Base field 3.3.316.1
Generator \(a\), with minimal polynomial \( x^{3} - x^{2} - 4 x + 2 \); class number \(1\).
sage: R.<x> = PolynomialRing(QQ); K.<a> = NumberField(R([2, -4, -1, 1]))
gp: K = nfinit(Polrev([2, -4, -1, 1]));
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![2, -4, -1, 1]);
Weierstrass equation
sage: E = EllipticCurve([K([1,1,0]),K([-3,0,1]),K([0,0,0]),K([-475582785736,-59243475580,111924466012]),K([-103576988297813195,-12902613301177606,24375985535984949])])
gp: E = ellinit([Polrev([1,1,0]),Polrev([-3,0,1]),Polrev([0,0,0]),Polrev([-475582785736,-59243475580,111924466012]),Polrev([-103576988297813195,-12902613301177606,24375985535984949])], K);
magma: E := EllipticCurve([K![1,1,0],K![-3,0,1],K![0,0,0],K![-475582785736,-59243475580,111924466012],K![-103576988297813195,-12902613301177606,24375985535984949]]);
This is a global minimal model.
sage: E.is_global_minimal_model()
Invariants
Conductor: | \((2a^2-3a-1)\) | = | \((-a+1)^{6}\) |
sage: E.conductor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
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Conductor norm: | \( 64 \) | = | \(2^{6}\) |
sage: E.conductor().norm()
gp: idealnorm(ellglobalred(E)[1])
magma: Norm(Conductor(E));
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Discriminant: | \((44a^2-263a-495)\) | = | \((-a+1)^{26}\) |
sage: E.discriminant()
gp: E.disc
magma: Discriminant(E);
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Discriminant norm: | \( 67108864 \) | = | \(2^{26}\) |
sage: E.discriminant().norm()
gp: norm(E.disc)
magma: Norm(Discriminant(E));
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j-invariant: | \( \frac{130050481}{256} a^{2} + \frac{87514925}{128} a - \frac{54929731}{128} \) | ||
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: | \(1\) | |
Generator | $\left(-202586 a^{2} + 107232 a + 860816 : 84908422 a^{2} - 44943435 a - 360787817 : 1\right)$ | |
Height | \(1.6205282546862295791674776770702149720\) | |
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);
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Torsion generators: | $\left(\frac{497155}{4} a^{2} - \frac{131577}{2} a - \frac{2112485}{4} : -\frac{182789}{2} a^{2} + \frac{387019}{8} a + \frac{3106795}{8} : 1\right)$ | $\left(58622 a^{2} - 31030 a - 249094 : -43107 a^{2} + 22818 a + 183169 : 1\right)$ |
sage: T.gens()
gp: T[3]
magma: [piT(P) : P in Generators(T)];
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BSD invariants
Analytic rank: | \( 1 \) | ||
sage: E.rank()
magma: Rank(E);
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Mordell-Weil rank: | \(1\) | ||
Regulator: | \( 1.6205282546862295791674776770702149720 \) | ||
Period: | \( 37.529307628085786271810561076614371913 \) | ||
Tamagawa product: | \( 4 \) | ||
Torsion order: | \(4\) | ||
Leading coefficient: | \( 2.5659304579191107995173056971277748399 \) | ||
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\((j)_{-}\) |
---|---|---|---|---|---|---|---|---|
\((-a+1)\) | \(2\) | \(4\) | \(I_{16}^{*}\) | Additive | \(1\) | \(6\) | \(26\) | \(8\) |
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, 4 and 8.
Its isogeny class
64.7-d
consists of curves linked by isogenies of
degrees dividing 16.
Base change
This elliptic curve is not a \(\Q\)-curve.
It is not the base change of an elliptic curve defined over any subfield.