On Aug 1, 6:52 pm, Eviatar <eviatarb...@gmail.com> wrote: > This is now #11643,http://trac.sagemath.org/sage_trac/ticket/11643.
A little experimenting (see ticket) shows that Maxima itself does not keep track of precision in its bigfloats. Any computation (including just adding two numbers!) will just produce a bigfloat with precision as set by "fpprec". This even happens when adding two bigfloats with lower precision. In short, while maxima's bigfloats carry precision information with them, this is not taken into account in computations. If we want maxima's floats to act nicely with sage's precision model, we'd have to scan the expression for mpfr objects, figure out from that a reasonable precision, set fpprec to that and do the maxima computation. In your original example, you'd have to set "fpprec" to 200*ln(2)/ ln(10). -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
