Re: [sage-combinat-devel] Le diagrams and permutation tableaux

2014-02-05 Thread Christian Stump
Thanks for your comments, Darij! My impression is that I also do not quite answer to your mail: What I would like to have: Given a partition \lambda (or something more general, even a BadShape without knowing what that is), I would like a class of all Le diagrams of shape \lambda. I.e., a class

Re: [sage-combinat-devel] Le diagrams and permutation tableaux

2014-02-05 Thread Darij Grinberg
Hi Christian, On Wed, Feb 5, 2014 at 4:15 PM, Christian Stump christian.st...@gmail.com wrote: Thanks for your comments, Darij! My impression is that I also do not quite answer to your mail: What I would like to have: Given a partition \lambda (or something more general, even a BadShape

[sage-combinat-devel] Le diagrams and permutation tableaux

2014-02-04 Thread Christian Stump
Hi there, I wonder if someone already has code for Postnikov's Le diagrams. These are fillings of partitions fitting in a box with 0's and 1's with the additional property that no 0 has a 1 in the same column AND to its left in the same row. My aim is to get Le diagrams (or maybe the subclass of

Re: [sage-combinat-devel] Le diagrams and permutation tableaux

2014-02-04 Thread Darij Grinberg
Hi Christian, I fear I'm going to derail this a bit but I actually care about hearing answers to these questions... The way you speak of Le-diagrams, they are fillings of partitions with 0's and 1's. But from a quick look at Postnikov's paper, it seems that they are better regarded as subsets of