#19364: Add edges() and endpoints() method to intervals
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/add_edges___method_to_rif_and_cif_elements|
388d495a093e551084e137f947e51ad74f6e0100
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:7 chapoton]:
> Strange order:
> {{{
> (lower left, upper right, upper left, lower right)
> }}}
> what is the reason of this choice ?
The rationale is the following: suppose you need 2 endpoints defining the
interval (i.e. such that the union is the whole interval). In that case,
those endpoints are `interval.endpoints()[:2]` both in the real and
complex case.
For the `edges()` method, I put pairs of opposing edges next to each
other, because an application might want to process such pairs of opposing
edges. The fact that the `endpoints()` method also returns pairs of
opposing endpoints is consistent with that.
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Ticket URL: <http://trac.sagemath.org/ticket/19364#comment:8>
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