On Wed, Jul 9, 2008 at 12:35 AM, Bill Page <[EMAIL PROTECTED]> wrote:
> *yixin.cao wrote:* -- In the light of polynomial, (2d) is a > non-zero polynomial, so that it's always safe to write (1/(2d)) > > If a value of 0 is subsituted for d in this "non-zero polynomial" > then in what sense is '1/(2d)' safe? This is the classical difference between a function (defined by a polynomial) and a polynomial. There is no doubt that -- if d is the unknown -- then 2d is a non-zero polynomial and as such has an inverse in the field Q(d). -- Gaby ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ open-axiom-devel mailing list open-axiom-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/open-axiom-devel
