Minimal Weierstrass equation
\(y^2=x^3-11x+14\) 
Mordell-Weil group structure
\(\Z/{4}\Z\)
Torsion generators
\( \left(1, 2\right) \)
Integral points
\((1,\pm 2)\), \( \left(2, 0\right) \)
Invariants
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sage: E.conductor().factor()
gp: ellglobalred(E)[1]
magma: Conductor(E);
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| Conductor: | \( 32 \) | = | \(2^{5}\) |
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sage: E.discriminant().factor()
gp: E.disc
magma: Discriminant(E);
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| Discriminant: | \(512 \) | = | \(2^{9} \) |
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sage: E.j_invariant().factor()
gp: E.j
magma: jInvariant(E);
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| j-invariant: | \( 287496 \) | = | \(2^{3} \cdot 3^{3} \cdot 11^{3}\) |
| Endomorphism ring: | \(\Z\) | ||
| Geometric endomorphism ring: | \(\Z[\sqrt{-4}]\) | (potential complex multiplication) | |
| Sato-Tate group: | $N(\mathrm{U}(1))$ | ||
| Faltings height: | \(-0.61738574535156420883504296185\dots\) | ||
| Stable Faltings height: | \(-1.1372461307715231908979670529\dots\) | ||
BSD invariants
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sage: E.rank()
magma: Rank(E);
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| Analytic rank: | \(0\) | ||
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sage: E.regulator()
magma: Regulator(E);
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| Regulator: | \(1\) | ||
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sage: E.period_lattice().omega()
gp: E.omega[1]
magma: RealPeriod(E);
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| Real period: | \(5.2441151085842396209296791798\dots\) | ||
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sage: E.tamagawa_numbers()
gp: gr=ellglobalred(E); [[gr[4][i,1],gr[5][i][4]] | i<-[1..#gr[4][,1]]]
magma: TamagawaNumbers(E);
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| Tamagawa product: | \( 2 \) = \( 2 \) | ||
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sage: E.torsion_order()
gp: elltors(E)[1]
magma: Order(TorsionSubgroup(E));
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| Torsion order: | \(4\) | ||
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sage: E.sha().an_numerical()
magma: MordellWeilShaInformation(E);
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| Analytic order of Ш: | \(1\) (exact) | ||
Modular invariants
For more coefficients, see the Downloads section to the right.
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sage: E.modular_degree()
magma: ModularDegree(E);
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| Modular degree: | 4 | ||
| \( \Gamma_0(N) \)-optimal: | no | ||
| Manin constant: | 2 | ||
Special L-value
\( L(E,1) \) ≈ \( 0.65551438857302995261620989747275764966 \)
Local data
This elliptic curve is not semistable. There is only one prime of bad reduction:
| prime | Tamagawa number | Kodaira symbol | Reduction type | Root number | ord(\(N\)) | ord(\(\Delta\)) | ord\((j)_{-}\) |
|---|---|---|---|---|---|---|---|
| \(2\) | \(2\) | \(I_0^{*}\) | Additive | -1 | 5 | 9 | 0 |
Galois representations
The mod \( p \) Galois representation has maximal image for all primes \( p < 1000 \) .
The image is a Borel subgroup if \(p=2\), the normalizer of a split Cartan subgroup if \(\left(\frac{ -1 }{p}\right)=+1\) or the normalizer of a nonsplit Cartan subgroup if \(\left(\frac{ -1 }{p}\right)=-1\).
$p$-adic data
$p$-adic regulators
All \(p\)-adic regulators are identically \(1\) since the rank is \(0\).
Iwasawa invariants
| $p$ | 2 |
|---|---|
| Reduction type | add |
| $\lambda$-invariant(s) | - |
| $\mu$-invariant(s) | - |
All Iwasawa $\lambda$ and $\mu$-invariants for primes $p\ge 3$ of good reduction are zero.
An entry - indicates that the invariants are not computed because the reduction is additive.
Isogenies
This curve has non-trivial cyclic isogenies of degree \(d\) for \(d=\)
2 and 4.
Its isogeny class 32.a
consists of 3 curves linked by isogenies of
degrees dividing 4.
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 $E(\Q)_{\rm tors}$ $\cong \Z/{4}\Z$ are as follows:
| $[K:\Q]$ | $K$ | $E(K)_{\rm tors}$ | Base change curve |
|---|---|---|---|
| $2$ | \(\Q(\sqrt{2}) \) | \(\Z/2\Z \times \Z/4\Z\) | 2.2.8.1-32.1-a6 |
| $4$ | 4.0.512.1 | \(\Z/8\Z\) | Not in database |
| $4$ | \(\Q(\zeta_{16})^+\) | \(\Z/2\Z \times \Z/8\Z\) | 4.4.2048.1-32.1-a2 |
| $8$ | 8.0.16777216.2 | \(\Z/4\Z \times \Z/4\Z\) | Not in database |
| $8$ | 8.0.4194304.1 | \(\Z/2\Z \times \Z/8\Z\) | Not in database |
| $8$ | 8.2.143327232.1 | \(\Z/12\Z\) | Not in database |
| $8$ | 8.0.8192000.1 | \(\Z/20\Z\) | Not in database |
| $16$ | 16.0.18014398509481984.1 | \(\Z/4\Z \times \Z/8\Z\) | Not in database |
| $16$ | 16.0.288230376151711744.2 | \(\Z/2\Z \times \Z/16\Z\) | Not in database |
| $16$ | 16.8.73786976294838206464.2 | \(\Z/2\Z \times \Z/16\Z\) | Not in database |
| $16$ | 16.0.20542695432781824.1 | \(\Z/3\Z \times \Z/12\Z\) | Not in database |
| $16$ | 16.4.1048576000000000000.1 | \(\Z/20\Z\) | Not in database |
| $16$ | 16.4.5258930030792146944.1 | \(\Z/2\Z \times \Z/12\Z\) | Not in database |
| $16$ | 16.0.17179869184000000.1 | \(\Z/2\Z \times \Z/20\Z\) | Not in database |
| $16$ | Deg 16 | \(\Z/40\Z\) | 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.