Base field 4.4.18625.1
Generator \(a\), with minimal polynomial \( x^{4} - x^{3} - 14 x^{2} + 9 x + 41 \); class number \(1\).
sage: R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([41, 9, -14, -1, 1]))
gp: K = nfinit(Polrev([41, 9, -14, -1, 1]));
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![41, 9, -14, -1, 1]);
Weierstrass equation
sage: E = EllipticCurve([K([1,0,0,0]),K([7,1,-1,0]),K([1,0,0,0]),K([-908,-552,81,53]),K([-11443,-7158,1011,690])])
gp: E = ellinit([Polrev([1,0,0,0]),Polrev([7,1,-1,0]),Polrev([1,0,0,0]),Polrev([-908,-552,81,53]),Polrev([-11443,-7158,1011,690])], K);
magma: E := EllipticCurve([K![1,0,0,0],K![7,1,-1,0],K![1,0,0,0],K![-908,-552,81,53],K![-11443,-7158,1011,690]]);
This is a global minimal model.
sage: E.is_global_minimal_model()
Invariants
| Conductor: | \((1/2a^3+a^2-5a-21/2)\) | = | \((1/2a^3+a^2-5a-21/2)\) |
sage: E.conductor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
| |||
| Conductor norm: | \( 5 \) | = | \(5\) |
sage: E.conductor().norm()
gp: idealnorm(ellglobalred(E)[1])
magma: Norm(Conductor(E));
| |||
| Discriminant: | \((1/3a^3-8/3a-2/3)\) | = | \((1/2a^3+a^2-5a-21/2)^{2}\) |
sage: E.discriminant()
gp: E.disc
magma: Discriminant(E);
| |||
| Discriminant norm: | \( 25 \) | = | \(5^{2}\) |
sage: E.discriminant().norm()
gp: norm(E.disc)
magma: Norm(Discriminant(E));
| |||
| j-invariant: | \( \frac{540473}{5} a^{3} + \frac{1220538}{5} a^{2} - \frac{3552673}{5} a - \frac{6688053}{5} \) | ||
sage: E.j_invariant()
gp: E.j
magma: jInvariant(E);
| |||
| Endomorphism ring: | \(\Z\) | ||
| Geometric endomorphism ring: | \(\Z\) | (no potential complex multiplication) | |
sage: E.has_cm(), E.cm_discriminant()
magma: HasComplexMultiplication(E);
| |||
| Sato-Tate group: | $\mathrm{SU}(2)$ | ||
Mordell-Weil group
| Rank: | \(1\) | |
| Generator | $\left(-17 a^{3} - 25 a^{2} + 176 a + 284 : -\frac{875}{3} a^{3} - 428 a^{2} + \frac{9079}{3} a + \frac{14524}{3} : 1\right)$ | |
| Height | \(0.57768645107962011198383452552595973651\) | |
| Torsion structure: | \(\Z/2\Z\oplus\Z/2\Z\) | |
| sage: T = E.torsion_subgroup(); T.invariants()
gp: T = elltors(E); T[2]
magma: T,piT := TorsionSubgroup(E); Invariants(T);
| ||
| Torsion generators: | $\left(\frac{5}{4} a^{3} + \frac{7}{4} a^{2} - \frac{53}{4} a - 19 : -\frac{5}{8} a^{3} - \frac{7}{8} a^{2} + \frac{53}{8} a + 9 : 1\right)$ | $\left(\frac{2}{3} a^{3} + 2 a^{2} - \frac{22}{3} a - \frac{61}{3} : -\frac{1}{3} a^{3} - a^{2} + \frac{11}{3} a + \frac{29}{3} : 1\right)$ |
| sage: T.gens()
gp: T[3]
magma: [piT(P) : P in Generators(T)];
| ||
BSD invariants
| Analytic rank: | \( 1 \) | ||
|
sage: E.rank()
magma: Rank(E);
|
|||
| Mordell-Weil rank: | \(1\) | ||
| Regulator: | \( 0.57768645107962011198383452552595973651 \) | ||
| Period: | \( 1058.5746171592916380727413433323562722 \) | ||
| Tamagawa product: | \( 2 \) | ||
| Torsion order: | \(4\) | ||
| Leading coefficient: | \( 2.24045136886674 \) | ||
| Analytic order of Ш: | \( 1 \) (rounded) | ||
Local data at primes of bad reduction
sage: E.local_data()
magma: LocalInformation(E);
| prime | Norm | Tamagawa number | Kodaira symbol | Reduction type | Root number | ord(\(\mathfrak{N}\)) | ord(\(\mathfrak{D}\)) | ord\((j)_{-}\) |
|---|---|---|---|---|---|---|---|---|
| \((1/2a^3+a^2-5a-21/2)\) | \(5\) | \(2\) | \(I_{2}\) | Split multiplicative | \(-1\) | \(1\) | \(2\) | \(2\) |
Galois Representations
The mod \( p \) Galois Representation has maximal image for all primes \( p < 1000 \) except those listed.
| prime | Image of Galois Representation |
|---|---|
| \(2\) | 2Cs |
Isogenies and isogeny class
This curve has non-trivial cyclic isogenies of degree \(d\) for \(d=\)
2 and 4.
Its isogeny class
5.1-d
consists of curves linked by isogenies of
degrees dividing 8.
Base change
This elliptic curve is not a \(\Q\)-curve.
It is not the base change of an elliptic curve defined over any subfield.