# Properties

 Label 227430ey Number of curves $2$ Conductor $227430$ CM no Rank $0$ Graph # Related objects

Show commands for: SageMath
sage: E = EllipticCurve("227430.b1")

sage: E.isogeny_class()

## Elliptic curves in class 227430ey

sage: E.isogeny_class().curves

LMFDB label Cremona label Weierstrass coefficients Torsion structure Modular degree Optimality
227430.b2 227430ey1 [1, -1, 0, -14175, -657639]  537600 $$\Gamma_0(N)$$-optimal
227430.b1 227430ey2 [1, -1, 0, -227925, -41825889]  1075200

## Rank

sage: E.rank()

The elliptic curves in class 227430ey have rank $$0$$.

## Modular form 227430.2.a.b

sage: E.q_eigenform(10)

$$q - q^{2} + q^{4} - q^{5} - q^{7} - q^{8} + q^{10} - 4q^{11} + 2q^{13} + q^{14} + q^{16} + 2q^{17} + O(q^{20})$$

## 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. 