1338768622}{77124105}a^{2}+\frac{870803672}{231372315}a-\frac{171243073}{694116945}$, $\frac{49691350}{138823389}a^{15}+\frac{195051943}{694116945}a^{14}+\frac{2461863299}{1388233890}a^{13}+\frac{2000449501}{1388233890}a^{12}-\frac{6253318076}{694116945}a^{11}-\frac{6872889002}{231372315}a^{10}-\frac{22280542772}{694116945}a^{9}+\frac{143632630621}{1388233890}a^{8}+\frac{3303613466}{25708035}a^{7}-\frac{31838051159}{231372315}a^{6}-\frac{17524407473}{138823389}a^{5}+\frac{31566651649}{694116945}a^{4}+\frac{38795205577}{694116945}a^{3}+\frac{1051622164}{231372315}a^{2}-\frac{420951202}{46274463}a-\frac{892377052}{694116945}$, $\frac{2354377}{77124105}a^{15}+\frac{1003067}{10283214}a^{14}+\frac{4437205}{30849642}a^{13}+\frac{68577361}{154248210}a^{12}-\frac{21236956}{25708035}a^{11}-\frac{359523752}{77124105}a^{10}-\frac{190253242}{25708035}a^{9}+\frac{72799723}{10283214}a^{8}+\frac{195737186}{5141607}a^{7}-\frac{40047331}{25708035}a^{6}-\frac{4172141789}{77124105}a^{5}-\frac{1081297}{25708035}a^{4}+\frac{1472836621}{77124105}a^{3}+\frac{318958228}{77124105}a^{2}-\frac{12506632}{8569345}a+\frac{20658349}{25708035}$, $\frac{17934487}{1388233890}a^{15}+\frac{26406028}{694116945}a^{14}+\frac{10883399}{1388233890}a^{13}+\frac{74418229}{1388233890}a^{12}-\frac{181870511}{277646778}a^{11}-\frac{192227813}{77124105}a^{10}-\frac{253915804}{138823389}a^{9}+\frac{13098186481}{1388233890}a^{8}+\frac{1978541083}{77124105}a^{7}-\frac{2394146102}{231372315}a^{6}-\frac{43444052362}{694116945}a^{5}-\frac{128907029}{694116945}a^{4}+\frac{7779676103}{138823389}a^{3}+\frac{1882931252}{231372315}a^{2}-\frac{1177571416}{77124105}a-\frac{3651854356}{694116945}$, $\frac{8100358}{694116945}a^{15}-\frac{8695436}{138823389}a^{14}-\frac{10386799}{277646778}a^{13}-\frac{501677611}{1388233890}a^{12}-\frac{581874622}{694116945}a^{11}+\frac{26993837}{51416070}a^{10}+\frac{7650368467}{1388233890}a^{9}+\frac{3692235013}{277646778}a^{8}-\frac{162143038}{15424821}a^{7}-\frac{8274093019}{231372315}a^{6}+\frac{6183554524}{694116945}a^{5}+\frac{18155256746}{694116945}a^{4}+\frac{1578495959}{694116945}a^{3}-\frac{585322136}{231372315}a^{2}-\frac{219064478}{77124105}a-\frac{1461738647}{694116945}$, $\frac{108038}{2904255}a^{15}+\frac{574249}{2904255}a^{14}+\frac{1050346}{2904255}a^{13}+\frac{5812867}{5808510}a^{12}-\frac{12658}{580851}a^{11}-\frac{6985007}{968085}a^{10}-\frac{10683841}{580851}a^{9}-\frac{21630526}{2904255}a^{8}+\frac{19013704}{322695}a^{7}+\frac{56778679}{968085}a^{6}-\frac{204075376}{2904255}a^{5}-\frac{207877022}{2904255}a^{4}+\frac{16668050}{580851}a^{3}+\frac{27700486}{968085}a^{2}-\frac{48824}{968085}a-\frac{3791503}{2904255}$, $\frac{27226861}{694116945}a^{15}-\frac{69620363}{1388233890}a^{14}+\frac{51210944}{694116945}a^{13}-\frac{85400453}{277646778}a^{12}-\frac{1129917526}{694116945}a^{11}-\frac{360044326}{231372315}a^{10}+\frac{6218276341}{1388233890}a^{9}+\frac{33031015637}{1388233890}a^{8}-\frac{160064554}{77124105}a^{7}-\frac{13261135996}{231372315}a^{6}-\frac{5208866597}{694116945}a^{5}+\frac{5929132030}{138823389}a^{4}+\frac{10993121777}{694116945}a^{3}-\frac{1681884109}{231372315}a^{2}-\frac{1170798088}{231372315}a-\frac{607554818}{694116945}$ (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: | \( 85695.3684811 \) (assuming GRH) | sage: K.regulator()
gp: K.reg
magma: Regulator(K);
oscar: regulator(K)
|
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{8}\cdot(2\pi)^{4}\cdot 85695.3684811 \cdot 1}{2\cdot\sqrt{2817928042905600000000}}\cr\approx \mathstrut & 0.322048917807 \end{aligned}\] (assuming GRH)
Galois group
$D_4:C_2^2$ (as 16T23):
A solvable group of order 32 |
The 17 conjugacy class representatives for $Q_8 : C_2^2$ |
Character table for $Q_8 : C_2^2$ |
Intermediate fields
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
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 | ${\href{/padicField/7.4.0.1}{4} }^{4}$ | ${\href{/padicField/11.2.0.1}{2} }^{8}$ | ${\href{/padicField/13.4.0.1}{4} }^{4}$ | ${\href{/padicField/17.4.0.1}{4} }^{4}$ | ${\href{/padicField/19.4.0.1}{4} }^{4}$ | ${\href{/padicField/23.4.0.1}{4} }^{4}$ | ${\href{/padicField/29.2.0.1}{2} }^{8}$ | ${\href{/padicField/31.4.0.1}{4} }^{4}$ | ${\href{/padicField/37.4.0.1}{4} }^{4}$ | ${\href{/padicField/41.2.0.1}{2} }^{8}$ | ${\href{/padicField/43.2.0.1}{2} }^{8}$ | ${\href{/padicField/47.4.0.1}{4} }^{4}$ | ${\href{/padicField/53.2.0.1}{2} }^{8}$ | ${\href{/padicField/59.2.0.1}{2} }^{8}$ |
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 |
---|---|---|---|---|---|---|---|
\(2\) | Deg $16$ | $8$ | $2$ | $40$ | |||
\(3\) | 3.4.2.1 | $x^{4} + 4 x^{3} + 14 x^{2} + 20 x + 13$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ |
3.4.2.1 | $x^{4} + 4 x^{3} + 14 x^{2} + 20 x + 13$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ | |
3.4.2.1 | $x^{4} + 4 x^{3} + 14 x^{2} + 20 x + 13$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ | |
3.4.2.1 | $x^{4} + 4 x^{3} + 14 x^{2} + 20 x + 13$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ | |
\(5\) | 5.4.2.1 | $x^{4} + 48 x^{3} + 670 x^{2} + 2256 x + 1449$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ |
5.4.2.1 | $x^{4} + 48 x^{3} + 670 x^{2} + 2256 x + 1449$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ | |
5.4.2.1 | $x^{4} + 48 x^{3} + 670 x^{2} + 2256 x + 1449$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ | |
5.4.2.1 | $x^{4} + 48 x^{3} + 670 x^{2} + 2256 x + 1449$ | $2$ | $2$ | $2$ | $C_2^2$ | $[\ ]_{2}^{2}$ |