#14019: equality is broken for Posets
-------------------------------------+-------------------------------------
Reporter: ncohen | Owner: sage-combinat
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: posets | Merged in:
Authors: Travis Scrimshaw, | Reviewers: Travis Scrimshaw,
Anne Schilling | Anne Schilling
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/combinat/poset/fix_equality-14019|
e575742951572b4b383abeae1e21e934b9e1683f
Dependencies: #17059 | Stopgaps: #14185
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Comment (by aschilling):
Replying to [comment:43 ncohen]:
> Positive review ? On my computer this code breaks a *LOT* of doctests in
the combinat folder.
They were all trivial failures and are fixed now!
>Also, I do not understand what you do in the .dual() function. You seem
to define a >elements variable that you do not use. As a result the dual
of a Poset with a linear >extension becomes a poset without linear
extension.
Fixed.
>Would it also be possible to change the __repr__ function so that is says
explicitly
>that the poset is a poset with a linear extension ? The two posets behave
as if they
>were of different type (they can never be equal), and if such a poset is
returned by a
>function it may surprise the user that the poset is never equal to a
poset he built
>himself.
If this is only for HIM, I am sure this is now in your ability range to
fix it, if it is important to you!
Anne
--
Ticket URL: <http://trac.sagemath.org/ticket/14019#comment:49>
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