#17680: bug in Singulars factorize()
-------------------------+-------------------------------------------------
Reporter: | Owner:
jakobkroeker | Status: new
Type: defect | Milestone: sage-6.5
Priority: minor | Keywords: Singular
Component: packages: | Authors:
standard | Report Upstream: Fixed upstream, in a later
Merged in: | stable release.
Reviewers: | Branch:
Work issues: | Dependencies:
Commit: |
Stopgaps: |
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failing example:
{{{
sage: R.<a,r,v,n,g,f,h,o>=QQ[]
sage: f =
248301045*a^2*r^10*n^2*o^10+570807000*a^2*r^9*n*o^9-137945025*a^2*r^8*n^2*o^8+328050000*a^2*r^8*o^8-253692000*a^2*r^7*n*o^7+30654450*a^2*r^6*n^2*o^6-109350000*a^2*r^6*o^6+42282000*a^2*r^5*n*o^5-3406050*a^2*r^4*n^2*o^4-22457088*a*r^2*v*n^2*o^6+12150000*a^2*r^4*o^4-3132000*a^2*r^3*n*o^3+189225*a^2*r^2*n^2*o^2+2495232*a*v*n^2*o^4-450000*a^2*r^2*o^2+87000*a^2*r*n*o-4205*a^2*n^2;
sage: factors = factor(f);
sage: len(factors) # 3, expected 4
sage: factor(factors[1][0])
(3*r*o - 1) * (3*r*o + 1)
}}}
corresponding upsteam report:
http://www.singular.uni-kl.de:8002/trac/ticket/659
This bug is fixed in Singular 4.0.1
--
Ticket URL: <http://trac.sagemath.org/ticket/17680>
Sage <http://www.sagemath.org>
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