It includes this probably bad idea --- "Often, tree-walkers would prefer to see divisions instead of multiplications and negative exponents"
which means that a programmer may have to write the same code twice. Example: Once for exp(-x) and once for 1/exp(x). or for 2^(-x), or even 2^n for possibly negative n. RJF On Friday, November 17, 2017 at 3:24:20 AM UTC-8, Eric Gourgoulhon wrote: > > Le dimanche 12 novembre 2017 16:04:38 UTC+1, Eric Gourgoulhon a écrit : >> >> >> Yes for sure, I will rewrite it using the expression tree walker, but in >> another ticket. >> > > This is now #24232 <https://trac.sagemath.org/ticket/24232>. This ticket > rebases all simplifications in calculus on manifolds on direct > manipulations of the expression tree, by subclassing ExpressionTreeWalker > <http://doc.sagemath.org/html/en/reference/calculus/sage/symbolic/expression_conversions.html#sage.symbolic.expression_conversions.ExpressionTreeWalker>. > > > > Eric. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
