arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.2489math.CO
收藏

拟对称Schur函数

Quasisymmetric Schur functions

J. Haglund, K. Luoto, S. Mason, S. van Willigenburg

摘要:

我们引入了一个新的准对称函数的基础,这产生于专业化的非对称麦克唐纳多项式的标准基地,也被称为Demazure原子。我们的新基被称为拟对称Schur函数的基,因为基元素以自然的方式细化Schur函数。我们推导出的单式和基本的拟对称函数,从而产生的Kostka数和标准(反向)表的拟对称细化的拟对称Schur函数的扩展。从这里,我们得到一个Pieri规则的拟对称舒尔函数,自然细化Pieri规则舒尔函数。在调查组合公式麦克唐纳多项式,包括麦克唐纳多项式的基本拟对称函数的扩展,我们展示了我们的一些结果可以扩展到包括$t$参数从霍尔-利特尔伍德理论。

英文摘要:

We introduce a new basis for quasisymmetric functions, which arise from a specialization of nonsymmetric Macdonald polynomials to standard bases, also known as Demazure atoms. Our new basis is called the basis of quasisymmetric Schur functions, since the basis elements refine Schur functions in a natural way. We derive expansions for quasisymmetric Schur functions in terms of monomial and fundamental quasisymmetric functions, which give rise to quasisymmetric refinements of Kostka numbers and standard (reverse) tableaux. From here we derive a Pieri rule for quasisymmetric Schur functions that naturally refines the Pieri rule for Schur functions. After surveying combinatorial formulas for Macdonald polynomials, including an expansion of Macdonald polynomials into fundamental quasisymmetric functions, we show how some of our results can be extended to include the $t$ parameter from Hall-Littlewood theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑