#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
public/ticket/10963 | Commit:
Dependencies: #11224, #8327, | 8045aa4a4b7ada735b3eb6055382f9b341a39f1e
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506 |
-------------------------------------+-------------------------------------
Comment (by vbraun):
I agree with Nils, but imho that is just another way of spelling out the
problem. What does adding the ''Finite'' axiom actually mean if I want to
apply it to a category that I'm using/writing? I can guess that it gives
me a `is_finite()` method returning `True`, but confusingly that is
implemented in some category. Anything else? How can I use code
introspection (one of Pythons absolute strong points) to find out what is
going on? I can't, because all I got is this string to represent the
axiom. Axioms should be **code** (classes) with some protocol for how they
are used to enrich categories.
Slightly related, I don't like the `_base_category_class_and_axiom`
attribute. A heterogeneous list with some convention to treat the first
element special is a terrible data structure. Just split it up into
`_base_category_class` and `_axioms`.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:383>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/groups/opt_out.
