#14732: Realize a poset as a graph
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Reporter: chrisjamesberg | Owner: sage-combinat
Type: enhancement | Status: closed
Priority: major | Milestone: sage-5.11
Component: combinatorics | Resolution: fixed
Keywords: FindStatDays01 | Work issues:
Report Upstream: N/A | Reviewers: Travis Scrimshaw, Christian
Stump
Authors: Chris Berg | Merged in: sage-5.11.beta2
Dependencies: | Stopgaps:
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Comment (by ncohen):
Yo !
> Just to say, of course we did it because it is useful for Findstat (you
can name it, it's not forbidden).
I thought I named it several time, and I did not want to avoid it. I just
wanted to make clear that find_stat is a project which is totally distinct
from Sage, and so we have no reason to change our software for it.
> But I don't see how it affects anything in anyway for users and how it
is bad in anyway for Sage. I actually think it it makes it better, because
I for example would never think of doing Graph(P.hasse_diagram()) to
transform the Poset into a Graph.
....
Oh.
Well, if this is really the problem you want to solve perhaps you could
have tried to make this work instead :
{{{
sage: P = posets.RandomPoset(5,.1)
sage: Graph(P)
}}}
Much more natural, don't you think ?
> The fact that you know it because you usually work with this object
doesn't mean everyone knows this.
That's not my point. "Make a Graph from a poset" means nothing in the
first place, a poset is not a graph and several graphs would make sense.
The Hasse Diagram istelf, or its undirected version, or the transitive
closure, or the undirected version of it.
What I mean is that you really add a function there "because you want a
function from Posets to Graphs, whatever it is".
Besides I just noticed that as I asked during the talk you gave, this
combinatorial_map thing actually replaces each function it touches by a
class. And so Sage computes stuff when a users runs code that are ONLY
USEFUL for you f******** website.
That's bad work.
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14732#comment:15>
Sage <http://www.sagemath.org>
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