#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_review
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:
--------------------------------------------------------+-------------------
Comment (by nthiery):
Replying to [comment:18 SimonKing]:
> Another point: I had inserted a comment in #11521, namely "Apparently
_Hom_ is supposed to be cached." This is why I did not insert stuff in the
(weak) cache.
>
> Do you lift that assumption? Then, we should see what _Hom_ methods
actually do caching. They should at most do ''weak'' caching.
Yes: I consider that all the caching logic should be in Hom; in particular
the _Hom_ methods should not do caching (and if I recall correctly, they
currently don't). We should probably add a note about this in the
documentation of Hom.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12876#comment:28>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
