On Tue, 18 May 2010 12:21:57 -0700 (PDT), John Cremona <john.crem...@gmail.com> wrote: > > I think it is a bug. > sage: p.prec() > 1 > sage: p(t).prec() > +Infinity > sage: p(t^2).prec() > +Infinity > > The precision of the composite is not being computed correctly. I > hope someone more familiar with the power series code will jump in at > this point.
This type of thing has been noticed before (a couple of times!), see http://trac.sagemath.org/sage_trac/ticket/3979 http://trac.sagemath.org/sage_trac/ticket/5367 I guess it might be time to fix these :) Best, Alex -- Alex Ghitza -- http://aghitza.org/ Lecturer in Mathematics -- The University of Melbourne -- Australia -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org