#11900: Serious regression caused by #9138
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Reporter: SimonKing
| Owner: tbd
Type: defect
| Status: needs_work
Priority: critical
| Milestone: sage-4.8
Component: performance
| Keywords: categories regression
Work_issues: Laurent series rings are fields. Add docs. Don't use is_ring and
friends | Upstream: N/A
Reviewer: Jeroen Demeyer, Nicolas M. Thiéry
| Author: Simon King
Merged:
| Dependencies: #9138 #11911
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Comment(by SimonKing):
I really don't know. Do we want to properly initialise the category of a
polynomial quotient ring? If we do, then we also need to provide it with
implementations of `lift`, `ambient` and `retract`.
So, I see two options:
* Provide a polynomial quotient ring just with the category of
commutative algebras over its base field, so that the test suites pass for
now. Deal with a proper initialisation (adding lift, ambient, retract) as
`Algebras(base_ring).Quotients()` on a different ticket.
* Bloat this ticket up even more.
I prefer the first approach. I want to get this ticket finally off my
plate. I really need #9138, and the longer it has to wait, the worse.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:130>
Sage <http://www.sagemath.org>
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