#11935: Make parent/element classes independent of base rings
---------------------------+------------------------------------------------
Reporter: SimonKing | Owner: nthiery
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.8
Component: categories | Keywords: parent class, element class,
category
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138 #11900 #11943
---------------------------+------------------------------------------------
Changes (by SimonKing):
* status: needs_work => needs_review
* work_issues: introduce _make_named_class =>
Old description:
> At #11900 and [http://groups.google.com/group/sage-combinat-
> devel/browse_thread/thread/99c74827d704e677 sage-combinat-devel], as well
> as in some comments in sage/categories/category.py, the idea was
> discussed to make, for example,
> `Algebras(GF(3)).parent_class==Algebras(GF(5)).parent_class` - hence,
> make the parent/element classes as independent from the base of a
> category as possible.
>
> Apply [attachment:trac11935_weak_pickling_by_construction_rel11943.patch]
New description:
At #11900 and [http://groups.google.com/group/sage-combinat-
devel/browse_thread/thread/99c74827d704e677 sage-combinat-devel], as well
as in some comments in sage/categories/category.py, the idea was discussed
to make, for example,
`Algebras(GF(3)).parent_class==Algebras(GF(5)).parent_class` - hence, make
the parent/element classes as independent from the base of a category as
possible.
__Apply__
* [attachment:trac11935_weak_pickling_by_construction_rel11943.patch]
* [attachment:trac11935_named_class.patch]
--
Comment:
I have implemented the new method `_make_named_class` (with "strong
pickling by construction" for Category and "weak pickling by construction"
for `CategoryWithParameters`). For me, all tests pass.
And, for the record:
{{{
sage: %time L = EllipticCurve('960d1').prove_BSD()
CPU times: user 2.88 s, sys: 0.04 s, total: 2.92 s
Wall time: 3.06 s
}}}
Apply trac11935_weak_pickling_by_construction_rel11943.patch
trac11935_named_class.patch
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11935#comment:38>
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