Minimal equation
Minimal equation
Simplified equation
$y^2 + y = 3x^5 - 7x^4 + 6x^3 - 2x^2$ | (homogenize, simplify) |
$y^2 + z^3y = 3x^5z - 7x^4z^2 + 6x^3z^3 - 2x^2z^4$ | (dehomogenize, simplify) |
$y^2 = 12x^5 - 28x^4 + 24x^3 - 8x^2 + 1$ | (homogenize, minimize) |
sage: R.<x> = PolynomialRing(QQ); C = HyperellipticCurve(R([0, 0, -2, 6, -7, 3]), R([1]));
magma: R<x> := PolynomialRing(Rationals()); C := HyperellipticCurve(R![0, 0, -2, 6, -7, 3], R![1]);
sage: X = HyperellipticCurve(R([1, 0, -8, 24, -28, 12]))
magma: X,pi:= SimplifiedModel(C);
Invariants
Conductor: | \( N \) | \(=\) | \(23289\) | \(=\) | \( 3 \cdot 7 \cdot 1109 \) | magma: Conductor(LSeries(C)); Factorization($1);
|
Discriminant: | \( \Delta \) | \(=\) | \(489069\) | \(=\) | \( 3^{2} \cdot 7^{2} \cdot 1109 \) | magma: Discriminant(C); Factorization(Integers()!$1);
|
Igusa-Clebsch invariants
Igusa invariants
G2 invariants
\( I_2 \) | \(=\) | \(32\) | \(=\) | \( 2^{5} \) |
\( I_4 \) | \(=\) | \(1984\) | \(=\) | \( 2^{6} \cdot 31 \) |
\( I_6 \) | \(=\) | \(59968\) | \(=\) | \( 2^{6} \cdot 937 \) |
\( I_{10} \) | \(=\) | \(-1956276\) | \(=\) | \( - 2^{2} \cdot 3^{2} \cdot 7^{2} \cdot 1109 \) |
\( J_2 \) | \(=\) | \(16\) | \(=\) | \( 2^{4} \) |
\( J_4 \) | \(=\) | \(-320\) | \(=\) | \( - 2^{6} \cdot 5 \) |
\( J_6 \) | \(=\) | \(-5184\) | \(=\) | \( - 2^{6} \cdot 3^{4} \) |
\( J_8 \) | \(=\) | \(-46336\) | \(=\) | \( - 2^{8} \cdot 181 \) |
\( J_{10} \) | \(=\) | \(-489069\) | \(=\) | \( - 3^{2} \cdot 7^{2} \cdot 1109 \) |
\( g_1 \) | \(=\) | \(-1048576/489069\) | ||
\( g_2 \) | \(=\) | \(1310720/489069\) | ||
\( g_3 \) | \(=\) | \(147456/54341\) |
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);
|
\(\mathrm{Aut}(X_{\overline{\Q}})\) | \(\simeq\) | $C_2$ | magma: AutomorphismGroup(ChangeRing(C,AlgebraicClosure(Rationals()))); IdentifyGroup($1);
|
Rational points
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((0 : 0 : 1)\) | \((0 : -1 : 1)\) | \((1 : 0 : 1)\) | \((1 : -1 : 1)\) | \((2 : -3 : 3)\) |
\((3 : 17 : 1)\) | \((3 : -18 : 1)\) | \((2 : -24 : 3)\) | \((-1 : -30 : 4)\) | \((-1 : -34 : 4)\) | \((5 : 75 : 1)\) |
\((5 : -76 : 1)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((0 : 0 : 1)\) | \((0 : -1 : 1)\) | \((1 : 0 : 1)\) | \((1 : -1 : 1)\) | \((2 : -3 : 3)\) |
\((3 : 17 : 1)\) | \((3 : -18 : 1)\) | \((2 : -24 : 3)\) | \((-1 : -30 : 4)\) | \((-1 : -34 : 4)\) | \((5 : 75 : 1)\) |
\((5 : -76 : 1)\) |
Known points | |||||
---|---|---|---|---|---|
\((1 : 0 : 0)\) | \((0 : -1 : 1)\) | \((0 : 1 : 1)\) | \((1 : -1 : 1)\) | \((1 : 1 : 1)\) | \((-1 : -4 : 4)\) |
\((-1 : 4 : 4)\) | \((2 : -21 : 3)\) | \((2 : 21 : 3)\) | \((3 : -35 : 1)\) | \((3 : 35 : 1)\) | \((5 : -151 : 1)\) |
\((5 : 151 : 1)\) |
magma: [C![-1,-34,4],C![-1,-30,4],C![0,-1,1],C![0,0,1],C![1,-1,1],C![1,0,0],C![1,0,1],C![2,-24,3],C![2,-3,3],C![3,-18,1],C![3,17,1],C![5,-76,1],C![5,75,1]]; // minimal model
magma: [C![-1,-4,4],C![-1,4,4],C![0,-1,1],C![0,1,1],C![1,-1,1],C![1,0,0],C![1,1,1],C![2,-21,3],C![2,21,3],C![3,-35,1],C![3,35,1],C![5,-151,1],C![5,151,1]]; // 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: \(\Z \oplus \Z\)
magma: MordellWeilGroupGenus2(Jacobian(C));
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((1 : 0 : 1) + (2 : -3 : 3) - 2 \cdot(1 : 0 : 0)\) | \((x - z) (3x - 2z)\) | \(=\) | \(0,\) | \(3y\) | \(=\) | \(xz^2 - z^3\) | \(0.140331\) | \(\infty\) |
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - xz + z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-xz^2 - z^3\) | \(0.087533\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\((1 : 0 : 1) + (2 : -3 : 3) - 2 \cdot(1 : 0 : 0)\) | \((x - z) (3x - 2z)\) | \(=\) | \(0,\) | \(3y\) | \(=\) | \(xz^2 - z^3\) | \(0.140331\) | \(\infty\) |
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - xz + z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-xz^2 - z^3\) | \(0.087533\) | \(\infty\) |
Generator | $D_0$ | Height | Order | |||||
---|---|---|---|---|---|---|---|---|
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \((x - z) (3x - 2z)\) | \(=\) | \(0,\) | \(3y\) | \(=\) | \(2xz^2 - z^3\) | \(0.140331\) | \(\infty\) |
\(D_0 - 2 \cdot(1 : 0 : 0)\) | \(x^2 - xz + z^2\) | \(=\) | \(0,\) | \(y\) | \(=\) | \(-2xz^2 - z^3\) | \(0.087533\) | \(\infty\) |
BSD invariants
Hasse-Weil conjecture: | unverified |
Analytic rank: | \(2\) |
Mordell-Weil rank: | \(2\) |
2-Selmer rank: | \(2\) |
Regulator: | \( 0.012241 \) |
Real period: | \( 11.70305 \) |
Tamagawa product: | \( 4 \) |
Torsion order: | \( 1 \) |
Leading coefficient: | \( 0.573028 \) |
Analytic order of Ш: | \( 1 \) (rounded) |
Order of Ш: | square |
Local invariants
Prime | ord(\(N\)) | ord(\(\Delta\)) | Tamagawa | L-factor | Cluster picture |
---|---|---|---|---|---|
\(3\) | \(1\) | \(2\) | \(2\) | \(( 1 + T )( 1 + 2 T + 3 T^{2} )\) | |
\(7\) | \(1\) | \(2\) | \(2\) | \(( 1 - T )( 1 + T + 7 T^{2} )\) | |
\(1109\) | \(1\) | \(1\) | \(1\) | \(( 1 - T )( 1 + 4 T + 1109 T^{2} )\) |
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? |
---|---|---|
\(2\) | 2.6.1 | 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);