On Sep 25, 6:40 pm, Bill Hart <[EMAIL PROTECTED]> wrote: > I still have a question about how one computes an approximate > polynomial for a + b for algebraic a and b, given approximate > polynomials for a and b, using interval arithmetic.
I don't. :-) There are several possible representations for an algebraic real in my code. An algebraic real can be a rational number, it can be a particular root (selected by giving an interval containing the root) of a polynomial with algebraic coefficients, or it can be the sum, difference, product, or quotient of algebraic reals. So the representation for a+b, with algebraic a and b, is a+b. Carl --~--~---------~--~----~------------~-------~--~----~ 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://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
