Minimal equation
Minimal equation
Simplified equation
$y^2 + (x^3 + 1)y = 2x^5 - 10x^4 + 11x^3 - 2x^2 - x$ | (homogenize, simplify) |
$y^2 + (x^3 + z^3)y = 2x^5z - 10x^4z^2 + 11x^3z^3 - 2x^2z^4 - xz^5$ | (dehomogenize, simplify) |
$y^2 = x^6 + 8x^5 - 40x^4 + 46x^3 - 8x^2 - 4x + 1$ | (homogenize, minimize) |
sage: R.<x> = PolynomialRing(QQ); C = HyperellipticCurve(R([0, -1, -2, 11, -10, 2]), R([1, 0, 0, 1]));
magma: R<x> := PolynomialRing(Rationals()); C := HyperellipticCurve(R![0, -1, -2, 11, -10, 2], R![1, 0, 0, 1]);
sage: X = HyperellipticCurve(R([1, -4, -8, 46, -40, 8, 1]))
magma: X,pi:= SimplifiedModel(C);
Invariants
Conductor: | \( N \) | \(=\) | \(88034\) | \(=\) | \( 2 \cdot 44017 \) | magma: Conductor(LSeries(C)); Factorization($1);
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Discriminant: | \( \Delta \) | \(=\) | \(176068\) | \(=\) | \( 2^{2} \cdot 44017 \) | magma: Discriminant(C); Factorization(Integers()!$1);
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Igusa-Clebsch invariants
Igusa invariants
G2 invariants
\( I_2 \) | \(=\) | \(3028\) | \(=\) | \( 2^{2} \cdot 757 \) |
\( I_4 \) | \(=\) | \(146233\) | \(=\) | \( 257 \cdot 569 \) |
\( I_6 \) | \(=\) | \(127602253\) | \(=\) | \( 131 \cdot 974063 \) |
\( I_{10} \) | \(=\) | \(22536704\) | \(=\) | \( 2^{9} \cdot 44017 \) |
\( J_2 \) | \(=\) | \(757\) | \(=\) | \( 757 \) |
\( J_4 \) | \(=\) | \(17784\) | \(=\) | \( 2^{3} \cdot 3^{2} \cdot 13 \cdot 19 \) |
\( J_6 \) | \(=\) | \(513140\) | \(=\) | \( 2^{2} \cdot 5 \cdot 25657 \) |
\( J_8 \) | \(=\) | \(18044081\) | \(=\) | \( 11 \cdot 677 \cdot 2423 \) |
\( J_{10} \) | \(=\) | \(176068\) | \(=\) | \( 2^{2} \cdot 44017 \) |
\( g_1 \) | \(=\) | \(248587563395557/176068\) | ||
\( g_2 \) | \(=\) | \(1928666321478/44017\) | ||
\( g_3 \) | \(=\) | \(73513590965/44017\) |
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);
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Rational points
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((1 : -1 : 0)\) | \((0 : 0 : 1)\) | \((0 : -1 : 1)\) | \((1 : 0 : 1)\) | \((1 : -2 : 1)\) |
\((2 : -3 : 1)\) | \((2 : -6 : 1)\) | \((1 : -12 : 3)\) | \((3 : -12 : 2)\) | \((1 : -16 : 3)\) | \((3 : -23 : 2)\) |
\((1 : -24 : 4)\) | \((1 : -36 : 5)\) | \((1 : -41 : 4)\) | \((1 : -90 : 5)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((1 : -1 : 0)\) | \((0 : 0 : 1)\) | \((0 : -1 : 1)\) | \((1 : 0 : 1)\) | \((1 : -2 : 1)\) |
\((2 : -3 : 1)\) | \((2 : -6 : 1)\) | \((1 : -12 : 3)\) | \((3 : -12 : 2)\) | \((1 : -16 : 3)\) | \((3 : -23 : 2)\) |
\((1 : -24 : 4)\) | \((1 : -36 : 5)\) | \((1 : -41 : 4)\) | \((1 : -90 : 5)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : -1 : 0)\) | \((1 : 1 : 0)\) | \((0 : -1 : 1)\) | \((0 : 1 : 1)\) | \((1 : -2 : 1)\) | \((1 : 2 : 1)\) |
\((2 : -3 : 1)\) | \((2 : 3 : 1)\) | \((1 : -4 : 3)\) | \((1 : 4 : 3)\) | \((3 : -11 : 2)\) | \((3 : 11 : 2)\) |
\((1 : -17 : 4)\) | \((1 : 17 : 4)\) | \((1 : -54 : 5)\) | \((1 : 54 : 5)\) |
magma: [C![0,-1,1],C![0,0,1],C![1,-90,5],C![1,-41,4],C![1,-36,5],C![1,-24,4],C![1,-16,3],C![1,-12,3],C![1,-2,1],C![1,-1,0],C![1,0,0],C![1,0,1],C![2,-6,1],C![2,-3,1],C![3,-23,2],C![3,-12,2]]; // minimal model
magma: [C![0,-1,1],C![0,1,1],C![1,-54,5],C![1,-17,4],C![1,54,5],C![1,17,4],C![1,-4,3],C![1,4,3],C![1,-2,1],C![1,-1,0],C![1,1,0],C![1,2,1],C![2,-3,1],C![2,3,1],C![3,-11,2],C![3,11,2]]; // simplified model
Number of rational Weierstrass points: \(0\)
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: \(\Z \oplus \Z \oplus \Z\)
magma: MordellWeilGroupGenus2(Jacobian(C));
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((1 : -16 : 3) - (1 : 0 : 0)\) | \(z (3x - z)\) | \(=\) | \(0,\) | \(9y\) | \(=\) | \(-9x^3 - 5z^3\) | \(0.703530\) | \(\infty\) |
\(2 \cdot(1 : -2 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \((x - z)^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2\) | \(0.585526\) | \(\infty\) |
\((0 : 0 : 1) + (1 : -2 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \(x (x - z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2\) | \(0.057772\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((1 : -16 : 3) - (1 : 0 : 0)\) | \(z (3x - z)\) | \(=\) | \(0,\) | \(9y\) | \(=\) | \(-9x^3 - 5z^3\) | \(0.703530\) | \(\infty\) |
\(2 \cdot(1 : -2 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \((x - z)^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2\) | \(0.585526\) | \(\infty\) |
\((0 : 0 : 1) + (1 : -2 : 1) - (1 : -1 : 0) - (1 : 0 : 0)\) | \(x (x - z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2\) | \(0.057772\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - (1 : -1 : 0) - (1 : 1 : 0)\) | \(z (3x - z)\) | \(=\) | \(0,\) | \(9y\) | \(=\) | \(-17x^3 - 9z^3\) | \(0.703530\) | \(\infty\) |
\(2 \cdot(1 : -2 : 1) - (1 : -1 : 0) - (1 : 1 : 0)\) | \((x - z)^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(x^3 - 4xz^2 + z^3\) | \(0.585526\) | \(\infty\) |
\((0 : 1 : 1) + (1 : -2 : 1) - (1 : -1 : 0) - (1 : 1 : 0)\) | \(x (x - z)\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(x^3 - 4xz^2 + z^3\) | \(0.057772\) | \(\infty\) |
2-torsion field: 6.2.2817088.1
BSD invariants
Hasse-Weil conjecture: | unverified |
Analytic rank: | \(3\) (upper bound) |
Mordell-Weil rank: | \(3\) |
2-Selmer rank: | \(3\) |
Regulator: | \( 0.023187 \) |
Real period: | \( 19.36559 \) |
Tamagawa product: | \( 2 \) |
Torsion order: | \( 1 \) |
Leading coefficient: | \( 0.898085 \) |
Analytic order of Ш: | \( 1 \) (rounded) |
Order of Ш: | square |
Local invariants
Prime | ord(\(N\)) | ord(\(\Delta\)) | Tamagawa | L-factor | Cluster picture |
---|---|---|---|---|---|
\(2\) | \(1\) | \(2\) | \(2\) | \(( 1 + T )( 1 + T + 2 T^{2} )\) | |
\(44017\) | \(1\) | \(1\) | \(1\) | \(( 1 - T )( 1 - 118 T + 44017 T^{2} )\) |
Galois representations
The mod-$\ell$ Galois representation has maximal image \(\GSp(4,\F_\ell)\) for all primes \( \ell \) .
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);