Properties

Label 64.a
Number of curves 4
Conductor \(64\)
CM -4
Rank \(0\)
Graph

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Show commands for: SageMath
sage: E = EllipticCurve("64.a1")
sage: E.isogeny_class()

Elliptic curves in class 64.a

sage: E.isogeny_class().curves
LMFDB label Cremona label Weierstrass coefficients Torsion order Modular degree Optimality
64.a1 64a2 [0, 0, 0, -44, -112] 2 4  
64.a2 64a3 [0, 0, 0, -44, 112] 4 4  
64.a3 64a1 [0, 0, 0, -4, 0] 4 2 \(\Gamma_0(N)\)-optimal
64.a4 64a4 [0, 0, 0, 1, 0] 2 4  

Rank

sage: E.rank()

The elliptic curves in class 64.a have rank \(0\).

Modular form 64.2.1.a

sage: E.q_eigenform(10)
\( q + 2q^{5} - 3q^{9} - 6q^{13} + 2q^{17} + O(q^{20}) \)

Isogeny matrix

sage: E.isogeny_class().matrix()

\(\left(\begin{array}{rrrr} 1 & 4 & 2 & 4 \\ 4 & 1 & 2 & 4 \\ 2 & 2 & 1 & 2 \\ 4 & 4 & 2 & 1 \end{array}\right)\)

Isogeny graph

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