This patch adds a method .twists() to elliptic curves over finite fields k, which computes a set of k-isomorphism representatives of the K-isomorphism class where K is the algebraic closure of k.

This can be useful, for instance, to compute a list of all elliptic curves defined over k up to k-isomorphism:

def all_curves(F):
    return [E for j in F for E in EllipticCurve(j=j).twists()]

CC: @JohnCremona @defeo

Component: elliptic curves

Authors: Lorenz Panny, John Cremona

Issue created by migration from https://trac.sagemath.org/ticket/34782