#12876: Fix element and parent classes of Hom categories to be abstract, and
simplify the Hom logic.
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Reporter: nthiery | Owner: nthiery
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.4
Component: categories | Resolution:
Keywords: categories, Hom | Work issues: add commit message
to one patch
Report Upstream: N/A | Reviewers: Simon King
Authors: Nicolas M. Thiéry | Merged in:
Dependencies: #11521, #12215, #12313 | Stopgaps:
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Comment (by SimonKing):
Here is the problem with removing the nasty alias:
{{{
sage: A.<a,b> = PowerSeriesRing(QQ)
sage: A._is_category_initialized()
False
sage: isinstance(A,Ring)
True
}}}
Hence, apparently `Ring.__init__` is not called on `PowerSeriesRing`.
That's nasty, but I think in order to make any progress it would be better
to leave that to a different ticket.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12876#comment:72>
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