#18175: Implement categories for topological and metric spaces and related
categories
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Reporter: tscrim | Owner: tscrim
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: categories | Resolution:
Keywords: geometry, | Merged in:
topology, sd67 | Reviewers: Eric Gourgoulhon
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | f6fdd7ddad7fdbef37e7632d628f432891e76acc
public/categories/topological_metric_spaces-18175| Stopgaps:
Dependencies: #18174 #17160 |
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Comment (by tscrim):
Replying to [comment:61 egourgoulhon]:
> I've merged the last commit of this ticket in all the tickets of #18528,
replacing the `Sets()` category by `Manifolds(K)`,
`Manifolds(K).Differentiable()` or `Manifolds(K).Smooth()`, with `K`=`RR`,
`QQ`, `Qp(5)` or `CC`. Everything works well!
That's very good to hear!
> I've just one last question:
>
> In the examples (in `src/sage/categories/examples/manifolds.py` and
`src/sage/categories/examples/cw_complexes.py`), the parents implement the
method `an_element` and not `_an_element_` (as advised in the Parent
section of the reference manual). Is there any reason for this?
The reason we have `_an_element_` was for caching before there was an
`@cached_method`. It is sufficient to implement `an_element`, especially
for example classes. However, I can change if it you feel I should.
> and three suggestions of typo corrections
All done (and some other pyflakes cleanup).
--
Ticket URL: <http://trac.sagemath.org/ticket/18175#comment:63>
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