Base field \(\Q(\sqrt{5}, \sqrt{7})\)
Generator \(a\), with minimal polynomial \( x^{4} - 2 x^{3} - 15 x^{2} + 16 x + 29 \); class number \(1\).
sage: R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([29, 16, -15, -2, 1]))
gp: K = nfinit(Polrev([29, 16, -15, -2, 1]));
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![29, 16, -15, -2, 1]);
Weierstrass equation
sage: E = EllipticCurve([K([0,0,0,0]),K([0,0,0,0]),K([-22/23,43/23,3/23,-2/23]),K([-1865/23,-2064/23,-144/23,96/23]),K([853,946,66,-44])])
gp: E = ellinit([Polrev([0,0,0,0]),Polrev([0,0,0,0]),Polrev([-22/23,43/23,3/23,-2/23]),Polrev([-1865/23,-2064/23,-144/23,96/23]),Polrev([853,946,66,-44])], K);
magma: E := EllipticCurve([K![0,0,0,0],K![0,0,0,0],K![-22/23,43/23,3/23,-2/23],K![-1865/23,-2064/23,-144/23,96/23],K![853,946,66,-44]]);
This is a global minimal model.
sage: E.is_global_minimal_model()
Invariants
Conductor: | \((4/23a^3-6/23a^2-40/23a+21/23)\) | = | \((4/23a^3-6/23a^2-40/23a+21/23)\) |
sage: E.conductor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
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Conductor norm: | \( 25 \) | = | \(25\) |
sage: E.conductor().norm()
gp: idealnorm(ellglobalred(E)[1])
magma: Norm(Conductor(E));
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Discriminant: | \((-125)\) | = | \((4/23a^3-6/23a^2-40/23a+21/23)^{6}\) |
sage: E.discriminant()
gp: E.disc
magma: Discriminant(E);
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Discriminant norm: | \( 244140625 \) | = | \(25^{6}\) |
sage: E.discriminant().norm()
gp: norm(E.disc)
magma: Norm(Discriminant(E));
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j-invariant: | \( -\frac{110592}{125} \) | ||
sage: E.j_invariant()
gp: E.j
magma: jInvariant(E);
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Endomorphism ring: | \(\Z\) | ||
Geometric endomorphism ring: | \(\Z\) | (no potential complex multiplication) | |
sage: E.has_cm(), E.cm_discriminant()
magma: HasComplexMultiplication(E);
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Sato-Tate group: | $\mathrm{SU}(2)$ |
Mordell-Weil group
Rank: | \(0\) |
Torsion structure: | trivial |
sage: T = E.torsion_subgroup(); T.invariants()
gp: T = elltors(E); T[2]
magma: T,piT := TorsionSubgroup(E); Invariants(T);
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BSD invariants
Analytic rank: | \( 0 \) | ||
sage: E.rank()
magma: Rank(E);
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Mordell-Weil rank: | \(0\) | ||
Regulator: | \( 1 \) | ||
Period: | \( 148.30156367778230507597189046333948622 \) | ||
Tamagawa product: | \( 2 \) | ||
Torsion order: | \(1\) | ||
Leading coefficient: | \( 2.11859376682546 \) | ||
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\((j)_{-}\) |
---|---|---|---|---|---|---|---|---|
\((4/23a^3-6/23a^2-40/23a+21/23)\) | \(25\) | \(2\) | \(I_{6}\) | Non-split multiplicative | \(1\) | \(1\) | \(6\) | \(6\) |
Galois Representations
The mod \( p \) Galois Representation has maximal image for all primes \( p < 1000 \) except those listed.
prime | Image of Galois Representation |
---|---|
\(3\) | 3Nn |
Isogenies and isogeny class
This curve has no rational isogenies. Its isogeny class 25.1-d consists of this curve only.
Base change
This elliptic curve is a \(\Q\)-curve. It is the base change of the following 2 elliptic curves:
Base field | Curve |
---|---|
\(\Q(\sqrt{7}) \) | 2.2.28.1-25.1-b1 |
\(\Q(\sqrt{7}) \) | 2.2.28.1-625.1-b1 |