Minimal equation
Minimal equation
Simplified equation
$y^2 + (x^3 + 1)y = -2x^4 + 4x^2 - 9x - 14$ | (homogenize, simplify) |
$y^2 + (x^3 + z^3)y = -2x^4z^2 + 4x^2z^4 - 9xz^5 - 14z^6$ | (dehomogenize, simplify) |
$y^2 = x^6 - 8x^4 + 2x^3 + 16x^2 - 36x - 55$ | (homogenize, minimize) |
Invariants
Conductor: | \( N \) | \(=\) | \(294\) | \(=\) | \( 2 \cdot 3 \cdot 7^{2} \) | magma: Conductor(LSeries(C)); Factorization($1);
|
Discriminant: | \( \Delta \) | \(=\) | \(8232\) | \(=\) | \( 2^{3} \cdot 3 \cdot 7^{3} \) | magma: Discriminant(C); Factorization(Integers()!$1);
|
Igusa-Clebsch invariants
Igusa invariants
G2 invariants
\( I_2 \) | \(=\) | \(7636\) | \(=\) | \( 2^{2} \cdot 23 \cdot 83 \) |
\( I_4 \) | \(=\) | \(11785\) | \(=\) | \( 5 \cdot 2357 \) |
\( I_6 \) | \(=\) | \(29745701\) | \(=\) | \( 239 \cdot 124459 \) |
\( I_{10} \) | \(=\) | \(1053696\) | \(=\) | \( 2^{10} \cdot 3 \cdot 7^{3} \) |
\( J_2 \) | \(=\) | \(1909\) | \(=\) | \( 23 \cdot 83 \) |
\( J_4 \) | \(=\) | \(151354\) | \(=\) | \( 2 \cdot 7 \cdot 19 \cdot 569 \) |
\( J_6 \) | \(=\) | \(15951264\) | \(=\) | \( 2^{5} \cdot 3 \cdot 7^{2} \cdot 3391 \) |
\( J_8 \) | \(=\) | \(1885732415\) | \(=\) | \( 5 \cdot 7^{2} \cdot 7696867 \) |
\( J_{10} \) | \(=\) | \(8232\) | \(=\) | \( 2^{3} \cdot 3 \cdot 7^{3} \) |
\( g_1 \) | \(=\) | \(25353016669288549/8232\) | ||
\( g_2 \) | \(=\) | \(75211396489919/588\) | ||
\( g_3 \) | \(=\) | \(49431027484/7\) |
Automorphism group
\(\mathrm{Aut}(X)\) | \(\simeq\) | $C_2^2$ | magma: AutomorphismGroup(C); IdentifyGroup($1);
|
\(\mathrm{Aut}(X_{\overline{\Q}})\) | \(\simeq\) | $C_2^2$ | magma: AutomorphismGroup(ChangeRing(C,AlgebraicClosure(Rationals()))); IdentifyGroup($1);
|
Rational points
Number of rational Weierstrass points: \(0\)
This curve is locally solvable everywhere.
Mordell-Weil group of the Jacobian
Group structure: \(\Z/{12}\Z\)
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3\) | \(0\) | \(12\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3\) | \(0\) | \(12\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 1 : 0)\) | \(z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-x^3 + z^3\) | \(0\) | \(12\) |
2-torsion field: 8.0.12446784.1
BSD invariants
Hasse-Weil conjecture: | verified |
Analytic rank: | \(0\) |
Mordell-Weil rank: | \(0\) |
2-Selmer rank: | \(1\) |
Regulator: | \( 1 \) |
Real period: | \( 7.150511 \) |
Tamagawa product: | \( 3 \) |
Torsion order: | \( 12 \) |
Leading coefficient: | \( 0.148968 \) |
Analytic order of Ш: | \( 1 \) (rounded) |
Order of Ш: | square |
Local invariants
Prime | ord(\(N\)) | ord(\(\Delta\)) | Tamagawa | L-factor | Cluster picture |
---|---|---|---|---|---|
\(2\) | \(1\) | \(3\) | \(1\) | \(( 1 + T )( 1 + T + 2 T^{2} )\) | |
\(3\) | \(1\) | \(1\) | \(1\) | \(( 1 - T )( 1 + 2 T + 3 T^{2} )\) | |
\(7\) | \(2\) | \(3\) | \(3\) | \(( 1 - T )( 1 + T )\) |
Galois representations
For primes $\ell \ge 5$ the Galois representation data has not been computed for this curve since it is not generic.
For primes $\ell \le 3$, the image of the mod-$\ell$ Galois representation is listed in the table below, whenever it is not all of $\GSp(4,\F_\ell)$.
Prime \(\ell\) | mod-\(\ell\) image | Is torsion prime? |
---|---|---|
\(2\) | 2.45.1 | yes |
\(3\) | 3.2160.20 | yes |
Sato-Tate group
\(\mathrm{ST}\) | \(\simeq\) | $\mathrm{SU}(2)\times\mathrm{SU}(2)$ |
\(\mathrm{ST}^0\) | \(\simeq\) | \(\mathrm{SU}(2)\times\mathrm{SU}(2)\) |
Decomposition of the Jacobian
Splits over \(\Q\)
Decomposes up to isogeny as the product of the non-isogenous elliptic curve isogeny classes:
Elliptic curve isogeny class 14.a
Elliptic curve isogeny class 21.a
Endomorphisms of the Jacobian
Of \(\GL_2\)-type over \(\Q\)
Endomorphism ring over \(\Q\):
\(\End (J_{})\) | \(\simeq\) | an order of index \(2\) in \(\Z \times \Z\) |
\(\End (J_{}) \otimes \Q \) | \(\simeq\) | \(\Q\) \(\times\) \(\Q\) |
\(\End (J_{}) \otimes \R\) | \(\simeq\) | \(\R \times \R\) |
All \(\overline{\Q}\)-endomorphisms of the Jacobian are defined over \(\Q\).