#19615: interval-posets in Tamari again : hash and plot
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Reporter: | Owner:
chapoton | Status: needs_review
Type: | Milestone: sage-7.0
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
combinatorics | Work issues:
Keywords: | Commit:
Authors: | e1e2da07ed921acedcc7a6f2b0b28551a3f851da
Frédéric Chapoton | Stopgaps:
Report Upstream: N/A |
Branch: |
u/chapoton/19615 |
Dependencies: |
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Comment (by chapoton):
Replying to [comment:9 jmantysalo]:
> Replying to [comment:8 chapoton]:
>
> > Yes indeed, I just moved the cordinate-computing code. It should not
have changed anything in the view method results. You may want to check
that the latex pictures before and after the ticket are the same. You can
get examples to look at from the `list(TamariIntervalPosets(5))` for
instance.
>
> I did not test, but I tested with `dot2tex` installed and after `T =
TamariIntervalPosets(6)` I got different pictures from `T[1350].plot()`
and `T[1350]._latex_()`. Like one blue and two red lines missing. Node
positioning is the same. Maybe you have tested only without `dot2tex`?
(Compare for example to #18936 that has same kind of problem.)
ok, damn. I had checked on smaller examples, and the pictures were the
same.
I think one could simply add a warning/explanation that the pictures are
different:
* the plot is the Hasse diagram of the poset, with two colors for
increasing/decreasing covers
* the view is the union of two Hasse diagrams of the increasing forest and
decreasing forest.
Would you agree with this solution ?
--
Ticket URL: <http://trac.sagemath.org/ticket/19615#comment:10>
Sage <http://www.sagemath.org>
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