#19397: Add support for homogeneous components of a filtered module
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.10
Component: categories | Resolution:
Keywords: | Merged in:
Authors: Travis Scrimshaw | Reviewers: John Palmieri
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/categories/homogeneous_components-19397|
f89275b059b5dee1488feee46090596c157615c0
Dependencies: #17096 | Stopgaps:
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Changes (by tscrim):
* cc: SimonKing (added)
Comment:
I can also reproduce this by just running the tests on
`modules_with_basis.py`.
I tried the same hack on #15536 and I got errors. To the extreme, I made
the prime check on the input for `Zmod` and removed the category
refinement, and I ''still'' got errors.
I am strongly inclined to believe that it is not an issue with category
refinement, but instead something is wrong with how the category MRO is
being constructed. I would want to simultaneously fix for both #15536 and
this, but I'm fairly convinced they are different issues.
Yet another data point. I created a separate class and file for the new
category, and then set `FiniteDimensionalModulesWithBasis.Filtered` to
this new class (also now inheriting from `FilteredModulesCategory` by
following what `GradedHopfAlgebrasWithBasis` does). This now does not set
the correct category as
{{{
sage: (ModulesWithBasis(ZZ).Filtered().FiniteDimesnional()
....: != ModulesWithBasis(ZZ).FiniteDimesnional().Filtered())
False
}}}
This is on `u/tscrim/test-19397`.
I have absolutely no idea what is going on. I would appreciate some
comments from those that implemented how the category code handles these
things.
--
Ticket URL: <http://trac.sagemath.org/ticket/19397#comment:20>
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