#16507: Better handling of subspace construction in pushout
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Reporter: pbruin | Owner:
Type: defect | Status: needs_review
Priority: minor | Milestone: sage-6.4
Component: categories | Resolution:
Keywords: pushout subspace, | Merged in:
sd59 | Reviewers:
Authors: Peter Bruin | Work issues:
Report Upstream: N/A | Commit:
Branch: | 1e75320fbe3cbc7d0b639f789aa0c0ef71cad746
u/pbruin/16507-pushout_coercion_reversed| Stopgaps:
Dependencies: |
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Comment (by pbruin):
Replying to [comment:4 jj]:
> What about the discussion we had on sage-devel / the example 1.1 + x^2
I was planning to come back to this, but I'm currently slightly busy
(moving house)...
> I liked the suggestion of doing a coercion check for exceptional cases.
> That would however involve applying/evaluating (part of) the functor
prematurely
> (which is not necessarily wrong/bad).
Yes, but as you say it is not a bad thing; in the end we have to apply the
"merged" functor anyway, so the consequence of this coercion checking is
just that the logic becomes a little bit more complicated.
If you feel like implementing this, feel free to go ahead; I'm not sure if
I'll have enough time very soon.
--
Ticket URL: <http://trac.sagemath.org/ticket/16507#comment:5>
Sage <http://www.sagemath.org>
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