Properties

Label 490.a
Number of curves $2$
Conductor $490$
CM no
Rank $0$
Graph

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Show commands: SageMath
E = EllipticCurve("a1")
 
E.isogeny_class()
 

Elliptic curves in class 490.a

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality
490.a1 490c2 \([1, 0, 1, -7768, -458202]\) \(-8990558521/10485760\) \(-60448319733760\) \([]\) \(1764\) \(1.3385\)  
490.a2 490c1 \([1, 0, 1, 807, 11708]\) \(10100279/16000\) \(-92236816000\) \([3]\) \(588\) \(0.78918\) \(\Gamma_0(N)\)-optimal

Rank

sage: E.rank()
 

The elliptic curves in class 490.a have rank \(0\).

Complex multiplication

The elliptic curves in class 490.a do not have complex multiplication.

Modular form 490.2.a.a

sage: E.q_eigenform(10)
 
\(q - q^{2} - 2 q^{3} + q^{4} + q^{5} + 2 q^{6} - q^{8} + q^{9} - q^{10} + 3 q^{11} - 2 q^{12} - q^{13} - 2 q^{15} + q^{16} - 6 q^{17} - q^{18} - q^{19} + O(q^{20})\) 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 LMFDB numbering.

\(\left(\begin{array}{rr} 1 & 3 \\ 3 & 1 \end{array}\right)\)

Isogeny graph

sage: E.isogeny_graph().plot(edge_labels=True)
 

The vertices are labelled with LMFDB labels.