Properties

Base field 6.6.434581.1
Label 6.6.434581.1-49.1-a2
Conductor \((7,a^{5} - 4 a^{4} + 11 a^{2} - 3 a - 4)\)
Conductor norm \( 49 \)
CM no
base-change no
Q-curve no
Torsion order \( 1 \)
Rank not available

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Base field 6.6.434581.1

Generator \(a\), with minimal polynomial \( x^{6} - 2 x^{5} - 4 x^{4} + 5 x^{3} + 4 x^{2} - 2 x - 1 \); class number \(1\).

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-1, -2, 4, 5, -4, -2, 1]);
sage: x = polygen(QQ); K.<a> = NumberField(x^6 - 2*x^5 - 4*x^4 + 5*x^3 + 4*x^2 - 2*x - 1)
gp (2.8): K = nfinit(a^6 - 2*a^5 - 4*a^4 + 5*a^3 + 4*a^2 - 2*a - 1);

Weierstrass equation

\( y^2 + \left(2 a^{5} - 5 a^{4} - 5 a^{3} + 11 a^{2} + 2 a - 2\right) x y + \left(2 a^{5} - 3 a^{4} - 8 a^{3} + 4 a^{2} + 4 a + 1\right) y = x^{3} + \left(-a^{5} + a^{4} + 4 a^{3} + a^{2} - 2 a - 1\right) x^{2} + \left(-5 a^{5} + 7 a^{4} + 20 a^{3} - 5 a^{2} - 13 a - 3\right) x - a^{5} + a^{4} + 6 a^{3} + a^{2} - 8 a - 3 \)
magma: E := ChangeRing(EllipticCurve([2*a^5 - 5*a^4 - 5*a^3 + 11*a^2 + 2*a - 2, -a^5 + a^4 + 4*a^3 + a^2 - 2*a - 1, 2*a^5 - 3*a^4 - 8*a^3 + 4*a^2 + 4*a + 1, -5*a^5 + 7*a^4 + 20*a^3 - 5*a^2 - 13*a - 3, -a^5 + a^4 + 6*a^3 + a^2 - 8*a - 3]),K);
sage: E = EllipticCurve(K, [2*a^5 - 5*a^4 - 5*a^3 + 11*a^2 + 2*a - 2, -a^5 + a^4 + 4*a^3 + a^2 - 2*a - 1, 2*a^5 - 3*a^4 - 8*a^3 + 4*a^2 + 4*a + 1, -5*a^5 + 7*a^4 + 20*a^3 - 5*a^2 - 13*a - 3, -a^5 + a^4 + 6*a^3 + a^2 - 8*a - 3])
gp (2.8): E = ellinit([2*a^5 - 5*a^4 - 5*a^3 + 11*a^2 + 2*a - 2, -a^5 + a^4 + 4*a^3 + a^2 - 2*a - 1, 2*a^5 - 3*a^4 - 8*a^3 + 4*a^2 + 4*a + 1, -5*a^5 + 7*a^4 + 20*a^3 - 5*a^2 - 13*a - 3, -a^5 + a^4 + 6*a^3 + a^2 - 8*a - 3],K)

This is a global minimal model.

sage: E.is_global_minimal_model()

Invariants

\(\mathfrak{N} \) = \((7,a^{5} - 4 a^{4} + 11 a^{2} - 3 a - 4)\) = \( \left(-a^{5} + 4 a^{4} - 11 a^{2} + 3 a + 4\right) \)
magma: Conductor(E);
sage: E.conductor()
\(N(\mathfrak{N}) \) = \( 49 \) = \( 49 \)
magma: Norm(Conductor(E));
sage: E.conductor().norm()
\(\mathfrak{D}\) = \((7,a^{4} - 2 a^{3} - 3 a^{2} + 3 a + 6,a^{5} - 3 a^{4} - 2 a^{3} + 8 a^{2} + 2,7 a,a^{5} - 2 a^{4} - 3 a^{3} + 3 a^{2} + 6 a,a^{5} - 2 a^{4} - 3 a^{3} + 4 a^{2} + 3 a - 1)\) = \( \left(-a^{5} + 4 a^{4} - 11 a^{2} + 3 a + 4\right) \)
magma: Discriminant(E);
sage: E.discriminant()
gp (2.8): E.disc
\(N(\mathfrak{D})\) = \( 49 \) = \( 49 \)
magma: Norm(Discriminant(E));
sage: E.discriminant().norm()
gp (2.8): norm(E.disc)
\(j\) = \( -\frac{33556156766}{7} a^{5} + 16674377390 a^{4} - \frac{38330968859}{7} a^{3} - \frac{111114623838}{7} a^{2} + \frac{30043261222}{7} a + \frac{22698372290}{7} \)
magma: jInvariant(E);
sage: E.j_invariant()
gp (2.8): E.j
\( \text{End} (E) \) = \(\Z\)   (no Complex Multiplication )
magma: HasComplexMultiplication(E);
sage: E.has_cm(), E.cm_discriminant()
\( \text{ST} (E) \) = $\mathrm{SU}(2)$

Mordell-Weil group

Rank not available.
magma: Rank(E);
sage: E.rank()
magma: Generators(E); // includes torsion
sage: E.gens()

Regulator: not available

magma: Regulator(Generators(E));
sage: E.regulator_of_points(E.gens())

Torsion subgroup

Structure: Trivial
magma: TorsionSubgroup(E);
sage: E.torsion_subgroup().gens()
gp (2.8): elltors(E)[2]
magma: Order(TorsionSubgroup(E));
sage: E.torsion_order()
gp (2.8): elltors(E)[1]

Local data at primes of bad reduction

magma: LocalInformation(E);
sage: E.local_data()
prime Norm Tamagawa number Kodaira symbol Reduction type Root number ord(\(\mathfrak{N}\)) ord(\(\mathfrak{D}\)) ord\((j)_{-}\)
\( \left(-a^{5} + 4 a^{4} - 11 a^{2} + 3 a + 4\right) \) \(49\) \(1\) \(I_{1}\) Split multiplicative \(-1\) \(1\) \(1\) \(1\)

Galois Representations

The mod \( p \) Galois Representation has maximal image for all primes \( p \) except those listed.

prime Image of Galois Representation
\(3\) 3B

Isogenies and isogeny class

This curve has non-trivial cyclic isogenies of degree \(d\) for \(d=\) 3.
Its isogeny class 49.1-a consists of curves linked by isogenies of degree3.

Base change

This curve is not the base-change of an elliptic curve defined over \(\Q\). It is not a \(\Q\)-curve.