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SageMath
E = EllipticCurve("bf1")
E.isogeny_class()
Elliptic curves in class 7200.bf
sage: E.isogeny_class().curves
| LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality | CM discriminant |
|---|---|---|---|---|---|---|---|---|---|
| 7200.bf1 | 7200ba2 | \([0, 0, 0, -300, 0]\) | \(1728\) | \(1728000000\) | \([2]\) | \(2560\) | \(0.46199\) | \(-4\) | |
| 7200.bf2 | 7200ba1 | \([0, 0, 0, 75, 0]\) | \(1728\) | \(-27000000\) | \([2]\) | \(1280\) | \(0.11541\) | \(\Gamma_0(N)\)-optimal | \(-4\) |
Rank
sage: E.rank()
The elliptic curves in class 7200.bf have rank \(0\).
Complex multiplication
Each elliptic curve in class 7200.bf has complex multiplication by an order in the imaginary quadratic field \(\Q(\sqrt{-1}) \).Modular form 7200.2.a.bf
sage: E.q_eigenform(10)
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.
