[Date Index] [Thread Index] [Author Index]
Re: Error in Mathematica?
This is one of those that Nancy Blachman poses often in her talks. When you input x=b then x^2/.x->a, first MMA evals the x^2 to b^2, then it evals the x->a to b->a, then it applied the rule to get a^2. When you enter x=2 then x^2/.x->7, MMA first evals the x^2 to 2^2 to 4, then it applies the rule x->7. Of course, now there is no x remaining on the left of the slash-dot. Nancy Blachman's book, "Mathematica a Prectical Approach" has a number of examples of this sort of thing (at least, if I recall correctly, it does.) Ronald D. Notestine Faculty of Management Chukyo University Nagoya, Japan ronald at sccs.chukyo-u.ac.jp fax: 81-52-835-7196