Linear relations of refined enumerations of alternating sign matrices
Abstract
In recent papers we have studied refined enumerations of alternating sign matrices with respect to a fixed set of top and bottom rows. The present paper is a first step towards extending these considerations to alternating sign matrices where in addition a number of left and right columns are fixed. The main result is a simple linear relation between the number of alternating sign matrices where the top row as well as the left and the right column is fixed and the number of alternating sign matrices where the two top rows and the bottom row is fixed. This may be seen as a first indication for the fact that the refined enumerations of alternating sign matrices with respect to a fixed set of top and bottom rows as well as left and right columns can possibly be reduced to the refined enumerations where only a number of top and bottom rows are fixed. For the latter numbers we provide a system of linear equations that conjecturally determines them uniquely.
Keywords
Cite
@article{arxiv.1008.0527,
title = {Linear relations of refined enumerations of alternating sign matrices},
author = {Ilse Fischer},
journal= {arXiv preprint arXiv:1008.0527},
year = {2010}
}