#17173: Poset: faster is_distributive_lattice
-------------------------------------+-------------------------------------
Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Jori Mäntysalo | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/poset__faster_is_distributive_lattice|
d69e73a0a0a655e4e1595a77cda807ccb017fb02
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by jmantysalo):
Replying to [comment:8 ncohen]:
> Hello !
>
> > In other words: If `G.vertices()` prints `..., a, ..., b, ...`, can it
after `D.delete_edges(...)` print `..., b, ..., a, ...`? If not, is this
guaranteed behaviour in following versions of Sage?
>
> Hmmmmm... If the vertex set consists of integers this will not happens,
but is that really a problem ? You can also store and manage the list of
vertices yourself. Or rename the set of points.
Hasse diagram has always integers `0,...,n-1` as labels. But I don't quite
get this: if I write code that manages list of vertex labels, I am doing
code that posets code already does.
Actually I think that I will start discussion about this on sage-devel.
--
Ticket URL: <http://trac.sagemath.org/ticket/17173#comment:9>
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 unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
