How to find the normal form of an elliptic curve using Sage?

asked 2018-08-02 17:54:08 +0100

anonymous user

Anonymous

Let $C$ be the following curve in $\mathbb{C}^2$. \begin{align} & 11664 {c_1}^3 {c_2}^2 + 536544 {c_1}^3 c_2 + 6170256 {c_1}^3 + 67068 {c_1}^2 {c_2}^2 + 1542564 {c_1}^2 c_2 \ & + 3085128 c_1 {c_2}^2 - 32393844 c_1 c_2 + 3085128 c_1 + 17739486 {c_2}^2 + 6941538 c_2 = 0. \end{align} I checked that this curve has genus $1$ using Sage. Therefore it is an elliptic curve. How to change coordinates such that the equation of this curve is of the form $y^2 = f(x)$, where $f$ is some polynomial. Thank you very much.

I tried to use the following codes in Sage.

R.<c1,c2> = QQ[]; Jacobian(11664c1^3c2^2 + 536544c1^3c2 + 6170256c1^3 + 67068c1^2c2^2 + 1542564c1^2c2 + 3085128c1c2^2 - 32393844c1c2 + 3085128c1 + 17739486c2^2 + 6941538c2)

But there is an error: NoEmbeddingError: not a sub-polytope of a reflexive polygon. How to find the normal form of the curve using Sage? Thank you very much.

edit retag flag offensive close merge delete

Comments

The code posted should be indented in order to prevent * from being interpreted a markdown formatting. But if I fix the multiplications then I get the same exception. I have no idea what it means in this case though.

Iguananaut gravatar imageIguananaut ( 2018-08-13 12:23:29 +0100 )edit