Minimal equation
Minimal equation
Simplified equation
$y^2 + x^2y = x^5 + 12x^4 - 2x^3 - 253x^2 + 288x - 83$ | (homogenize, simplify) |
$y^2 + x^2zy = x^5z + 12x^4z^2 - 2x^3z^3 - 253x^2z^4 + 288xz^5 - 83z^6$ | (dehomogenize, simplify) |
$y^2 = 4x^5 + 49x^4 - 8x^3 - 1012x^2 + 1152x - 332$ | (homogenize, minimize) |
sage: R.<x> = PolynomialRing(QQ); C = HyperellipticCurve(R([-83, 288, -253, -2, 12, 1]), R([0, 0, 1]));
magma: R<x> := PolynomialRing(Rationals()); C := HyperellipticCurve(R![-83, 288, -253, -2, 12, 1], R![0, 0, 1]);
sage: X = HyperellipticCurve(R([-332, 1152, -1012, -8, 49, 4]))
magma: X,pi:= SimplifiedModel(C);
Invariants
Conductor: | \( N \) | \(=\) | \(13696\) | \(=\) | \( 2^{7} \cdot 107 \) | magma: Conductor(LSeries(C)); Factorization($1);
|
Discriminant: | \( \Delta \) | \(=\) | \(-109568\) | \(=\) | \( - 2^{10} \cdot 107 \) | magma: Discriminant(C); Factorization(Integers()!$1);
|
Igusa-Clebsch invariants
Igusa invariants
G2 invariants
\( I_2 \) | \(=\) | \(122264\) | \(=\) | \( 2^{3} \cdot 17 \cdot 29 \cdot 31 \) |
\( I_4 \) | \(=\) | \(117761944\) | \(=\) | \( 2^{3} \cdot 14720243 \) |
\( I_6 \) | \(=\) | \(4373366507708\) | \(=\) | \( 2^{2} \cdot 11 \cdot 2311 \cdot 5569 \cdot 7723 \) |
\( I_{10} \) | \(=\) | \(-13696\) | \(=\) | \( - 2^{7} \cdot 107 \) |
\( J_2 \) | \(=\) | \(122264\) | \(=\) | \( 2^{3} \cdot 17 \cdot 29 \cdot 31 \) |
\( J_4 \) | \(=\) | \(544345608\) | \(=\) | \( 2^{3} \cdot 3 \cdot 22681067 \) |
\( J_6 \) | \(=\) | \(3009566254336\) | \(=\) | \( 2^{8} \cdot 239 \cdot 49188779 \) |
\( J_8 \) | \(=\) | \(17912366892811760\) | \(=\) | \( 2^{4} \cdot 5 \cdot 181 \cdot 197 \cdot 4231 \cdot 1484141 \) |
\( J_{10} \) | \(=\) | \(-109568\) | \(=\) | \( - 2^{10} \cdot 107 \) |
\( g_1 \) | \(=\) | \(-26680443465746439572576/107\) | ||
\( g_2 \) | \(=\) | \(-971562104378078994348/107\) | ||
\( g_3 \) | \(=\) | \(-43934041117291009744/107\) |
sage: C.igusa_clebsch_invariants(); [factor(a) for a in _]
magma: IgusaClebschInvariants(C); IgusaInvariants(C); G2Invariants(C);
Automorphism group
\(\mathrm{Aut}(X)\) | \(\simeq\) | $C_2$ | magma: AutomorphismGroup(C); IdentifyGroup($1);
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\(\mathrm{Aut}(X_{\overline{\Q}})\) | \(\simeq\) | $C_2$ | magma: AutomorphismGroup(ChangeRing(C,AlgebraicClosure(Rationals()))); IdentifyGroup($1);
|
Rational points
All points: \((1 : 0 : 0)\)
magma: [C![1,0,0]]; // minimal model
magma: [C![1,0,0]]; // simplified model
Number of rational Weierstrass points: \(1\)
magma: #Roots(HyperellipticPolynomials(SimplifiedModel(C)));
This curve is locally solvable everywhere.
magma: f,h:=HyperellipticPolynomials(C); g:=4*f+h^2; HasPointsEverywhereLocally(g,2) and (#Roots(ChangeRing(g,RealField())) gt 0 or LeadingCoefficient(g) gt 0);
Mordell-Weil group of the Jacobian
Group structure: \(\Z/{2}\Z\)
magma: MordellWeilGroupGenus2(Jacobian(C));
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - 4xz + 2z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2 + z^3\) | \(0\) | \(2\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - 4xz + 2z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2 + z^3\) | \(0\) | \(2\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - 4xz + 2z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(x^2z - 4xz^2 + 2z^3\) | \(0\) | \(2\) |
2-torsion field: 6.2.5861888.2
BSD invariants
Hasse-Weil conjecture: | unverified |
Analytic rank: | \(0\) |
Mordell-Weil rank: | \(0\) |
2-Selmer rank: | \(1\) |
Regulator: | \( 1 \) |
Real period: | \( 0.378972 \) |
Tamagawa product: | \( 2 \) |
Torsion order: | \( 2 \) |
Leading coefficient: | \( 1.705377 \) |
Analytic order of Ш: | \( 9 \) (rounded) |
Order of Ш: | square |
Local invariants
Prime | ord(\(N\)) | ord(\(\Delta\)) | Tamagawa | L-factor | Cluster picture |
---|---|---|---|---|---|
\(2\) | \(7\) | \(10\) | \(2\) | \(1 - T\) | |
\(107\) | \(1\) | \(1\) | \(1\) | \(( 1 - T )( 1 + 107 T^{2} )\) |
Galois representations
The mod-$\ell$ Galois representation has maximal image \(\GSp(4,\F_\ell)\) for all primes \( \ell \) except those listed.
Prime \(\ell\) | mod-\(\ell\) image | Is torsion prime? |
---|---|---|
\(2\) | 2.60.1 | yes |
\(3\) | 3.80.2 | no |
Sato-Tate group
\(\mathrm{ST}\) | \(\simeq\) | $\mathrm{USp}(4)$ |
\(\mathrm{ST}^0\) | \(\simeq\) | \(\mathrm{USp}(4)\) |
Decomposition of the Jacobian
Simple over \(\overline{\Q}\)
magma: HeuristicDecompositionFactors(C);
Endomorphisms of the Jacobian
Not of \(\GL_2\)-type over \(\Q\)
Endomorphism ring over \(\Q\):
\(\End (J_{})\) | \(\simeq\) | \(\Z\) |
\(\End (J_{}) \otimes \Q \) | \(\simeq\) | \(\Q\) |
\(\End (J_{}) \otimes \R\) | \(\simeq\) | \(\R\) |
All \(\overline{\Q}\)-endomorphisms of the Jacobian are defined over \(\Q\).
magma: //Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
magma: HeuristicIsGL2(C); HeuristicEndomorphismDescription(C); HeuristicEndomorphismFieldOfDefinition(C);
magma: HeuristicIsGL2(C : Geometric := true); HeuristicEndomorphismDescription(C : Geometric := true); HeuristicEndomorphismLatticeDescription(C);