#21100: division error in normalize_coordinates
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Reporter: bhutz | Owner:
Type: defect | Status: positive_review
Priority: minor | Milestone: sage-
Component: algebraic | duplicate/invalid/wontfix
geometry | Resolution:
Keywords: | Merged in:
Authors: | Reviewers: Ben Hutz
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* status: needs_review => positive_review
* author: Ben Hutz =>
* branch: u/bhutz/division_error_in_normalize_coordinates =>
* commit: 88f76f9966e0df58b539a12205f4fb221972796a =>
* reviewer: Vincent Delecroix => Ben Hutz
Old description:
> When the gcd is a multivariate polynomial, it does not cancel upon
> scaling
>
> {{{
> R.<a,b>=QQ[]
> P.<x,y,z>=ProjectiveSpace(R,2)
> H=End(P)
> f=H([a*(x+y)*x^2,b*(x+y)*y^2,(x+y)*z^2])
> f.normalize_coordinates()
> }}}
>
> This division can be done through maxima
New description:
Note: This ticket is now superseded by #21108.
When the gcd is a multivariate polynomial, it does not cancel upon scaling
{{{
R.<a,b>=QQ[]
P.<x,y,z>=ProjectiveSpace(R,2)
H=End(P)
f=H([a*(x+y)*x^2,b*(x+y)*y^2,(x+y)*z^2])
f.normalize_coordinates()
}}}
This division can be done through maxima
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Ticket URL: <https://trac.sagemath.org/ticket/21100#comment:22>
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