#8148: looking at the dual of a poset: IndexError
-----------------------------+----------------------------------------------
Reporter: jhpalmieri | Owner: sage-combinat
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.2
Component: combinatorics | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-----------------------------+----------------------------------------------
In Sage 4.3.2.alpha0:
{{{
sage: Q = Poset({1: [], 3: [], 2: [1, 3]})
sage: Q.show() # works fine
sage: Q.dual().show()
...
IndexError: list index out of range
}}}
Note that the following works, and is what I'm using in my code right now:
{{{
sage: Poset(Q.hasse_diagram().reverse()).show()
}}}
Actually, though, this fails if Q is defined instead to be
{{{
sage: Q = Poset({1: [], 2: [1]})
sage: Q.show() # works fine, although the picture looks a little funny
sage: Poset(Q.hasse_diagram().reverse()).show()
...
RuntimeError: Error building image
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8148>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
