中文

Demazure 特征(关键多项式)及其原子的半标准 tableau

组合数学 2017-07-11 v3

摘要

由至多 nn 个部分的分区 λ\lambda 索引的 Schur 函数是形状为 λ\lambda 的 Young tableau 的权重单项式之和。设 π\pi 为一个 nn-置换。我们给出了两种描述,用于刻画那些将其单项式贡献给由 π\piλ\lambda 索引的关键多项式的 tableau。(这些多项式是 GL(n)GL(n) 的 Demazure 模的特征。)由 π\pi 索引的“原子”是其右关键(right keys)为 π\pi 的“关键”tableau 的那些 tableau 的权重单项式之和。Schur 函数和关键多项式可以分解为原子之和。我们还描述了贡献于原子的 tableau、具有等于给定关键的左关键(left key)的 tableau,以及具有下界为给定关键的左关键的 tableau。

关键词

引用

@article{arxiv.1212.6789,
  title  = {Semistandard Tableaux for Demazure Characters (Key Polynomials) and Their Atoms},
  author = {Robert A. Proctor and Matthew J. Willis},
  journal= {arXiv preprint arXiv:1212.6789},
  year   = {2017}
}

备注

19 pages w/ 3 figures (1 new), 1 page with post-publication minor improvements. New title. This is the final pre-typesetting version of the European Journal of Combinatorics paper 43 (2015), 172-184. This v3 has many revisions and clarifications that were inspired by the referees' reports. These include Proposition 1.1, plus the added hypothesis for Theorem 3.2 and for Corollaries 10.2 and 10.6