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SageMath
E = EllipticCurve("a1")
E.isogeny_class()
Elliptic curves in class 1900a
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
1900.a1 | 1900a1 | \([0, 1, 0, -23033, 1247188]\) | \(5405726654464/407253125\) | \(101813281250000\) | \([2]\) | \(5760\) | \(1.4331\) | \(\Gamma_0(N)\)-optimal |
1900.a2 | 1900a2 | \([0, 1, 0, 22092, 5579188]\) | \(298091207216/3525390625\) | \(-14101562500000000\) | \([2]\) | \(11520\) | \(1.7797\) |
Rank
sage: E.rank()
The elliptic curves in class 1900a have rank \(0\).
Complex multiplication
The elliptic curves in class 1900a do not have complex multiplication.Modular form 1900.2.a.a
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 Cremona 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 Cremona labels.