#12876: Fix element and parent classes of Hom categories to be abstract, and
simplify the Hom logic.
--------------------------------------------------------+-------------------
Reporter: nthiery | Owner:
nthiery
Type: enhancement | Status:
needs_work
Priority: major | Milestone:
sage-5.1
Component: categories | Resolution:
Keywords: categories, Hom | Work issues: Fix
ring_refcount_dict problem
Report Upstream: N/A | Reviewers: Simon
King
Authors: Nicolas M. Thiéry | Merged in:
Dependencies: #715, #11521, #12875, #12877, #12215 | Stopgaps:
--------------------------------------------------------+-------------------
Changes (by SimonKing):
* status: needs_review => needs_work
Comment:
Too bad. "make testlong" resulted in
{{{
sage -t --long -force_lib "devel/sage/sage/categories/map.pyx"
**********************************************************************
File
"/mnt/local/king/SAGE/stable/sage-5.0.beta13/devel/sage/sage/categories/map.pyx",
line 382:
sage: phi.category()
Expected:
Category of hom sets in Category of rings
Got:
Category of hom sets in Category of sets
**********************************************************************
File
"/mnt/local/king/SAGE/stable/sage-5.0.beta13/devel/sage/sage/categories/map.pyx",
line 388:
sage: f.category()
Expected:
Join of Category of hom sets in Category of rings and Category of hom
sets in Category of modules over Rational Field
Got:
Category of hom sets in Category of modules over Rational Field
**********************************************************************
}}}
and
{{{
sage -t --long -force_lib "devel/sage/sage/categories/homset.py"
**********************************************************************
File
"/mnt/local/king/SAGE/stable/sage-5.0.beta13/devel/sage/sage/categories/homset.py",
line 228:
sage: Hom(PA,PJ).category()
Expected:
Join of Category of hom sets in Category of rings and Category of hom
sets in Category of modules over Rational Field
Got:
Category of hom sets in Category of modules over Rational Field
**********************************************************************
File
"/mnt/local/king/SAGE/stable/sage-5.0.beta13/devel/sage/sage/categories/homset.py",
line 339:
sage: End(QQ).category()
Expected:
Category of hom sets in Category of rings
Got:
Category of hom sets in Category of sets
}}}
I have sage-5.0.beta13 plus #715, #11521, #12875, #12877, #12215 and
#12876.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12876#comment:31>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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