#10716: Adding a weighted_degree function to Singular multivariate polynomials
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Reporter: jsrn | Owner: AlexGhitza
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.3
Component: algebraic | Resolution:
geometry | Merged in:
Keywords: multivariate | Reviewers: Marshall Hampton
polynomials,degree,Singular | Work issues:
Authors: Johan S. R. | Commit:
Nielsen, Luis Felipe Tabera | 1036282f26205edced3fe67a6ba8f5a8969feb59
Alonso | Stopgaps:
Report Upstream: N/A |
Branch: |
u/lftabera/weighted_degree |
Dependencies: |
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Comment (by malb):
Replying to [comment:20 lftabera]:
> I would not say that zero.degree() == -1 is a bug, but a feature.
I meant that it is returned as a Python int.
> The use of `int`s instead of `ZZ` is just for compatibility with the
current degree method. In both `MPolynomial_libsingular` and
`MPolynomial_polydict` polynomials the degree returns an `int`.
`MPolynomial_libsingular` can only represent a total degree `< INT_MAX`,
as far as I recall. Hence, using int there is fine. However, this function
accepts a weights array which may contain arbitrary integers. Hence, this
function can overflow, where `MPolynomial_libsingular.total_degree()`
cannot (as far as I can tell).
--
Ticket URL: <http://trac.sagemath.org/ticket/10716#comment:21>
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