On Mon, Nov 3, 2008 at 7:06 PM, Bill Hart <[EMAIL PROTECTED]> wrote: > > sage: R.<x>=RDF['t']
This first line is wrong. It should be R.<t> = RDF[] or R.<t> = PolynomialRing(RDF) or R.<t> = RDF['t'] As is, you've made the polynomial ring that prints its variable as t but is referred to as x. Here's something similar. age: R.<x> = QQ['t'] sage: x t Who knows what you defined the t to be that you're using above? I don't. William > sage: s=1.0e1*t^3+1.0e-100*t^2+1.01234e-100*t+1.0e1 > sage: u=1.0e1*t^3-1.0e1*t^2+1.0e1*t-1.0e1 > sage: s*u > 100.0*t^6 - 100.0*t^5 + 100.0*t^4 - 100.0*t^2 + 100.0*t - 100.0 > > What happened to the t^3 term? > > Bill. > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
