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SageMath
E = EllipticCurve("i1")
E.isogeny_class()
Elliptic curves in class 1680.i
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
1680.i1 | 1680o1 | \([0, -1, 0, -5, 0]\) | \(1048576/525\) | \(8400\) | \([2]\) | \(96\) | \(-0.55421\) | \(\Gamma_0(N)\)-optimal |
1680.i2 | 1680o2 | \([0, -1, 0, 20, -20]\) | \(3286064/2205\) | \(-564480\) | \([2]\) | \(192\) | \(-0.20764\) |
Rank
sage: E.rank()
The elliptic curves in class 1680.i have rank \(0\).
Complex multiplication
The elliptic curves in class 1680.i do not have complex multiplication.Modular form 1680.2.a.i
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.