2009/4/27 Alex Ghitza <aghi...@gmail.com>: > > Weird. This does not happen on my laptop (32-bit arch linux -- you > didn't think I would put up a patch without doctesting did you? :)
Of course not! > > But I am definitely getting this on sage.math. I'll try to see what I > can do about it. thanks. As I said, my debugging attempt hit a dead end. John > > Alex > > > > On Mon, Apr 27, 2009 at 9:20 PM, John Cremona <john.crem...@gmail.com> wrote: >> >> This looks pretty nasty: >> >> sage: Fx.<b>=GF(2^(4*5)) >> sage: Ex=EllipticCurve(Fx,[0,0,1,1,1]) >> sage: Ex.defining_polynomial() >> x^3 + y^2*z + 0*x*z^2 + 0*y*z^2 + 0*z^3 >> >> (note the coefficients of zero). >> >> I found this while reviewing #5765 but the above is in a vanilla >> 3.4.2.alpha0, and it is wrong; though this was only revealed by #5765 >> which changed the method for verifying that a point lies on a curve >> from something which uses the a-invariants directly to a general >> scheme function which uses the defining polynomial. This causes >> elliptic_curves/ell_point.py to fail. So the bug might have been >> around for a while. >> >> John >> > > > -- > Alex Ghitza -- Lecturer in Mathematics -- The University of Melbourne > -- Australia -- http://www.ms.unimelb.edu.au/~aghitza/ > > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
