Properties

Label 540.a
Number of curves $2$
Conductor $540$
CM no
Rank $1$
Graph

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

Elliptic curves in class 540.a

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality
540.a1 540d2 \([0, 0, 0, -513, -4563]\) \(-5267712/125\) \(-354294000\) \([]\) \(324\) \(0.42679\)  
540.a2 540d1 \([0, 0, 0, 27, -27]\) \(6912/5\) \(-1574640\) \([3]\) \(108\) \(-0.12251\) \(\Gamma_0(N)\)-optimal

Rank

sage: E.rank()
 

The elliptic curves in class 540.a have rank \(1\).

Complex multiplication

The elliptic curves in class 540.a do not have complex multiplication.

Modular form 540.2.a.a

sage: E.q_eigenform(10)
 
\(q - q^{5} - 4 q^{7} + 6 q^{11} - 4 q^{13} - 3 q^{17} - 7 q^{19} + O(q^{20})\) 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.