The operator formula for monotone triangles - simplified proof and three generalizations
Combinatorics
2009-03-27 v1
Abstract
We provide a simplified proof of our operator formula for the number of monotone triangles with prescribed bottom row, which enables us to deduce three generalizations of the formula. One of the generalizations concerns a certain weighted enumeration of monotone triangles which specializes to the weighted enumeration of alternating sign matrices with respect to the number of -1s in the matrix when prescribing as the bottom row of the monotone triangle.
Keywords
Cite
@article{arxiv.0903.4628,
title = {The operator formula for monotone triangles - simplified proof and three generalizations},
author = {Ilse Fischer},
journal= {arXiv preprint arXiv:0903.4628},
year = {2009}
}