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SageMath
E = EllipticCurve("a1")
E.isogeny_class()
Elliptic curves in class 55440a
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
55440.g2 | 55440a1 | \([0, 0, 0, -12423, -544122]\) | \(-30676050095472/751953125\) | \(-5197500000000\) | \([2]\) | \(81920\) | \(1.2251\) | \(\Gamma_0(N)\)-optimal |
55440.g1 | 55440a2 | \([0, 0, 0, -199923, -34406622]\) | \(31963054227773868/18528125\) | \(512265600000\) | \([2]\) | \(163840\) | \(1.5717\) |
Rank
sage: E.rank()
The elliptic curves in class 55440a have rank \(1\).
Complex multiplication
The elliptic curves in class 55440a do not have complex multiplication.Modular form 55440.2.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.