Some design comments: sage: R.<x,y,z> = QQ[] > sage: f = 3*y^2*x-y^2*z-2*x*y*z+y*z^2+2*x^3-2*x^2*z > sage: e = EllipticCurve_from_cubic(f,[0,0,1]) > sage: e > Scheme morphism: ... > This is not ideal naming. The command reads like you'd be asking for an elliptic curve, but a morphism is returned in its place. Sure, via e.codomain() the elliptic curve can be retrieved too, but shouldn't the routine be named ellipticcurve_transformation_from_cubic instead, or something like that?
sage: e.inverse() The inverse is there because it's explicitly included upon creation (that's good!). It would be nice to have a routine to compute the inverse just from the equations as well, though. Similarly, it would be nice to have routines that return birational maps to Weierstrass forms for other (all ?) cases of genus 1 curves with a point. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
