On Jul 17, 2:58 pm, David Harvey <[EMAIL PROTECTED]> wrote: > I don't have time to debug this now, but I want to mention that > it sounds suspiciously similar to this ticket: > > http://sagetrac.org/sage_trac/ticket/2943
It certainly does. (I probably should have filtered the tickets with "power series" instead of just "polynomial" when I was looking through them.) The main difference seems to be that in the the present case, the base ring of the polynomial ring is exact, though the polynomial ring in question is "derived" from the inexact power series ring used in the calculation of the formal group law. Anyway, I get something that works if I remove the bit in the patch in ticket 2943 that uses the old way of determining "__nonzero__-ness" for exact base rings (i.e. now the code says a polynomial is __nonzero__ if all its coefficients are nonzero, instead of checking if the list of coefficients is non-empty). Cheers, Hamish. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
