On Thu, Dec 4, 2008 at 1:48 PM, Alex Raichev <[EMAIL PROTECTED]> wrote: > > Thanks for your help, Carl. Where did you find the documentation for > the command number_field_elements_from_algebraics(c)?
I'm guessing Carl knew about that command since he implemented it. Typing sage: help(sage.rings.qqbar) in Sage is pretty helpful too. > Yes, i'd find it very useful to have ideal and variety > computations over QQbar implemented. I don't have the know-how or the > time at present to do this myself, but i am learning more about Sage > every day and my next job might support this endeavor more than my > present one. So perhaps in the future i can work on this. > > Alex Awesome. I hope you get said next job! -- William > > On Dec 4, 9:31 am, Carl Witty <[EMAIL PROTECTED]> wrote: >> On Nov 30, 1:27 pm, Alex Raichev <[EMAIL PROTECTED]> wrote: >> >> > > It would be helpful if you could give a more concrete example, e.g., a >> > > session >> > > where you have some elements, and finally want to do something with them. >> >> > That's good idea, William. Let me back up to and change my question >> > to a more fundamental one. How does one compute in QQbar with Sage? >> > For example, how about factoring a polynomial, computing a radical >> > ideal, or computing a variety (see below)? I get the same error for >> > all these: "no conversion of this ring to a Singular ring defined". >> >> > Alex >> >> None of these things are implemented for polynomials over QQbar; and >> as far as I know there are no plans to implement them. >> >> Simpler variants of a couple of your problems are implemented: >> >> For univariate polynomials, you can find the roots with .roots >> (ring=QQbar), and it's trivial to compute the factorization from >> there. >> >> You can compute the variety (over QQbar) of a zero-dimensional ideal >> of polynomials with rational coefficients, using .variety(ring=QQbar). >> >> It would be great to have more functionality implemented for >> polynomials over QQbar; is that something you would be interested in >> contributing? >> >> Carl > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@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-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
