Properties

Label 847.d.456533.1
Conductor 847
Discriminant 456533
Sato-Tate group $G_{3,3}$
\(\End(J_{\overline{\Q}}) \otimes \R\) \(\R \times \R\)
\(\End(J_{\overline{\Q}}) \otimes \Q\) \(\Q \times \Q\)
\(\overline{\Q}\)-simple no
\(\mathrm{GL}_2\)-type yes

Related objects

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Show commands for: Magma / SageMath

Minimal equation

magma: R<x> := PolynomialRing(Rationals()); C := HyperellipticCurve(R![4, -24, 37, 3, -22, -9, -1], R![1]);
 
sage: R.<x> = PolynomialRing(QQ); C = HyperellipticCurve(R([4, -24, 37, 3, -22, -9, -1]), R([1]))
 

$y^2 + y = -x^6 - 9x^5 - 22x^4 + 3x^3 + 37x^2 - 24x + 4$

Invariants

magma: Conductor(LSeries(C)); Factorization($1);
 
\( N \)  =  \( 847 \)  =  \( 7 \cdot 11^{2} \)
magma: Discriminant(C); Factorization(Integers()!$1);
 
\( \Delta \)  =  \(456533\)  =  \( 7^{3} \cdot 11^{3} \)

Igusa-Clebsch invariants

magma: IgusaClebschInvariants(C); [Factorization(Integers()!a): a in $1];
 
sage: C.igusa_clebsch_invariants(); [factor(a) for a in _]
 

Igusa invariants

magma: IgusaInvariants(C); [Factorization(Integers()!a): a in $1];
 

G2 invariants

magma: G2Invariants(C);
 

\( I_2 \)  =  \(363808\)  =  \( 2^{5} \cdot 11369 \)
\( I_4 \)  =  \(162112\)  =  \( 2^{6} \cdot 17 \cdot 149 \)
\( I_6 \)  =  \(19446212608\)  =  \( 2^{11} \cdot 9495221 \)
\( I_{10} \)  =  \(1869959168\)  =  \( 2^{12} \cdot 7^{3} \cdot 11^{3} \)
\( J_2 \)  =  \(45476\)  =  \( 2^{2} \cdot 11369 \)
\( J_4 \)  =  \(86167752\)  =  \( 2^{3} \cdot 3 \cdot 11 \cdot 23^{2} \cdot 617 \)
\( J_6 \)  =  \(217689875480\)  =  \( 2^{3} \cdot 5 \cdot 7^{3} \cdot 11^{2} \cdot 131129 \)
\( J_8 \)  =  \(618695823148744\)  =  \( 2^{3} \cdot 11^{2} \cdot 571 \cdot 1119349523 \)
\( J_{10} \)  =  \(456533\)  =  \( 7^{3} \cdot 11^{3} \)
\( g_1 \)  =  \(194496275421254111077376/456533\)
\( g_2 \)  =  \(736713878289412204032/41503\)
\( g_3 \)  =  \(10847340081772160/11\)
Alternative geometric invariants: Igusa-Clebsch, Igusa, G2

Automorphism group

magma: AutomorphismGroup(C); IdentifyGroup($1);
 
\(\mathrm{Aut}(X)\)\(\simeq\) \(V_4 \) (GAP id : [4,2])
magma: AutomorphismGroup(ChangeRing(C,AlgebraicClosure(Rationals()))); IdentifyGroup($1);
 
\(\mathrm{Aut}(X_{\overline{\Q}})\)\(\simeq\) \(V_4 \) (GAP id : [4,2])

Rational points

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);
 

This curve is locally solvable except over $\Q_{11}$.

magma: [];
 

There are no rational points.

magma: #Roots(HyperellipticPolynomials(SimplifiedModel(C)));
 

Number of rational Weierstrass points: \(0\)

Invariants of the Jacobian:

Analytic rank: \(0\)

magma: TwoSelmerGroup(Jacobian(C)); NumberOfGenerators($1);
 

2-Selmer rank: \(1\)

magma: HasSquareSha(Jacobian(C));
 

Order of Ш*: twice a square

Regulator: 1.0

Real period: 9.8294553339800689572005129876

Tamagawa numbers: 3 (p = 7), 1 (p = 11)

magma: TorsionSubgroup(Jacobian(SimplifiedModel(C))); AbelianInvariants($1);
 

Torsion: \(\Z/{15}\Z\)

2-torsion field: 6.0.54208.1

Sato-Tate group

\(\mathrm{ST}\)\(\simeq\) $G_{3,3}$
\(\mathrm{ST}^0\)\(\simeq\) \(\mathrm{SU}(2)\times\mathrm{SU}(2)\)

Decomposition

Splits over \(\Q\)

Decomposes up to isogeny as the product of the non-isogenous elliptic curves:
  Elliptic curve 77.b2
  Elliptic curve 11.a3

Endomorphisms

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 \(\Q\).