#15278: Hash and equality for graphs
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: Simon King | Reviewers: Nathann Cohen
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/SimonKing/ticket/15278 | 51d63284da70ffa4772a0d0fda6020750aef2e6d
Dependencies: #12601, #15491 | Stopgaps:
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Comment (by ncohen):
Yoooooooooo !
> but I can confirm the errors in c3_controlled. Strange! Why did this not
happen earlier? Can you identify a ticket that has been merged into
Sage-6.1.beta2 and has to do with linear extensions?
Hmmmm... Well, I'd think that it is a Poset-related ticket, since all the
linear_extension stuff seems to break. And well, it looks like I am
responsible for the Poset stuff that got merged since 6.0:
{{{
~/sage/combinat$ git log --oneline --merges d --author Release ^6.0 .
5dc0fb6 Trac #15332: Poset.lt computes too much
4254523 Trac #15330: Poset.is_chain is wrong
576167b Trac #15055: minor cleanup in incidence structures
dadfe61 Trac #14770: Alternating sign matrix transformations
aaaf103 Trac #13872: Non-exceptional rigged configuration bijections
7066356 Trac #15065: clean up the doc of fast_callable
59f05bd Trac #15479: Finite Words should be proud of their finiteness
4859012 Trac #15405: Implement the six vertex model
c04a8de Trac #15185: Clean up interface to the PARI library
69b08fa Trac #15391: Implementing the Foata bijection on permutations
f570a54 Trac #15372: Alternating sign matrix lattice will not plot.
e603630 Trac #15503: DegreeSequences(n) returns false positive
85a23f3 Trac #15480: Words.__eq__ returns wrong answers
092c6f9 Trac #15313: is_linear_extension on posets is rather liberal
e201dcd Trac #15473: Minor fixes to symmetric functions
3125f9f Trac #15467: Partitions return wrong result for obvious reasons
ee684c1 Trac #15340: Bug in chord_and_tangent
}}}
{{{
~/sage/combinat$ git log --oneline --merges d --author Release ^6.0
posets/
5dc0fb6 Trac #15332: Poset.lt computes too much
4254523 Trac #15330: Poset.is_chain is wrong
092c6f9 Trac #15313: is_linear_extension on posets is rather liberal
ee684c1 Trac #15340: Bug in chord_and_tangent
}}}
(`d` is my `develop` branch).
But #15322 only simplifies code, and #15330 is a bugfix. Actually, I don't
even understand how any of that could be related to the specific feature
you implemented. Nobody should be calling that code. It may be related to
#15313, who knows ? It is a bugfix too.
`Poset.is_linear_extension([1,2,3,4])` could return True even if 4 is not
contained in the Poset, and the patch fixes it `:-/`
And #15340 looks totally unrelated.
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/15278#comment:60>
Sage <http://www.sagemath.org>
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