# Properties

 Label 950.c1 Conductor $950$ Discriminant $-15200000000$ j-invariant $$-\frac{11993263569}{972800}$$ CM no Rank $0$ Torsion structure trivial

# Related objects

Show commands: Magma / Oscar / PariGP / SageMath

## Simplified equation

 $$y^2+xy=x^3-x^2-1192x+17216$$ y^2+xy=x^3-x^2-1192x+17216 (homogenize, simplify) $$y^2z+xyz=x^3-x^2z-1192xz^2+17216z^3$$ y^2z+xyz=x^3-x^2z-1192xz^2+17216z^3 (dehomogenize, simplify) $$y^2=x^3-19075x+1082750$$ y^2=x^3-19075x+1082750 (homogenize, minimize)

comment: Define the curve

sage: E = EllipticCurve([1, -1, 0, -1192, 17216])

gp: E = ellinit([1, -1, 0, -1192, 17216])

magma: E := EllipticCurve([1, -1, 0, -1192, 17216]);

oscar: E = elliptic_curve([1, -1, 0, -1192, 17216])

sage: E.short_weierstrass_model()

magma: WeierstrassModel(E);

oscar: short_weierstrass_model(E)

## Mordell-Weil group structure

trivial

magma: MordellWeilGroup(E);

## Integral points

None

comment: Integral points

sage: E.integral_points()

magma: IntegralPoints(E);

## Invariants

 Conductor: $$950$$ = $2 \cdot 5^{2} \cdot 19$ comment: Conductor  sage: E.conductor().factor()  gp: ellglobalred(E)[1]  magma: Conductor(E);  oscar: conductor(E) Discriminant: $-15200000000$ = $-1 \cdot 2^{11} \cdot 5^{8} \cdot 19$ comment: Discriminant  sage: E.discriminant().factor()  gp: E.disc  magma: Discriminant(E);  oscar: discriminant(E) j-invariant: $$-\frac{11993263569}{972800}$$ = $-1 \cdot 2^{-11} \cdot 3^{3} \cdot 5^{-2} \cdot 7^{3} \cdot 19^{-1} \cdot 109^{3}$ comment: j-invariant  sage: E.j_invariant().factor()  gp: E.j  magma: jInvariant(E);  oscar: j_invariant(E) Endomorphism ring: $\Z$ Geometric endomorphism ring: $$\Z$$ (no potential complex multiplication) sage: E.has_cm()  magma: HasComplexMultiplication(E); Sato-Tate group: $\mathrm{SU}(2)$ Faltings height: $0.69994180674041359524025951763\dots$ gp: ellheight(E)  magma: FaltingsHeight(E);  oscar: faltings_height(E) Stable Faltings height: $-0.10477714947663659206012014898\dots$ magma: StableFaltingsHeight(E);  oscar: stable_faltings_height(E) $abc$ quality: $0.9384961498890672\dots$ Szpiro ratio: $4.81230826673846\dots$

## BSD invariants

 Analytic rank: $0$ sage: E.analytic_rank()  gp: ellanalyticrank(E)  magma: AnalyticRank(E); Regulator: $1$ comment: Regulator  sage: E.regulator()  G = E.gen \\ if available matdet(ellheightmatrix(E,G))  magma: Regulator(E); Real period: $1.2198252026250877293842094170\dots$ comment: Real Period  sage: E.period_lattice().omega()  gp: if(E.disc>0,2,1)*E.omega[1]  magma: (Discriminant(E) gt 0 select 2 else 1) * RealPeriod(E); Tamagawa product: $2$  = $1\cdot2\cdot1$ comment: Tamagawa numbers  sage: E.tamagawa_numbers()  gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]  magma: TamagawaNumbers(E);  oscar: tamagawa_numbers(E) Torsion order: $1$ comment: Torsion order  sage: E.torsion_order()  gp: elltors(E)[1]  magma: Order(TorsionSubgroup(E));  oscar: prod(torsion_structure(E)[1]) Analytic order of Ш: $1$ ( exact) comment: Order of Sha  sage: E.sha().an_numerical()  magma: MordellWeilShaInformation(E); Special value: $L(E,1)$ ≈ $2.4396504052501754587684188340$ comment: Special L-value  r = E.rank(); E.lseries().dokchitser().derivative(1,r)/r.factorial()  gp: [r,L1r] = ellanalyticrank(E); L1r/r!  magma: Lr1 where r,Lr1 := AnalyticRank(E: Precision:=12);

## BSD formula

$\displaystyle 2.439650405 \approx L(E,1) = \frac{\# Ш(E/\Q)\cdot \Omega_E \cdot \mathrm{Reg}(E/\Q) \cdot \prod_p c_p}{\#E(\Q)_{\rm tor}^2} \approx \frac{1 \cdot 1.219825 \cdot 1.000000 \cdot 2}{1^2} \approx 2.439650405$

# self-contained SageMath code snippet for the BSD formula (checks rank, computes analytic sha)

E = EllipticCurve(%s); r = E.rank(); ar = E.analytic_rank(); assert r == ar;

Lr1 = E.lseries().dokchitser().derivative(1,r)/r.factorial(); sha = E.sha().an_numerical();

omega = E.period_lattice().omega(); reg = E.regulator(); tam = E.tamagawa_product(); tor = E.torsion_order();

assert r == ar; print("analytic sha: " + str(RR(Lr1) * tor^2 / (omega * reg * tam)))

/* self-contained Magma code snippet for the BSD formula (checks rank, computes analyiic sha) */

E := EllipticCurve(%s); r := Rank(E); ar,Lr1 := AnalyticRank(E: Precision := 12); assert r eq ar;

sha := MordellWeilShaInformation(E); omega := RealPeriod(E) * (Discriminant(E) gt 0 select 2 else 1);

reg := Regulator(E); tam := &*TamagawaNumbers(E); tor := #TorsionSubgroup(E);

assert r eq ar; print "analytic sha:", Lr1 * tor^2 / (omega * reg * tam);

## Modular invariants

$$q - q^{2} + 3 q^{3} + q^{4} - 3 q^{6} + 5 q^{7} - q^{8} + 6 q^{9} - 4 q^{11} + 3 q^{12} + q^{13} - 5 q^{14} + q^{16} + 3 q^{17} - 6 q^{18} + q^{19} + O(q^{20})$$

comment: q-expansion of modular form

sage: E.q_eigenform(20)

\\ actual modular form, use for small N

[mf,F] = mffromell(E)

Ser(mfcoefs(mf,20),q)

\\ or just the series

Ser(ellan(E,20),q)*q

magma: ModularForm(E);

Modular degree: 2112
comment: Modular degree

sage: E.modular_degree()

gp: ellmoddegree(E)

magma: ModularDegree(E);

$\Gamma_0(N)$-optimal: yes
Manin constant: 1
comment: Manin constant

magma: ManinConstant(E);

## Local data

This elliptic curve is not semistable. There are 3 primes $p$ of bad reduction:

$p$ Tamagawa number Kodaira symbol Reduction type Root number $v_p(N)$ $v_p(\Delta)$ $v_p(\mathrm{den}(j))$
$2$ $1$ $I_{11}$ nonsplit multiplicative 1 1 11 11
$5$ $2$ $I_{2}^{*}$ additive 1 2 8 2
$19$ $1$ $I_{1}$ split multiplicative -1 1 1 1

comment: Local data

sage: E.local_data()

gp: ellglobalred(E)[5]

magma: [LocalInformation(E,p) : p in BadPrimes(E)];

oscar: [(p,tamagawa_number(E,p), kodaira_symbol(E,p), reduction_type(E,p)) for p in bad_primes(E)]

## Galois representations

The $\ell$-adic Galois representation has maximal image for all primes $\ell$.

comment: mod p Galois image

sage: rho = E.galois_representation(); [rho.image_type(p) for p in rho.non_surjective()]

magma: [GaloisRepresentation(E,p): p in PrimesUpTo(20)];

gens = [[77, 2, 77, 3], [1, 2, 0, 1], [1, 1, 151, 0], [97, 2, 97, 3], [1, 0, 2, 1], [151, 2, 150, 3], [39, 2, 0, 1]]

GL(2,Integers(152)).subgroup(gens)

Gens := [[77, 2, 77, 3], [1, 2, 0, 1], [1, 1, 151, 0], [97, 2, 97, 3], [1, 0, 2, 1], [151, 2, 150, 3], [39, 2, 0, 1]];

sub<GL(2,Integers(152))|Gens>;

The image $H:=\rho_E(\Gal(\overline{\Q}/\Q))$ of the adelic Galois representation has level $$152 = 2^{3} \cdot 19$$, index $2$, genus $0$, and generators

$\left(\begin{array}{rr} 77 & 2 \\ 77 & 3 \end{array}\right),\left(\begin{array}{rr} 1 & 2 \\ 0 & 1 \end{array}\right),\left(\begin{array}{rr} 1 & 1 \\ 151 & 0 \end{array}\right),\left(\begin{array}{rr} 97 & 2 \\ 97 & 3 \end{array}\right),\left(\begin{array}{rr} 1 & 0 \\ 2 & 1 \end{array}\right),\left(\begin{array}{rr} 151 & 2 \\ 150 & 3 \end{array}\right),\left(\begin{array}{rr} 39 & 2 \\ 0 & 1 \end{array}\right)$.

Input positive integer $m$ to see the generators of the reduction of $H$ to $\mathrm{GL}_2(\Z/m\Z)$:

The torsion field $K:=\Q(E[152])$ is a degree-$94556160$ Galois extension of $\Q$ with $\Gal(K/\Q)$ isomorphic to the projection of $H$ to $\GL_2(\Z/152\Z)$.

The table below list all primes $\ell$ for which the Serre invariants associated to the mod-$\ell$ Galois representation are exceptional.

$\ell$ Reduction type Serre weight Serre conductor
$2$ nonsplit multiplicative $4$ $$475 = 5^{2} \cdot 19$$
$5$ additive $18$ $$38 = 2 \cdot 19$$
$11$ good $2$ $$475 = 5^{2} \cdot 19$$
$19$ split multiplicative $20$ $$50 = 2 \cdot 5^{2}$$

## Isogenies

gp: ellisomat(E)

This curve has no rational isogenies. Its isogeny class 950.c consists of this curve only.

## Twists

The minimal quadratic twist of this elliptic curve is 190.b1, its twist by $5$.

## Growth of torsion in number fields

The number fields $K$ of degree less than 24 such that $E(K)_{\rm tors}$ is strictly larger than $E(\Q)_{\rm tors}$ (which is trivial) are as follows:

 $[K:\Q]$ $E(K)_{\rm tors}$ Base change curve $K$ $3$ 3.1.152.1 $$\Z/2\Z$$ not in database $6$ 6.0.3511808.1 $$\Z/2\Z \oplus \Z/2\Z$$ not in database $8$ 8.2.71253006750000.6 $$\Z/3\Z$$ not in database $12$ deg 12 $$\Z/4\Z$$ not in database

We only show fields where the torsion growth is primitive. For fields not in the database, click on the degree shown to reveal the defining polynomial.

## Iwasawa invariants

 $p$ Reduction type $\lambda$-invariant(s) $\mu$-invariant(s) 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 nonsplit ss add ord ord ord ord split ord ord ord ord ord ord ss 3 0,0 - 0 0 2 0 1 0 0 0 0 0 0 0,0 0 0,0 - 0 0 0 0 0 0 0 0 0 0 0 0,0

An entry - indicates that the invariants are not computed because the reduction is additive.

## $p$-adic regulators

All $p$-adic regulators are identically $1$ since the rank is $0$.