# Properties

 Label 19.1.10157528488...7431.1 Degree $19$ Signature $[1, 9]$ Discriminant $-\,3^{9}\cdot 557^{9}$ Root discriminant $33.63$ Ramified primes $3, 557$ Class number $1$ (GRH) Class group Trivial (GRH) Galois Group $D_{19}$ (as 19T2)

# Related objects

Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-1053, 2673, -2790, 2592, -3748, 6893, -9440, 8854, -5070, 888, 1220, -1180, 481, -80, 3, 3, -10, 11, -5, 1]);
sage: x = polygen(QQ); K.<a> = NumberField(x^19 - 5*x^18 + 11*x^17 - 10*x^16 + 3*x^15 + 3*x^14 - 80*x^13 + 481*x^12 - 1180*x^11 + 1220*x^10 + 888*x^9 - 5070*x^8 + 8854*x^7 - 9440*x^6 + 6893*x^5 - 3748*x^4 + 2592*x^3 - 2790*x^2 + 2673*x - 1053)
gp: K = bnfinit(x^19 - 5*x^18 + 11*x^17 - 10*x^16 + 3*x^15 + 3*x^14 - 80*x^13 + 481*x^12 - 1180*x^11 + 1220*x^10 + 888*x^9 - 5070*x^8 + 8854*x^7 - 9440*x^6 + 6893*x^5 - 3748*x^4 + 2592*x^3 - 2790*x^2 + 2673*x - 1053, 1)

## Normalizeddefining polynomial

$$x^{19}$$ $$\mathstrut -\mathstrut 5 x^{18}$$ $$\mathstrut +\mathstrut 11 x^{17}$$ $$\mathstrut -\mathstrut 10 x^{16}$$ $$\mathstrut +\mathstrut 3 x^{15}$$ $$\mathstrut +\mathstrut 3 x^{14}$$ $$\mathstrut -\mathstrut 80 x^{13}$$ $$\mathstrut +\mathstrut 481 x^{12}$$ $$\mathstrut -\mathstrut 1180 x^{11}$$ $$\mathstrut +\mathstrut 1220 x^{10}$$ $$\mathstrut +\mathstrut 888 x^{9}$$ $$\mathstrut -\mathstrut 5070 x^{8}$$ $$\mathstrut +\mathstrut 8854 x^{7}$$ $$\mathstrut -\mathstrut 9440 x^{6}$$ $$\mathstrut +\mathstrut 6893 x^{5}$$ $$\mathstrut -\mathstrut 3748 x^{4}$$ $$\mathstrut +\mathstrut 2592 x^{3}$$ $$\mathstrut -\mathstrut 2790 x^{2}$$ $$\mathstrut +\mathstrut 2673 x$$ $$\mathstrut -\mathstrut 1053$$

magma: DefiningPolynomial(K);
sage: K.defining_polynomial()
gp: K.pol

## Invariants

 Degree: $19$ magma: Degree(K); sage: K.degree() gp: poldegree(K.pol) Signature: $[1, 9]$ magma: Signature(K); sage: K.signature() gp: K.sign Discriminant: $$-101575284882268140616515967431=-\,3^{9}\cdot 557^{9}$$ magma: Discriminant(K); sage: K.disc() gp: K.disc Root discriminant: $33.63$ magma: Abs(Discriminant(K))^(1/Degree(K)); sage: (K.disc().abs())^(1./K.degree()) gp: abs(K.disc)^(1/poldegree(K.pol)) Ramified primes: $3, 557$ magma: PrimeDivisors(Discriminant(K)); sage: K.disc().support() gp: factor(abs(K.disc))[,1]~ This field is not Galois over $\Q$. This is not a CM field.

## Integral basis (with respect to field generator $$a$$)

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $\frac{1}{3} a^{5} + \frac{1}{3} a^{3} + \frac{1}{3} a$, $\frac{1}{3} a^{6} + \frac{1}{3} a^{4} + \frac{1}{3} a^{2}$, $\frac{1}{3} a^{7} - \frac{1}{3} a$, $\frac{1}{9} a^{8} + \frac{1}{3} a^{4} - \frac{4}{9} a^{2}$, $\frac{1}{9} a^{9} + \frac{2}{9} a^{3} - \frac{1}{3} a$, $\frac{1}{9} a^{10} + \frac{2}{9} a^{4} - \frac{1}{3} a^{2}$, $\frac{1}{27} a^{11} - \frac{1}{27} a^{9} + \frac{1}{9} a^{7} + \frac{2}{27} a^{5} + \frac{1}{3} a^{4} + \frac{4}{27} a^{3} - \frac{1}{3} a^{2} - \frac{1}{3} a$, $\frac{1}{27} a^{12} - \frac{1}{27} a^{10} + \frac{2}{27} a^{6} - \frac{5}{27} a^{4} + \frac{1}{3} a^{3} + \frac{1}{9} a^{2} - \frac{1}{3} a$, $\frac{1}{81} a^{13} + \frac{1}{81} a^{11} + \frac{1}{27} a^{10} - \frac{2}{81} a^{9} - \frac{1}{27} a^{8} + \frac{8}{81} a^{7} - \frac{1}{9} a^{6} - \frac{1}{81} a^{5} - \frac{4}{27} a^{4} + \frac{11}{81} a^{3} + \frac{7}{27} a^{2} + \frac{1}{9} a - \frac{1}{3}$, $\frac{1}{81} a^{14} + \frac{1}{81} a^{12} - \frac{2}{81} a^{10} - \frac{1}{81} a^{8} + \frac{1}{9} a^{7} - \frac{1}{81} a^{6} + \frac{1}{9} a^{5} + \frac{38}{81} a^{4} + \frac{4}{9} a^{3} - \frac{1}{9} a^{2}$, $\frac{1}{243} a^{15} + \frac{1}{243} a^{14} + \frac{1}{243} a^{13} + \frac{1}{243} a^{12} - \frac{2}{243} a^{11} - \frac{2}{243} a^{10} - \frac{10}{243} a^{9} + \frac{8}{243} a^{8} + \frac{35}{243} a^{7} + \frac{35}{243} a^{6} - \frac{34}{243} a^{5} - \frac{61}{243} a^{4} - \frac{8}{27} a^{3} + \frac{11}{27} a^{2} - \frac{1}{3}$, $\frac{1}{3159} a^{16} - \frac{2}{3159} a^{15} + \frac{16}{3159} a^{14} + \frac{10}{3159} a^{13} + \frac{1}{243} a^{12} + \frac{43}{3159} a^{11} + \frac{158}{3159} a^{10} - \frac{67}{3159} a^{9} - \frac{70}{3159} a^{8} - \frac{298}{3159} a^{7} + \frac{302}{3159} a^{6} + \frac{245}{3159} a^{5} + \frac{406}{1053} a^{4} + \frac{203}{1053} a^{3} + \frac{25}{351} a^{2} + \frac{10}{117} a - \frac{1}{3}$, $\frac{1}{161109} a^{17} + \frac{16}{161109} a^{16} - \frac{37}{53703} a^{15} - \frac{61}{53703} a^{14} - \frac{161}{53703} a^{13} - \frac{653}{53703} a^{12} - \frac{290}{161109} a^{11} - \frac{122}{161109} a^{10} + \frac{424}{53703} a^{9} + \frac{2878}{53703} a^{8} - \frac{331}{53703} a^{7} + \frac{34}{243} a^{6} - \frac{9530}{161109} a^{5} + \frac{70828}{161109} a^{4} + \frac{4753}{17901} a^{3} + \frac{3028}{17901} a^{2} - \frac{11}{117} a + \frac{52}{153}$, $\frac{1}{1302244047} a^{18} + \frac{428}{144693783} a^{17} - \frac{80209}{1302244047} a^{16} + \frac{793007}{434081349} a^{15} + \frac{1936471}{434081349} a^{14} - \frac{63280}{33390873} a^{13} + \frac{313963}{100172619} a^{12} - \frac{7269046}{434081349} a^{11} - \frac{67681507}{1302244047} a^{10} - \frac{23466806}{434081349} a^{9} + \frac{18566036}{434081349} a^{8} + \frac{1014310}{33390873} a^{7} - \frac{24995450}{1302244047} a^{6} - \frac{59695478}{434081349} a^{5} + \frac{630458807}{1302244047} a^{4} + \frac{2484602}{5359029} a^{3} - \frac{51382954}{144693783} a^{2} - \frac{6634339}{16077087} a + \frac{520313}{1236699}$

magma: IntegralBasis(K);
sage: K.integral_basis()
gp: K.zk

## Class group and class number

Trivial group, which has order $1$ (assuming GRH)

magma: ClassGroup(K);
sage: K.class_group().invariants()
gp: K.clgp

## Unit group

magma: UK, f := UnitGroup(K);
sage: UK = K.unit_group()
 Rank: $9$ magma: UnitRank(K); sage: UK.rank() gp: K.fu Torsion generator: $$-1$$ (order $2$) magma: K!f(TU.1) where TU,f is TorsionUnitGroup(K); sage: UK.torsion_generator() gp: K.tu[2] Fundamental units: Units are too long to display, but can be downloaded with other data for this field from 'Stored data to gp' link to the right (assuming GRH) magma: [K!f(g): g in Generators(UK)]; sage: UK.fundamental_units() gp: K.fu Regulator: $$191261859.157$$ (assuming GRH) magma: Regulator(K); sage: K.regulator() gp: K.reg

## Galois group

$D_{19}$ (as 19T2):

magma: GaloisGroup(K);
sage: K.galois_group(type='pari')
gp: polgalois(K.pol)
 A solvable group of order 38 The 11 conjugacy class representatives for $D_{19}$ Character table for $D_{19}$

## Intermediate fields

 The extension is primitive: there are no intermediate fields between this field and $\Q$.

## Sibling fields

 Galois closure: data not computed

## Frobenius cycle types

 $p$ Cycle type 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 $19$ R $19$ $19$ $19$ ${\href{/LocalNumberField/13.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/13.1.0.1}{1} }$ ${\href{/LocalNumberField/17.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/17.1.0.1}{1} }$ $19$ $19$ ${\href{/LocalNumberField/29.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/29.1.0.1}{1} }$ ${\href{/LocalNumberField/31.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/31.1.0.1}{1} }$ ${\href{/LocalNumberField/37.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/37.1.0.1}{1} }$ $19$ $19$ $19$ $19$ ${\href{/LocalNumberField/59.2.0.1}{2} }^{9}{,}\,{\href{/LocalNumberField/59.1.0.1}{1} }$

In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.

magma: p := 7; // to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
magma: idealfactors := Factorization(p*Integers(K)); // get the data
magma: [<primefactor[2], Valuation(Norm(primefactor[1]), p)> : primefactor in idealfactors];
sage: p = 7; # to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
sage: [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
gp: p = 7; \\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
gp: idealfactors = idealprimedec(K, p); \\ get the data
gp: vector(length(idealfactors), j, [idealfactors[j][3], idealfactors[j][4]])

## Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
$3$$\Q_{3}$$x + 1$$1$$1$$0Trivial[\ ] 3.2.1.1x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2}$
3.2.1.1$x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2} 3.2.1.1x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2}$
3.2.1.1$x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2} 3.2.1.1x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2}$
3.2.1.1$x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2} 3.2.1.1x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2}$
3.2.1.1$x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2} 3.2.1.1x^{2} - 3$$2$$1$$1$$C_2$$[\ ]_{2}$
557Data not computed