2021-01-28 15:53:44 +0100 | received badge | ● Notable Question (source) |

2020-01-01 19:57:51 +0100 | received badge | ● Popular Question (source) |

2015-09-28 19:54:58 +0100 | received badge | ● Scholar (source) |

2015-09-28 15:41:27 +0100 | commented answer | Compute $j$-invariant of elliptic curve in non-Weierstrass form with arbitrary coefficients Looks good, thanks a lot! |

2015-09-28 14:35:53 +0100 | received badge | ● Student (source) |

2015-09-28 12:53:15 +0100 | asked a question | Compute $j$-invariant of elliptic curve in non-Weierstrass form with arbitrary coefficients One can compute the $j$-invariant of an elliptic curve not in Weierstrass form in Sage via the following (where the curve $ x+x^2+y-x^2y-xy^2+x^2y^2=0 $ -- not in Weierstrass form -- is used as an example): If we include numerical coefficients of the various terms, this still works. However, I would like Sage to compute the j-invariant of such curves in non-Weierstrass form with arbitrary coefficients, e.g. $ax+bx^2+cy-dx^2y-exy^2+fx^2y^2$. Is this possible? I tried including the line: But got an error. Can anyone help? Thanks! |

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.