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SageMath
E = EllipticCurve("g1")
E.isogeny_class()
Elliptic curves in class 19890g
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
19890.i4 | 19890g1 | \([1, -1, 0, -2745, 11421]\) | \(3138428376721/1747933200\) | \(1274243302800\) | \([2]\) | \(24576\) | \(1.0131\) | \(\Gamma_0(N)\)-optimal |
19890.i2 | 19890g2 | \([1, -1, 0, -33165, 2329425]\) | \(5534056064805841/9890302500\) | \(7210030522500\) | \([2, 2]\) | \(49152\) | \(1.3597\) | |
19890.i1 | 19890g3 | \([1, -1, 0, -530415, 148819275]\) | \(22638311752145721841/72499050\) | \(52851807450\) | \([2]\) | \(98304\) | \(1.7063\) | |
19890.i3 | 19890g4 | \([1, -1, 0, -22635, 3826791]\) | \(-1759334717565361/7634341406250\) | \(-5565434885156250\) | \([2]\) | \(98304\) | \(1.7063\) |
Rank
sage: E.rank()
The elliptic curves in class 19890g have rank \(1\).
Complex multiplication
The elliptic curves in class 19890g do not have complex multiplication.Modular form 19890.2.a.g
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.