Salut Nicolas,
I was just brainstorming of how to use PairwiseCompatibleSubsets to
construct not only antichains but also chains and multichains in
posets. It might be a good optional argument fixing a given size, or
fixing a given maximal size of subsets. chains of a given length then
become stra
> There is also a bug to fix in HasseDiagram. Maybe I add another patch
> after 10998, that's easier to review then...
I added another patch doing this after 10998, its number is 11187.
I like the facade option for posets, I use it in the finite reflection
group code for constructing the noncross
> Otherwise I would change this and add it to my review patch...
There is also a bug to fix in HasseDiagram. Maybe I add another patch
after 10998, that's easier to review then...
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Salut Nicolas,
I was just creating some lattices and saw that LatticePoset does not
take the same input as Poset. Have you touched the patch these days?
Otherwise I would change this and add it to my review patch...
Best, Christian
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Hi Florent,
>
> I was on a long week end and Nicolas is on vacation for the entire week. So
> expect some delay in the answers.
>
No worries! We're not in a hurry.
> First of all the dictionary approach as you call it is very classical in
> combinatorics. It think it is a good idea here. We use t
Salut,
I just pushed a new version of the patch implementing finite
reflection groups - it is now also on the trac server with ticket
number #11187.
It contains many of the suggestions you made - including various
possibilities of indexing (generating, distinguished, all)
reflections. Also, every
Hello Florent,
There are 20 lines at the begining of the patch
improve_constructors_of_iet-vd.patch
which modify permutation.py (the __init__ method). See the following thread
http://groups.google.com/group/sage-combinat-devel/browse_thread/thread/354f6e841ae5cc58
Cheers,
Vincent
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Hi,
I don't know if you intend to touch it but I have a modification in
sage/groups/perm_gps/permgroup_element.pyx
I had the following method:
cpdef list _act_on_list_on_position(self, list x):
"""
Returns the right action of ``self`` on the list ``x``. This is the
action on positi
On Tue, Apr 12, 2011 at 02:26:41AM -0700, Nathann Cohen wrote:
>
> >
> > - use a much more compact and memory efficient C/Cython data structure;
> > - allows to cythonize efficiently all the small methods;
> >
> If you need some reviews on this kind of tickets, count me in ! :-)
Cool !
Florent
