#19084: libSingular functions' ring parameter defaults to the last used ring
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Reporter: klee | Owner:
Type: enhancement | Status: new
Priority: minor | Milestone: sage-6.9
Component: interfaces | Keywords:
Merged in: | Authors: Kwankyu Lee
Reviewers: | Report Upstream: N/A
Work issues: | Branch: u/klee/libsingular
Commit: | Dependencies:
Stopgaps: |
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libSingular functions require a ring parameter set. But for some functions
the ring parameter is redundant.
Martin Albrecht answers to this issue:
We could do this:
- if no ring is given, we try to find one as we do currently.
- if that fails because the inputs are not polynomials of any kind, we
could use a dummy ring.
My own solution to this problem is to store the last used ring in
libSingular function calls, instead of using a dummy ring. In a Singular
function call, if a ring is not found from the arguments, then the ring
parameter defaults to the last used ring. The initial "last used" ring is
set to `PolynomialRing(QQ,2,'x,y')`.
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Ticket URL: <http://trac.sagemath.org/ticket/19084>
Sage <http://www.sagemath.org>
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