# Properties

 Label 121242bk Number of curves 2 Conductor 121242 CM no Rank 0 Graph # Related objects

Show commands for: SageMath
sage: E = EllipticCurve("121242.bp1")
sage: E.isogeny_class()

## Elliptic curves in class 121242bk

sage: E.isogeny_class().curves
LMFDB label Cremona label Weierstrass coefficients Torsion order Modular degree Optimality
121242.bp2 121242bk1 [1, 0, 0, -547, 20417] 2 184320 $$\Gamma_0(N)$$-optimal
121242.bp1 121242bk2 [1, 0, 0, -15067, 708665] 2 368640

## Rank

sage: E.rank()

The elliptic curves in class 121242bk have rank $$0$$.

## Modular form None

sage: E.q_eigenform(10)
$$q + q^{2} + q^{3} + q^{4} + 2q^{5} + q^{6} + 4q^{7} + q^{8} + q^{9} + 2q^{10} + q^{12} + 4q^{14} + 2q^{15} + q^{16} + 4q^{17} + q^{18} + 4q^{19} + O(q^{20})$$

## 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.

$$\left(\begin{array}{rr} 1 & 2 \\ 2 & 1 \end{array}\right)$$

## Isogeny graph

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

The vertices are labelled with Cremona labels. 