Show commands:
SageMath
E = EllipticCurve("cm1")
E.isogeny_class()
Elliptic curves in class 13650cm
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
13650.cn4 | 13650cm1 | \([1, 0, 0, 162, 26292]\) | \(30080231/19110000\) | \(-298593750000\) | \([2]\) | \(18432\) | \(0.88091\) | \(\Gamma_0(N)\)-optimal |
13650.cn3 | 13650cm2 | \([1, 0, 0, -12338, 513792]\) | \(13293525831769/365192100\) | \(5706126562500\) | \([2, 2]\) | \(36864\) | \(1.2275\) | |
13650.cn2 | 13650cm3 | \([1, 0, 0, -28588, -1127458]\) | \(165369706597369/60703354530\) | \(948489914531250\) | \([2]\) | \(73728\) | \(1.5741\) | |
13650.cn1 | 13650cm4 | \([1, 0, 0, -196088, 33405042]\) | \(53365044437418169/41984670\) | \(656010468750\) | \([2]\) | \(73728\) | \(1.5741\) |
Rank
sage: E.rank()
The elliptic curves in class 13650cm have rank \(1\).
Complex multiplication
The elliptic curves in class 13650cm do not have complex multiplication.Modular form 13650.2.a.cm
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.
\(\left(\begin{array}{rrrr} 1 & 2 & 4 & 4 \\ 2 & 1 & 2 & 2 \\ 4 & 2 & 1 & 4 \\ 4 & 2 & 4 & 1 \end{array}\right)\)
Isogeny graph
sage: E.isogeny_graph().plot(edge_labels=True)
The vertices are labelled with Cremona labels.