On Sat, Mar 8, 2008 at 4:23 PM, Simon King <[EMAIL PROTECTED]> wrote:
>
> Dear Team,
>
> now i can reproduce a very similar thing even on sage.math!
>
> -------------------------------------------------
>
> sage: R.<x> = QQ[]
> sage: f = x^3 + x + 1; g = x^3 - x - 1
> sage: r = f.resultant(g)
> sage: gap(ZZ)
> Integers
> sage: singular(R)
>
> sage: singular(R)
>
> // characteristic : 0
> // number of vars : 1
> // block 1 : ordering lp
> // : names x
> // block 2 : ordering C
> sage: singular(R).typeof()
>
> sage: singular(R).typeof()
>
> sage: singular(R).name()
> 'sage0'
> sage: singular('sage0')
>
> sage: singular('sage0')
>
> -----------------------------
>
> Hence:
> After gap(ZZ), the first singular(R) has empty output. The second and
> following calls of singular(R) have correct output. However,
> singular(R).typeof() repeatedly has empty output, and
> singular('sage0') is empty as well.
>
> So indeed the combination of resultant, gap and singular is a problem.
>
> Is that reproducible for you, or is it exclusive for my sage.math
> account?
I can reproduce this on sage.math but not my local machine.
>
>
>
> Yours
> Simon
>
>
> >
>
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