Polyhedral realizations for crystal bases and Young walls of classical affine types
Quantum Algebra
2024-03-05 v1 Combinatorics
Representation Theory
Abstract
For affine Lie algebra of type , , , , , or , let and be the crystal bases of integrable highest weight representation and negative part of quantum group . We consider the polyhedral realizations of crystal bases, which realize and as sets of integer points of some polytopes and cones in . It is a natural problem to find explicit forms of the polytopes and cones. In this paper, we introduce pairs of truncated walls, which are defined as modifications of level -Young walls and describe inequalities defining the polytopes and cones in terms of level -proper Young walls and pairs of truncated walls. As an application, we also give combinatorial descriptions of -functions on in terms of Young walls and truncated walls.
Keywords
Cite
@article{arxiv.2403.01190,
title = {Polyhedral realizations for crystal bases and Young walls of classical affine types},
author = {Yuki Kanakubo},
journal= {arXiv preprint arXiv:2403.01190},
year = {2024}
}
Comments
45 pages