Properties

Label 1600.l
Number of curves $2$
Conductor $1600$
CM \(\Q(\sqrt{-1}) \)
Rank $1$
Graph

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Show commands for: SageMath
sage: E = EllipticCurve("l1")
 
sage: E.isogeny_class()
 

Elliptic curves in class 1600.l

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality CM discriminant
1600.l1 1600u2 \([0, 0, 0, -500, 0]\) \(1728\) \(8000000000\) \([2]\) \(640\) \(0.58969\)   \(-4\)
1600.l2 1600u1 \([0, 0, 0, 125, 0]\) \(1728\) \(-125000000\) \([2]\) \(320\) \(0.24312\) \(\Gamma_0(N)\)-optimal \(-4\)

Rank

sage: E.rank()
 

The elliptic curves in class 1600.l have rank \(1\).

Complex multiplication

Each elliptic curve in class 1600.l has complex multiplication by an order in the imaginary quadratic field \(\Q(\sqrt{-1}) \).

Modular form 1600.2.a.l

sage: E.q_eigenform(10)
 
\(q - 3q^{9} - 4q^{13} + 8q^{17} + O(q^{20})\)  Toggle raw display

Isogeny matrix

sage: E.isogeny_class().matrix()
 

The \(i,j\) entry is the smallest degree of a cyclic isogeny between the \(i\)-th and \(j\)-th curve in the isogeny class, in the LMFDB numbering.

\(\left(\begin{array}{rr} 1 & 2 \\ 2 & 1 \end{array}\right)\)

Isogeny graph

sage: E.isogeny_graph().plot(edge_labels=True)
 

The vertices are labelled with LMFDB labels.