#10963: More functorial constructions
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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, | eb7b486c6fecac296052f980788e15e2ad1b59e4
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506 |
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Comment (by pbruin):
Replying to [comment:465 nthiery]:
> Replying to [comment:450 pbruin]:
> > Maybe the quickest solution is to insert better-named aliases for
these, rename the method `summands()` introduced here, and later deprecate
`summand_projection()` and `summand_split()` in a different ticket.
> >
> > My first reflex would be to rename `summand_projection()` to
`projection()` and `summand_split()` to `tuple()`.
>
> If you believe this is urgent enough to belong to #10963, then please
> go ahead, and I'll review it.
Not sure if 'urgent' is the right word, but it would be better to give
method the right name from the start rather than using a less-than-ideal
name for consistency with other less-than-ideal names...
> To raise any confusion: I mean that if you construct a monoid M as a
> cartesian product of other monoids, you would get a `M.factors()`
> method which would have nothing to do with the concept of
> factorization in the monoid M.
I see. How about
{{{
summand_projection() -> cartesian_projection()
summand_split() -> cartesian_factors()
summands() -> cartesian_factors()
}}}
In particular, the fact that the last two are equal would be nicely
consistent with the fact that we already have `cartesian_product()` both
for parents and for elements.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:474>
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