Properties

Label 2.0.8.1-32400.3-g3
Base field \(\Q(\sqrt{-2}) \)
Conductor \((180)\)
Conductor norm \( 32400 \)
CM no
Base change yes: 720.j2,2880.a2
Q-curve yes
Torsion order \( 4 \)
Rank \( 0 \)

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Base field \(\Q(\sqrt{-2}) \)

Generator \(a\), with minimal polynomial \( x^{2} + 2 \); class number \(1\).

sage: x = polygen(QQ); K.<a> = NumberField(x^2 + 2)
 
gp: K = nfinit(a^2 + 2);
 
magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![2, 0, 1]);
 

Weierstrass equation

\(y^2+axy=x^{3}-x^{2}-16326x+117450\)
sage: E = EllipticCurve(K, [a, -1, 0, -16326, 117450])
 
gp: E = ellinit([a, -1, 0, -16326, 117450],K)
 
magma: E := ChangeRing(EllipticCurve([a, -1, 0, -16326, 117450]),K);
 

This is a global minimal model.

sage: E.is_global_minimal_model()
 

Invariants

Conductor: \((180)\) = \( \left(a\right)^{4} \cdot \left(-a - 1\right)^{2} \cdot \left(a - 1\right)^{2} \cdot \left(5\right) \)
sage: E.conductor()
 
magma: Conductor(E);
 
Conductor norm: \( 32400 \) = \( 2^{4} \cdot 3^{4} \cdot 25 \)
sage: E.conductor().norm()
 
magma: Norm(Conductor(E));
 
Discriminant: \((273375000000000)\) = \( \left(a\right)^{18} \cdot \left(-a - 1\right)^{7} \cdot \left(a - 1\right)^{7} \cdot \left(5\right)^{12} \)
sage: E.discriminant()
 
gp: E.disc
 
magma: Discriminant(E);
 
Discriminant norm: \( 74733890625000000000000000000 \) = \( 2^{18} \cdot 3^{14} \cdot 25^{12} \)
sage: E.discriminant().norm()
 
gp: norm(E.disc)
 
magma: Norm(Discriminant(E));
 
j-invariant: \( \frac{10316097499609}{5859375000} \)
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: \(0\)
Torsion structure: \(\Z/4\Z\)
sage: T = E.torsion_subgroup(); T.invariants()
 
gp: T = elltors(E); T[2]
 
magma: T,piT := TorsionSubgroup(E); Invariants(T);
 
Torsion generator: $\left(57 : -591 a : 1\right)$
sage: T.gens()
 
gp: T[3]
 
magma: [piT(P) : P in Generators(T)];
 

BSD invariants

Analytic rank: \( 0 \)
sage: E.rank()
 
magma: Rank(E);
 
Mordell-Weil rank: \(0\)
Regulator: \( 1 \)
Period: \( 0.0539287558477544 \)
Tamagawa product: \( 768 \)  =  \(2^{2}\cdot2^{2}\cdot2^{2}\cdot( 2^{2} \cdot 3 )\)
Torsion order: \(4\)
Leading coefficient: \(1.83040267012324\)
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\((j)_{-}\)
\( \left(a\right) \) \(2\) \(4\) \(I_{10}^*\) Additive \(1\) \(4\) \(18\) \(6\)
\( \left(-a - 1\right) \) \(3\) \(4\) \(I_{1}^*\) Additive \(-1\) \(2\) \(7\) \(1\)
\( \left(a - 1\right) \) \(3\) \(4\) \(I_{1}^*\) Additive \(-1\) \(2\) \(7\) \(1\)
\( \left(5\right) \) \(25\) \(12\) \(I_{12}\) Split multiplicative \(-1\) \(1\) \(12\) \(12\)

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

Isogenies and isogeny class

This curve has non-trivial cyclic isogenies of degree \(d\) for \(d=\) 2, 3, 4, 6 and 12.
Its isogeny class 32400.3-g consists of curves linked by isogenies of degrees dividing 12.

Base change

This curve is the base change of elliptic curves 720.j2, 2880.a2, defined over \(\Q\), so it is also a \(\Q\)-curve.