#7922: Categories for Weyl character rings and weight rings (was: pickling fails
in WeightRing)
-------------------------------------------+--------------------------------
Reporter: nthiery | Owner: bump
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7
Component: combinatorics | Keywords:
Author: Dan Bump, Nicolas M. Thiéry | Upstream: N/A
Reviewer: Nicolas M. Thiéry, Dan Bump | Merged:
Work_issues: |
-------------------------------------------+--------------------------------
Description changed by bump:
Old description:
> This ticket refactors the code of WeylCharacterRing and WeightRing to use
> categories and (combinatorial) free modules. Along the way, it adds a
> couple features (Dan: please list them here), and solves a pickling issue
> which was caught by #7921:
>
> {{{
> sage: A2 = WeylCharacterRing(['A',2])
> sage: a2 = WeightRing(A2)
> sage: TestSuite(a2).run()
> Failure in _test_element_pickling:
> Traceback (most recent call last):
> ...
> AssertionError: 2*a2(0,0,0) != 2*a2(0,0,0)
> }}}
>
> Indeed:
> {{{
> sage: x = a2.an_element()
> sage: x == loads(dumps(x))
> False
> }}}
>
> '''Apply''' [attachment: trac_7922-rebased-4.7.alpha2.patch]
>
> '''Remove''' the following pickles from the pickle jar:
>
> _class__sage_combinat_root_system_weyl_characters_WeightRing__.*
> _class__sage_combinat_root_system_weyl_characters_WeylCharacterRing_class__.*
> _class__sage_combinat_root_system_weyl_characters_WeylCharacter__.*
>
> '''Copy''' the contents of
> [attachment: trac_7922-new_pickles.tar.gz] into
> {{{data/ext_code/pickle_jar}}}.
New description:
This ticket refactors the code of WeylCharacterRing and WeightRing to use
categories and (combinatorial) free modules. Along the way, it adds a
couple features (Dan: please list them here), and solves a pickling issue
which was caught by #7921:
{{{
sage: A2 = WeylCharacterRing(['A',2])
sage: a2 = WeightRing(A2)
sage: TestSuite(a2).run()
Failure in _test_element_pickling:
Traceback (most recent call last):
...
AssertionError: 2*a2(0,0,0) != 2*a2(0,0,0)
}}}
Indeed:
{{{
sage: x = a2.an_element()
sage: x == loads(dumps(x))
False
}}}
'''Apply''' [attachment: trac_7922-rebased-4.7.alpha3.patch]
'''Remove''' the following pickles from the pickle jar:
{{{
_class__sage_combinat_root_system_weyl_characters_WeightRing__.*
_class__sage_combinat_root_system_weyl_characters_WeylCharacterRing_class__.*
_class__sage_combinat_root_system_weyl_characters_WeylCharacter__.*
}}}
'''Copy''' the contents of
[attachment: trac_7922-new_pickles.tar.gz] into
{{{data/ext_code/pickle_jar}}}.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7922#comment:14>
Sage <http://www.sagemath.org>
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