Properties

Label 885.a
Number of curves $2$
Conductor $885$
CM no
Rank $1$
Graph

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

Elliptic curves in class 885.a

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality
885.a1 885d2 \([0, 1, 1, -19330, -1040876]\) \(798806778238038016/10723864485\) \(10723864485\) \([]\) \(2000\) \(1.0675\)  
885.a2 885d1 \([0, 1, 1, -280, 1684]\) \(2436396322816/44803125\) \(44803125\) \([5]\) \(400\) \(0.26282\) \(\Gamma_0(N)\)-optimal

Rank

sage: E.rank()
 

The elliptic curves in class 885.a have rank \(1\).

Complex multiplication

The elliptic curves in class 885.a do not have complex multiplication.

Modular form 885.2.a.a

sage: E.q_eigenform(10)
 
\(q - 2 q^{2} + q^{3} + 2 q^{4} + q^{5} - 2 q^{6} - 2 q^{7} + q^{9} - 2 q^{10} - 3 q^{11} + 2 q^{12} - q^{13} + 4 q^{14} + q^{15} - 4 q^{16} + 3 q^{17} - 2 q^{18} - 5 q^{19} + O(q^{20})\) 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.

\(\left(\begin{array}{rr} 1 & 5 \\ 5 & 1 \end{array}\right)\)

Isogeny graph

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

The vertices are labelled with LMFDB labels.