#10903: Update Singular to 3-1-2 or higher
------------------------+---------------------------------------------------
Reporter: malb | Owner: tbd
Type: defect | Status: needs_info
Priority: critical | Milestone: sage-4.7.2
Component: packages | Keywords: singular SageDays34 sd34
Work_issues: | Upstream: N/A
Reviewer: | Author: Burcin Erocal, Martin Albrecht
Merged: | Dependencies: #11339
------------------------+---------------------------------------------------
Comment(by malb):
Alright,
on my computer with
{{{
trac_11339_refcount_singular_rings.patch
trac_11339_refcount_singular_polynomials.patch
10903_singular-3-1-4.patch
}}}
I'm down to these two:
{{{
$ sage -t -long -force_lib
"devel/sage/sage/schemes/plane_conics/con_finite_field.py"
sage: assert
all([C.defining_polynomial()(Sequence(C.has_rational_point(point =
True)[1])) == 0 for C in c[r::5]]) # long time: 1.6 seconds
Exception raised:
...
TypeError: Coordinates [4, 4, 1] do not define a point on Projective Conic
Curve over Finite Field of size 5 defined by x*y + x*z + y*z + z^2
}}}
{{{
sage -t -long -force_lib
"devel/sage/sage/schemes/generic/algebraic_scheme.py"
sage: A.subscheme([x]) + A.subscheme([y^2 - (x^3+1)])
Expected:
Closed subscheme of Affine Space of dimension 2 over Rational Field
defined by:
-x^4 + x*y^2 - x
Got:
Closed subscheme of Affine Space of dimension 2 over Rational Field
defined by:
x^4 - x*y^2 + x
}}}
The latter doesn't look like a bug but an improvement actually.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10903#comment:25>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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