Properties

Label 23104a
Number of curves $2$
Conductor $23104$
CM \(\Q(\sqrt{-19}) \)
Rank $1$
Graph

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

Elliptic curves in class 23104a

sage: E.isogeny_class().curves
 
LMFDB label Cremona label Weierstrass coefficients j-invariant Discriminant Torsion structure Modular degree Faltings height Optimality CM discriminant
23104.bc2 23104a1 \([0, 0, 0, -152, 722]\) \(-884736\) \(-438976\) \([]\) \(2880\) \(-0.0035751\) \(\Gamma_0(N)\)-optimal \(-19\)
23104.bc1 23104a2 \([0, 0, 0, -54872, -4952198]\) \(-884736\) \(-20652012657856\) \([]\) \(54720\) \(1.4686\)   \(-19\)

Rank

sage: E.rank()
 

The elliptic curves in class 23104a have rank \(1\).

Complex multiplication

Each elliptic curve in class 23104a has complex multiplication by an order in the imaginary quadratic field \(\Q(\sqrt{-19}) \).

Modular form 23104.2.a.a

sage: E.q_eigenform(10)
 
\(q + q^{5} + 3 q^{7} - 3 q^{9} + 5 q^{11} - 7 q^{17} + O(q^{20})\) 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.

\(\left(\begin{array}{rr} 1 & 19 \\ 19 & 1 \end{array}\right)\)

Isogeny graph

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

The vertices are labelled with Cremona labels.