On Wednesday, September 12, 2012 4:20:27 PM UTC+1, Jason Grout wrote: > I think matlab may automatically do the sort of abs(a-b)<eps thing that > Volker was talking about, since numbers are assumed to be floating point > in matlab.
Probably, and for a very confusing value of epsilon. Mathematica always does interval arithmetic, I think. Friendly to newcomers but slow and teaches bad habits for computing with floats. In Sage, I actually would prefer for interval arithmetic == to mean that intervals overlap. Right now it basically means "intervals are the same" which is pretty useless. But the application generally is: I have two approximate solutions, and I want to know if they are the same. Of course that would make == non-transitive, but so what? sage: RIF(1/10) + RIF(2/10) == RIF(3/10) False -- You received this message because you are subscribed to the Google Groups "sage-support" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support?hl=en.
