Contraction and restriction of positroids in terms of decorated permutations
Combinatorics
2013-11-26 v3
Abstract
A positroid is a matroid defined by Postnikov to study the cells in the non-negative part of the Grassmannian. They are in bijection with decorated permutations. We show a way to explain contraction and restriction of positroids in terms of decorated permutations.
Cite
@article{arxiv.0804.0882,
title = {Contraction and restriction of positroids in terms of decorated permutations},
author = {Suho Oh},
journal= {arXiv preprint arXiv:0804.0882},
year = {2013}
}
Comments
Major overhaul for readability, submitted to Annals of Combinatorics