Properties

Label 1785i
Number of curves $4$
Conductor $1785$
CM no
Rank $0$
Graph

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Show commands: SageMath
E = EllipticCurve("i1")
 
E.isogeny_class()
 

Elliptic curves in class 1785i

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality
1785.m4 1785i1 \([1, 0, 1, 41, -1123]\) \(7892485271/552491415\) \(-552491415\) \([2]\) \(768\) \(0.35706\) \(\Gamma_0(N)\)-optimal
1785.m3 1785i2 \([1, 0, 1, -1404, -19619]\) \(305759741604409/12646127025\) \(12646127025\) \([2, 2]\) \(1536\) \(0.70364\)  
1785.m1 1785i3 \([1, 0, 1, -22229, -1277449]\) \(1214661886599131209/2213451765\) \(2213451765\) \([2]\) \(3072\) \(1.0502\)  
1785.m2 1785i4 \([1, 0, 1, -3699, 60247]\) \(5595100866606889/1653777286875\) \(1653777286875\) \([2]\) \(3072\) \(1.0502\)  

Rank

sage: E.rank()
 

The elliptic curves in class 1785i have rank \(0\).

Complex multiplication

The elliptic curves in class 1785i do not have complex multiplication.

Modular form 1785.2.a.i

sage: E.q_eigenform(10)
 
\(q + q^{2} + q^{3} - q^{4} - q^{5} + q^{6} - q^{7} - 3 q^{8} + q^{9} - q^{10} - q^{12} + 6 q^{13} - q^{14} - q^{15} - q^{16} - q^{17} + q^{18} + 4 q^{19} + O(q^{20})\) Copy content Toggle raw display

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.