Maxima does have an unknown answer for comparisons. I'm in favour of the exception.
On Wednesday, 9 April 2008 19:18:48 UTC-7, Carl Witty wrote: > > I'd like to reopen discussion of #2781, "bool() for SymbolicEquation > should raise an error when it doesn't know the answer". Jason created > a prototype patch to implement this, but gave up on it and closed the > ticket when he was convinced that "this is not pythonic". > > I like the "raise an exception" behavior, because it would eliminate > questions asking why form1 and form2 below are different (from this > sage-support thread > http://groups.google.com/group/sage-support/browse_thread/thread/79d0d6d94cfe9526#). > > > (I have seen this exact problem at least twice on sage-support.) What > do you think? > > f(x)=x; > def g(x): > if (x>=0): > return f(x) > else: > return f(-x); > > show(plot(g(x),(x,-1,1))) #form1 > show(plot(g,-1,1)) #form2 > > Carl > -- 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 http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
