#7581: use prCopyR to coerce multivariate polynomials in the simple case
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Reporter: malb | Owner: malb
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.3
Component: commutative algebra | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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Mike Hansen wrote on [sage-devel]:
The following messages are probably relevant for the fast conversion
between singular polynomial rings:
On Sat, Oct 18, 2008 at 2:55 AM, Michael Brickenstein
<[email protected]> wrote:
> In Singular the same thing is essentially done from the > interpreter
> level by the more general command fetch.
> I had a look, what it does internally and came to the conclusion,
> that it just calls
> poly prCopyR(poly p, ring src_r, ring dest_r)
> in your simple case (same coefficient domains).
> So first, you should setup a new ring and
> then map the polynomial via
> prCopyR
>
> Michael
On Mon, Oct 20, 2008 at 8:43 PM, <[email protected]> wrote:
> if the monomial ordering is really the same,
> you may also use
> poly prCopyR_NoSort(poly p, ring src_r, ring dest_r)
> which avoids the sorting the polynomial after mapping each monomial.
> There are also corresponding routines for ideals
> (ideal idrCopyR(ideal id, ring src_r, ring dest_r),
> ideal idrCopyR_NoSort(ideal id, ring src_r, ring dest_r)
> )
>
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7581>
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