English

Young tableau descriptions for the polyhedral realizations of crystal bases in type $A_n$

Representation Theory 2026-05-12 v1 Combinatorics

Abstract

By utilizing the combinatorial properties of various tableau models, we establish an explicit correspondence between the polyhedral realizations of the crystal bases B(λ)\mathcal B(\lambda) (resp. B()\mathcal B(\infty)) of type AnA_n and the reverse semi-standard Young tableaux (resp. reverse marginally large tableaux), thereby providing a combinatorial description of the corresponding polyhedral realizations. Furthermore, a crystal structure on the set of Gelfand-Tsetlin patterns is obtained via the correspondence between the polyhedral realization of B(λ)\mathcal{B}(\lambda) and the reverse tableaux. As applications of our framework, we present concrete combinatorial realizations of the crystal embedding of B(λ)\mathcal B(\lambda) into B()\mathcal B(\infty) and the set of Lusztig data.

Keywords

Cite

@article{arxiv.2605.08602,
  title  = {Young tableau descriptions for the polyhedral realizations of crystal bases in type $A_n$},
  author = {Shaolong Han},
  journal= {arXiv preprint arXiv:2605.08602},
  year   = {2026}
}