Properties

Label 1005.a
Number of curves $2$
Conductor $1005$
CM no
Rank $1$
Graph

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Show commands: SageMath
E = EllipticCurve("a1")
 
E.isogeny_class()
 

Elliptic curves in class 1005.a

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality
1005.a1 1005b2 \([0, 1, 1, -3001, -70904]\) \(-2989967081734144/380653171875\) \(-380653171875\) \([]\) \(1440\) \(0.95590\)  
1005.a2 1005b1 \([0, 1, 1, 239, 295]\) \(1503484706816/890163675\) \(-890163675\) \([3]\) \(480\) \(0.40659\) \(\Gamma_0(N)\)-optimal

Rank

sage: E.rank()
 

The elliptic curves in class 1005.a have rank \(1\).

Complex multiplication

The elliptic curves in class 1005.a do not have complex multiplication.

Modular form 1005.2.a.a

sage: E.q_eigenform(10)
 
\(q + q^{3} - 2 q^{4} - q^{5} + 2 q^{7} + q^{9} - 6 q^{11} - 2 q^{12} + 2 q^{13} - q^{15} + 4 q^{16} - 3 q^{17} - q^{19} + O(q^{20})\) Copy content 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.

\(\left(\begin{array}{rr} 1 & 3 \\ 3 & 1 \end{array}\right)\)

Isogeny graph

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

The vertices are labelled with LMFDB labels.