#10963: More functorial constructions
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Reporter: | Owner: stumpc5
nthiery | Status: needs_work
Type: | Milestone:
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers: Simon King
categories | Work issues: Reduce startup time by 5%. Avoid
Keywords: | "recursion depth exceeded (ignored)". Trivial
Authors: | doctest fixes.
Nicolas M. Thiéry | Dependencies: #11224, #8327, #10193, #12895,
Report Upstream: N/A | #14516, #14722, #13589
Branch: |
Stopgaps: |
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Comment (by SimonKing):
Replying to [comment:57 SimonKing]:
> After all, creating the join of a list of categories should be more
complicated then adding a list of "axiom categories" (such as
`Magmas().Commutative()` and `Magmas().Division()` and `Sets().Finite()`)
to a given category (such as `Rings()`).
Or perhaps rather `Rngs().Division()`, because we ask for inverses for all
non-zero elements, hence `Division()` requires a category that has a
notion of a zero and is at the same time a magma.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:58>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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