#10667: Morphisms and Objects of Categories
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Reporter: SimonKing | Owner: nthiery
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.0
Component: categories | Keywords: objects
morphisms containment
Work_issues: Cope with non-unique number fields | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138,
#11115, #11780
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Comment(by nthiery):
Replying to [comment:60 SimonKing]:
> But it would be possible to have a custom
`NumberFields().HomCategory.ParentMethods`, similar to the custom
`Rings().HomCategory.ParentMethods`.
>
> While `Rings().hom_category().parent_class` with my patch inherits from
`UniqueRepresentation` and (via classcall) from either
`sage.rings.homset.RingHomset_generic` or
`sage.rings.homset.RingHomset_quo_ring`, one could have
`NumberFields().hom_category().parent_class` inherit from
`sage.rings.number_field.morphism.NumberFieldHomset`, but not from
`UniqueRepresentation`.
Sound good.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10667#comment:63>
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