#19269: add category Posets to ZZ and QQ
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Reporter: dkrenn | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-6.9
Component: categories | Resolution:
Keywords: | Merged in:
Authors: Daniel Krenn | Reviewers:
Report Upstream: N/A | Work issues:
Branch: u/dkrenn/cat/ZZ- | Commit:
poset | c1d0720cc0b80041c8fdda8c85ec89bc031749ae
Dependencies: | Stopgaps:
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Comment (by dkrenn):
Replying to [comment:6 vdelecroix]:
> Having so many category for `ZZ` might also be a problem when it comes
to morphisms. What should be
> {{{
> sage: Hom(ZZ,ZZ)
> sage: Hom(ZZ^2, ZZ^2)
> }}}
> In the category of `Euclidean domains + Posets` there are few elements!
And most of the time, when people think about `ZZ^2` they do not care
about the poset structure. Something likethe following should work out of
the box
> {{{
> sage: Hom(ZZ^2, ZZ^2, Posets())
> sage: Hom(ZZ^2, ZZ^2, Modules(ZZ))
> }}}
> My question is about the default behavior of `Hom` with this multiple
categories.
What would be a solution to this or what are possible scenarios? What can
we do to get this ticket (make ZZ and QQ posets) towards a positive
review?
--
Ticket URL: <http://trac.sagemath.org/ticket/19269#comment:12>
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