Normalized defining polynomial
\( x^{20} - 12x^{15} + 179x^{10} - 858x^{5} + 1331 \)
Invariants
| Degree: | $20$ |
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| Signature: | $(0, 10)$ |
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| Discriminant: |
\(1597098119556903839111328125\)
\(\medspace = 5^{27}\cdot 11^{8}\)
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| Root discriminant: | \(22.92\) |
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| Galois root discriminant: | $5^{143/100}11^{4/5}\approx 68.02072465087673$ | ||
| Ramified primes: |
\(5\), \(11\)
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| Discriminant root field: | \(\Q(\sqrt{5}) \) | ||
| $\Aut(K/\Q)$: | $C_5$ |
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| This field is not Galois over $\Q$. | |||
| This is not a CM field. | |||
| Maximal CM subfield: | \(\Q(\zeta_{5})\) | ||
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $\frac{1}{5}a^{7}-\frac{1}{5}a^{6}-\frac{1}{5}a^{5}+\frac{2}{5}a^{2}-\frac{2}{5}a-\frac{2}{5}$, $\frac{1}{5}a^{8}-\frac{2}{5}a^{6}-\frac{1}{5}a^{5}+\frac{2}{5}a^{3}+\frac{1}{5}a-\frac{2}{5}$, $\frac{1}{5}a^{9}+\frac{2}{5}a^{6}-\frac{2}{5}a^{5}+\frac{2}{5}a^{4}-\frac{1}{5}a+\frac{1}{5}$, $\frac{1}{110}a^{10}+\frac{49}{110}a^{5}-\frac{1}{10}$, $\frac{1}{110}a^{11}+\frac{49}{110}a^{6}-\frac{1}{10}a$, $\frac{1}{110}a^{12}+\frac{1}{22}a^{7}+\frac{2}{5}a^{6}+\frac{2}{5}a^{5}+\frac{1}{10}a^{2}-\frac{1}{5}a-\frac{1}{5}$, $\frac{1}{110}a^{13}+\frac{1}{22}a^{8}-\frac{1}{5}a^{6}+\frac{2}{5}a^{5}+\frac{1}{10}a^{3}-\frac{2}{5}a-\frac{1}{5}$, $\frac{1}{550}a^{14}-\frac{1}{275}a^{13}-\frac{1}{550}a^{12}+\frac{1}{275}a^{11}+\frac{1}{550}a^{10}+\frac{49}{550}a^{9}+\frac{6}{275}a^{8}-\frac{49}{550}a^{7}-\frac{61}{275}a^{6}-\frac{61}{550}a^{5}-\frac{21}{50}a^{4}+\frac{6}{25}a^{3}+\frac{21}{50}a^{2}+\frac{9}{25}a+\frac{9}{50}$, $\frac{1}{550}a^{15}+\frac{1}{550}a^{10}+\frac{167}{550}a^{5}+\frac{4}{25}$, $\frac{1}{550}a^{16}+\frac{1}{550}a^{11}+\frac{167}{550}a^{6}+\frac{4}{25}a$, $\frac{1}{550}a^{17}+\frac{1}{550}a^{12}-\frac{53}{550}a^{7}+\frac{2}{5}a^{6}+\frac{2}{5}a^{5}+\frac{9}{25}a^{2}-\frac{1}{5}a-\frac{1}{5}$, $\frac{1}{6050}a^{18}+\frac{21}{6050}a^{13}-\frac{503}{6050}a^{8}-\frac{6}{275}a^{3}$, $\frac{1}{6050}a^{19}-\frac{1}{6050}a^{14}-\frac{1}{550}a^{13}+\frac{1}{275}a^{12}+\frac{1}{550}a^{11}-\frac{1}{275}a^{10}-\frac{371}{6050}a^{9}-\frac{49}{550}a^{8}-\frac{6}{275}a^{7}-\frac{171}{550}a^{6}-\frac{104}{275}a^{5}+\frac{12}{55}a^{4}+\frac{21}{50}a^{3}-\frac{6}{25}a^{2}-\frac{11}{50}a+\frac{11}{25}$
| Monogenic: | No | |
| Index: | Not computed | |
| Inessential primes: | $2$ |
Class group and class number
| Ideal class group: | Trivial group, which has order $1$ |
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| Narrow class group: | Trivial group, which has order $1$ |
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Unit group
| Rank: | $9$ |
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| Torsion generator: |
\( \frac{3}{550} a^{15} - \frac{1}{25} a^{10} + \frac{188}{275} a^{5} - \frac{51}{50} \)
(order $10$)
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| Fundamental units: |
$\frac{1}{550}a^{15}-\frac{9}{550}a^{10}+\frac{227}{550}a^{5}-\frac{41}{25}$, $\frac{19}{6050}a^{19}+\frac{13}{6050}a^{18}+\frac{2}{275}a^{16}-\frac{1}{550}a^{15}-\frac{92}{3025}a^{14}-\frac{101}{6050}a^{13}-\frac{1}{275}a^{12}-\frac{37}{550}a^{11}+\frac{1}{50}a^{10}+\frac{1508}{3025}a^{9}+\frac{351}{1210}a^{8}+\frac{6}{275}a^{7}+\frac{639}{550}a^{6}-\frac{239}{550}a^{5}-\frac{171}{110}a^{4}-\frac{56}{275}a^{3}-\frac{19}{25}a^{2}-\frac{147}{50}a+\frac{7}{5}$, $\frac{19}{6050}a^{19}+\frac{4}{3025}a^{18}+\frac{3}{550}a^{17}+\frac{1}{275}a^{16}+\frac{1}{275}a^{15}-\frac{92}{3025}a^{14}-\frac{48}{3025}a^{13}-\frac{29}{550}a^{12}-\frac{19}{550}a^{11}-\frac{13}{275}a^{10}+\frac{1508}{3025}a^{9}+\frac{119}{605}a^{8}+\frac{43}{50}a^{7}+\frac{59}{110}a^{6}+\frac{196}{275}a^{5}-\frac{171}{110}a^{4}-\frac{301}{275}a^{3}-\frac{62}{25}a^{2}-\frac{113}{50}a-\frac{68}{25}$, $\frac{7}{3025}a^{19}-\frac{3}{3025}a^{18}-\frac{1}{550}a^{17}-\frac{1}{550}a^{16}+\frac{3}{550}a^{15}-\frac{27}{1210}a^{14}+\frac{17}{6050}a^{13}+\frac{4}{275}a^{12}+\frac{8}{275}a^{11}-\frac{8}{275}a^{10}+\frac{2187}{6050}a^{9}-\frac{173}{1210}a^{8}-\frac{83}{275}a^{7}-\frac{107}{275}a^{6}+\frac{9}{11}a^{5}-\frac{509}{550}a^{4}+\frac{39}{550}a^{3}+\frac{23}{50}a^{2}+\frac{3}{2}a-\frac{67}{50}$, $\frac{19}{6050}a^{19}-\frac{23}{6050}a^{18}+\frac{1}{275}a^{17}-\frac{3}{550}a^{16}-\frac{92}{3025}a^{14}+\frac{243}{6050}a^{13}-\frac{3}{110}a^{12}+\frac{21}{550}a^{11}-\frac{3}{550}a^{10}+\frac{1508}{3025}a^{9}-\frac{3677}{6050}a^{8}+\frac{271}{550}a^{7}-\frac{17}{22}a^{6}+\frac{73}{550}a^{5}-\frac{171}{110}a^{4}+\frac{109}{55}a^{3}-\frac{37}{50}a^{2}+\frac{36}{25}a+\frac{3}{50}$, $\frac{2}{3025}a^{19}-\frac{19}{6050}a^{18}-\frac{1}{275}a^{17}-\frac{1}{275}a^{16}-\frac{1}{550}a^{15}-\frac{3}{1210}a^{14}+\frac{92}{3025}a^{13}+\frac{17}{550}a^{12}+\frac{1}{22}a^{11}+\frac{2}{55}a^{10}+\frac{397}{6050}a^{9}-\frac{1508}{3025}a^{8}-\frac{283}{550}a^{7}-\frac{331}{550}a^{6}-\frac{119}{275}a^{5}+\frac{51}{550}a^{4}+\frac{171}{110}a^{3}+\frac{3}{2}a^{2}+\frac{127}{50}a+\frac{101}{50}$, $\frac{1}{1210}a^{19}+\frac{9}{6050}a^{18}-\frac{1}{550}a^{17}-\frac{1}{275}a^{16}+\frac{2}{275}a^{15}-\frac{49}{6050}a^{14}-\frac{54}{3025}a^{13}+\frac{4}{275}a^{12}+\frac{1}{22}a^{11}-\frac{4}{55}a^{10}+\frac{829}{6050}a^{9}+\frac{149}{605}a^{8}-\frac{83}{275}a^{7}-\frac{331}{550}a^{6}+\frac{301}{275}a^{5}-\frac{173}{275}a^{4}-\frac{581}{550}a^{3}+\frac{23}{50}a^{2}+\frac{127}{50}a-\frac{57}{25}$, $\frac{23}{6050}a^{19}-\frac{3}{1210}a^{18}-\frac{1}{550}a^{17}+\frac{2}{275}a^{16}-\frac{4}{275}a^{15}-\frac{199}{6050}a^{14}+\frac{169}{6050}a^{13}+\frac{3}{275}a^{12}-\frac{3}{55}a^{11}+\frac{7}{55}a^{10}+\frac{3413}{6050}a^{9}-\frac{2619}{6050}a^{8}-\frac{7}{25}a^{7}+\frac{271}{275}a^{6}-\frac{57}{25}a^{5}-\frac{402}{275}a^{4}+\frac{453}{275}a^{3}-\frac{3}{10}a^{2}-\frac{37}{25}a+\frac{134}{25}$, $\frac{9}{3025}a^{18}-\frac{3}{550}a^{17}+\frac{1}{275}a^{16}+\frac{1}{275}a^{15}-\frac{86}{3025}a^{13}+\frac{27}{550}a^{12}-\frac{9}{275}a^{11}-\frac{13}{550}a^{10}+\frac{1358}{3025}a^{8}-\frac{461}{550}a^{7}+\frac{172}{275}a^{6}+\frac{259}{550}a^{5}-\frac{438}{275}a^{3}+\frac{68}{25}a^{2}-\frac{42}{25}a-\frac{49}{50}$
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| Regulator: | \( 1387068.91153 \) |
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Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{0}\cdot(2\pi)^{10}\cdot 1387068.91153 \cdot 1}{10\cdot\sqrt{1597098119556903839111328125}}\cr\approx \mathstrut & 0.33283648154 \end{aligned}\]
Galois group
$C_5^3:C_4$ (as 20T125):
| A solvable group of order 500 |
| The 38 conjugacy class representatives for $C_5^3:C_4$ |
| Character table for $C_5^3:C_4$ |
Intermediate fields
| \(\Q(\sqrt{5}) \), \(\Q(\zeta_{5})\) |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
| Degree 20 siblings: | data not computed |
| 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 | ${\href{/padicField/2.4.0.1}{4} }^{5}$ | ${\href{/padicField/3.4.0.1}{4} }^{5}$ | R | ${\href{/padicField/7.4.0.1}{4} }^{5}$ | R | ${\href{/padicField/13.4.0.1}{4} }^{5}$ | ${\href{/padicField/17.4.0.1}{4} }^{5}$ | ${\href{/padicField/19.10.0.1}{10} }^{2}$ | ${\href{/padicField/23.4.0.1}{4} }^{5}$ | ${\href{/padicField/29.10.0.1}{10} }^{2}$ | ${\href{/padicField/31.5.0.1}{5} }^{4}$ | ${\href{/padicField/37.4.0.1}{4} }^{5}$ | ${\href{/padicField/41.5.0.1}{5} }^{4}$ | ${\href{/padicField/43.4.0.1}{4} }^{5}$ | ${\href{/padicField/47.4.0.1}{4} }^{5}$ | ${\href{/padicField/53.4.0.1}{4} }^{5}$ | ${\href{/padicField/59.10.0.1}{10} }^{2}$ |
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 |
|---|---|---|---|---|---|---|---|
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\(5\)
| 5.1.20.27a1.4 | $x^{20} + 5 x^{9} + 15 x^{8} + 5$ | $20$ | $1$ | $27$ | 20T26 | not computed |
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\(11\)
| 11.1.5.4a1.1 | $x^{5} + 11$ | $5$ | $1$ | $4$ | $C_5$ | $$[\ ]_{5}$$ |
| 11.1.5.4a1.3 | $x^{5} + 44$ | $5$ | $1$ | $4$ | $C_5$ | $$[\ ]_{5}$$ | |
| 11.5.1.0a1.1 | $x^{5} + 10 x^{2} + 9$ | $1$ | $5$ | $0$ | $C_5$ | $$[\ ]^{5}$$ | |
| 11.5.1.0a1.1 | $x^{5} + 10 x^{2} + 9$ | $1$ | $5$ | $0$ | $C_5$ | $$[\ ]^{5}$$ |