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SageMath
E = EllipticCurve("d1")
E.isogeny_class()
Elliptic curves in class 225.d
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality | CM discriminant |
---|---|---|---|---|---|---|---|---|---|
225.d1 | 225b2 | \([0, 0, 1, 0, -4219]\) | \(0\) | \(-7688671875\) | \([]\) | \(120\) | \(0.57580\) | \(-3\) | |
225.d2 | 225b1 | \([0, 0, 1, 0, 156]\) | \(0\) | \(-10546875\) | \([3]\) | \(40\) | \(0.026494\) | \(\Gamma_0(N)\)-optimal | \(-3\) |
Rank
sage: E.rank()
The elliptic curves in class 225.d have rank \(0\).
Complex multiplication
Each elliptic curve in class 225.d has complex multiplication by an order in the imaginary quadratic field \(\Q(\sqrt{-3}) \).Modular form 225.2.a.d
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.
\(\left(\begin{array}{rr} 1 & 3 \\ 3 & 1 \end{array}\right)\)
Isogeny graph
sage: E.isogeny_graph().plot(edge_labels=True)
The vertices are labelled with LMFDB labels.