ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 03 Nov 2021 23:01:57 +0100- Isogeny from Two Curveshttps://ask.sagemath.org/question/49950/isogeny-from-two-curves/ Hi, I was wondering given two curves $E_1,E_2$ $\ell$-isogeneous where $\ell$ is some prime. Do we have anything in Sage that help us compute its itermediate isogeny?Sun, 16 Feb 2020 17:52:13 +0100https://ask.sagemath.org/question/49950/isogeny-from-two-curves/
- Comment by rburing for <p>Hi, I was wondering given two curves $E_1,E_2$ $\ell$-isogeneous where $\ell$ is some prime. Do we have anything in Sage that help us compute its itermediate isogeny?</p>
https://ask.sagemath.org/question/49950/isogeny-from-two-curves/?comment=49965#post-id-49965[Also asked on Math.StackExchange](https://math.stackexchange.com/questions/3548452/compute-kernel-polynomial-given-isogeneous-curve).Tue, 18 Feb 2020 14:03:42 +0100https://ask.sagemath.org/question/49950/isogeny-from-two-curves/?comment=49965#post-id-49965
- Answer by Luca for <p>Hi, I was wondering given two curves $E_1,E_2$ $\ell$-isogeneous where $\ell$ is some prime. Do we have anything in Sage that help us compute its itermediate isogeny?</p>
https://ask.sagemath.org/question/49950/isogeny-from-two-curves/?answer=59585#post-id-59585`E1.isogeny(E2, ell)` works if the isogeny between E1 and E2 is a VĂ©lu isogeny, but there is nothing for the general case.Wed, 03 Nov 2021 23:01:57 +0100https://ask.sagemath.org/question/49950/isogeny-from-two-curves/?answer=59585#post-id-59585