Show commands:
SageMath
E = EllipticCurve("bt1")
E.isogeny_class()
Elliptic curves in class 409101bt
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
409101.bt2 | 409101bt1 | \([1, 0, 1, -136491, -282253919]\) | \(-1349232625/164333367\) | \(-34250751478179129663\) | \([2]\) | \(6912000\) | \(2.4278\) | \(\Gamma_0(N)\)-optimal* |
409101.bt1 | 409101bt2 | \([1, 0, 1, -7340226, -7595485691]\) | \(209849322390625/1882056627\) | \(392262721661615299803\) | \([2]\) | \(13824000\) | \(2.7744\) | \(\Gamma_0(N)\)-optimal* |
Rank
sage: E.rank()
The elliptic curves in class 409101bt have rank \(1\).
Complex multiplication
The elliptic curves in class 409101bt do not have complex multiplication.Modular form 409101.2.a.bt
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.