On 10/1/07, John Cremona <[EMAIL PROTECTED]> wrote:
>
> This came into the LiDIA mailing list (which I have been on for
> years).  Would there be a positive response possible from Sage at this
> point?
>

If "Z_q" below means "GF(p)" for p a prime, then you can tell him that
Sage is faster at arithmetic in GF(p)[x,y,...] than any other program in
existence...  If it is the Witt vectors, then no.  If it is is Z/qZ
with q composite,
no.

William

> John
>
> ---------- Forwarded message ----------
> From: Steffen Reidt <[EMAIL PROTECTED]>
> Date: 1 Oct 2007 14:21
> Subject: [LiDIA] multivariate polynomials
> To: LIDIA <[EMAIL PROTECTED]>
>
>
> Hi all,
>
> I have recently installed the LiDIA library and I am quite happy with
> it. Nice docu and examples. Now I need to implement some multivariate
> polynomials over Z_q in at least 6 variables. According to the
> documentation and a brief google search, LiDIA provides no direct
> functionality for multivariate polynomials. For efficiency and the
> avoidance of headaches I am not keen on a recursive implementation such
> as P(x,y) = P1(P2(x)). If anybody knows a good solution for the problem
> or has some code available that would be really great.
>
> Cheers, Steffen
>
> _______________________________________________
> LiDIA mailing list
> [EMAIL PROTECTED]
> http://www.cdc.informatik.tu-darmstadt.de/mailman/listinfo/lidia
>
>
> --
> John Cremona
>
> >
>


-- 
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org

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