Show commands:
SageMath
E = EllipticCurve("a1")
E.isogeny_class()
Elliptic curves in class 105a
sage: E.isogeny_class().curves
LMFDB label | Cremona label | Weierstrass coefficients | j-invariant | Discriminant | Torsion structure | Modular degree | Faltings height | Optimality |
---|---|---|---|---|---|---|---|---|
105.a3 | 105a1 | \([1, 0, 1, -3, 1]\) | \(1771561/105\) | \(105\) | \([2]\) | \(4\) | \(-0.85911\) | \(\Gamma_0(N)\)-optimal |
105.a2 | 105a2 | \([1, 0, 1, -8, -7]\) | \(47045881/11025\) | \(11025\) | \([2, 2]\) | \(8\) | \(-0.51254\) | |
105.a1 | 105a3 | \([1, 0, 1, -113, -469]\) | \(157551496201/13125\) | \(13125\) | \([2]\) | \(16\) | \(-0.16596\) | |
105.a4 | 105a4 | \([1, 0, 1, 17, -37]\) | \(590589719/972405\) | \(-972405\) | \([4]\) | \(16\) | \(-0.16596\) |
Rank
sage: E.rank()
The elliptic curves in class 105a have rank \(0\).
Complex multiplication
The elliptic curves in class 105a do not have complex multiplication.Modular form 105.2.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.
\(\left(\begin{array}{rrrr} 1 & 2 & 4 & 4 \\ 2 & 1 & 2 & 2 \\ 4 & 2 & 1 & 4 \\ 4 & 2 & 4 & 1 \end{array}\right)\)
Isogeny graph
sage: E.isogeny_graph().plot(edge_labels=True)
The vertices are labelled with Cremona labels.