#10667: Morphisms and Objects of Categories
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Reporter: SimonKing | Owner: nthiery
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.0
Component: categories | Keywords: objects morphisms
containment
Work_issues: Cartesian products | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138, #11115
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Comment(by SimonKing):
Helas.
I fixed the Cartesian products, but now I have a couple of hundred errors
in elliptic curves. The problem is that non-unique parents occur in
`sage.libs.singular.ring.singular_ring_new` when constructing a
multivariate polynomial ring over a number field.
I have no idea why that problem is invisible without my patch.
It seems that this ticket is a can of worms. I will keep the current bug
fixes in my patch (sorry that I didn't submit it yet), but from now on new
bug fixes will give rise to new tickets.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10667#comment:44>
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