#10668: Refactor category support for morphisms (Hom is not a functorial
construction!)
--------------------------+-------------------------------------------------
Reporter: nthiery | Owner: nthiery
Type: defect | Status: new
Priority: major | Milestone:
Component: categories | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
--------------------------+-------------------------------------------------
Comment(by SimonKing):
A technical question:
For things to work, it is needed that
`Fields().hom_category().parent_class` inherits from
`Rings().hom_category().parent_class`.
I thought that the inheritance would be provided by the category
framework, if we have
`Fields().hom_category().is_subcategory(Rings().hom_category())` (which, I
guess, is mathematically correct). Unfortunately, even though I arranged
things so that indeed
`Fields().hom_category().is_subcategory(Rings().hom_category())`, I still
get no inheritance of the parent classes.
So, how can one inherit the parent class of a super-category?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10668#comment:11>
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 post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
