#9138: Categories for all rings
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Reporter: jbandlow | Owner: nthiery
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7
Component: categories | Keywords: introspection,
categories for rings
Author: Simon King | Upstream: N/A
Reviewer: | Merged:
Work_issues: Categories for more rings... |
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Comment(by nthiery):
Replying to [comment:50 SimonKing]:
> I see. So, I can not provide `QuotientRing` with the category of
quotients of the category of the ambient ring.
Yup. E.g. the quotient of an algebra A by a vector space I is just a
vector space. But if I is an ideal, more can be said. So the logic to
determine this piece of mathematical information is non trivial, and often
one is better off just specifying it explicitly.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9138#comment:51>
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