Base field \(\Q(\sqrt{57}) \)
Generator \(a\), with minimal polynomial \( x^{2} - x - 14 \); class number \(1\).
sage: R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([-14, -1, 1]))
gp: K = nfinit(Polrev([-14, -1, 1]));
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-14, -1, 1]);
Weierstrass equation
sage: E = EllipticCurve([K([1,0]),K([-1,1]),K([1,1]),K([8374872,2557279]),K([123630797521,37750816060])])
gp: E = ellinit([Polrev([1,0]),Polrev([-1,1]),Polrev([1,1]),Polrev([8374872,2557279]),Polrev([123630797521,37750816060])], K);
magma: E := EllipticCurve([K![1,0],K![-1,1],K![1,1],K![8374872,2557279],K![123630797521,37750816060]]);
This is a global minimal model.
sage: E.is_global_minimal_model()
Invariants
Conductor: | \((14)\) | = | \((a-4)\cdot(a+3)\cdot(2a+7)\cdot(-2a+9)\) |
sage: E.conductor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
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Conductor norm: | \( 196 \) | = | \(2\cdot2\cdot7\cdot7\) |
sage: E.conductor().norm()
gp: idealnorm(ellglobalred(E)[1])
magma: Norm(Conductor(E));
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Discriminant: | \((-574873185288192a-1816101017092096)\) | = | \((a-4)^{27}\cdot(a+3)^{54}\cdot(2a+7)^{4}\cdot(-2a+9)^{2}\) |
sage: E.discriminant()
gp: E.disc
magma: Discriminant(E);
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Discriminant norm: | \( -284457827503683015550013800448 \) | = | \(-2^{27}\cdot2^{54}\cdot7^{4}\cdot7^{2}\) |
sage: E.discriminant().norm()
gp: norm(E.disc)
magma: Norm(Discriminant(E));
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j-invariant: | \( -\frac{122334963786919556603939}{43252570821266243584} a + \frac{261970144644601191214497}{21626285410633121792} \) | ||
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: | \(\Z/6\Z\) |
sage: T = E.torsion_subgroup(); T.invariants()
gp: T = elltors(E); T[2]
magma: T,piT := TorsionSubgroup(E); Invariants(T);
| |
Torsion generator: | $\left(1891 a + 6193 : 245838 a + 805095 : 1\right)$ |
sage: T.gens()
gp: T[3]
magma: [piT(P) : P in Generators(T)];
|
BSD invariants
Analytic rank: | \( 0 \) | ||
sage: E.rank()
magma: Rank(E);
|
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Mordell-Weil rank: | \(0\) | ||
Regulator: | \( 1 \) | ||
Period: | \( 0.20297378603648142845458067365606409759 \) | ||
Tamagawa product: | \( 11664 \) = \(3^{3}\cdot( 2 \cdot 3^{3} )\cdot2^{2}\cdot2\) | ||
Torsion order: | \(6\) | ||
Leading coefficient: | \( 8.7105892506186585556463285890463989835 \) | ||
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\((j)_{-}\) |
---|---|---|---|---|---|---|---|---|
\((a-4)\) | \(2\) | \(27\) | \(I_{27}\) | Split multiplicative | \(-1\) | \(1\) | \(27\) | \(27\) |
\((a+3)\) | \(2\) | \(54\) | \(I_{54}\) | Split multiplicative | \(-1\) | \(1\) | \(54\) | \(54\) |
\((2a+7)\) | \(7\) | \(4\) | \(I_{4}\) | Split multiplicative | \(-1\) | \(1\) | \(4\) | \(4\) |
\((-2a+9)\) | \(7\) | \(2\) | \(I_{2}\) | 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 |
---|---|
\(2\) | 2B |
\(3\) | 3B.1.1 |
Isogenies and isogeny class
This curve has non-trivial cyclic isogenies of degree \(d\) for \(d=\)
2, 3, 6, 9 and 18.
Its isogeny class
196.1-a
consists of curves linked by isogenies of
degrees dividing 18.
Base change
This elliptic curve is a \(\Q\)-curve.
It is not the base change of an elliptic curve defined over any subfield.