有限Young格对称链分解的视觉方法
A visual approach to symmetric chain decompositions of finite Young lattices
AI总结:
本文通过将有限Young格的序结构等价于膨胀单纯形格点的自然序及类型$A_n$根系统的权图,提出一种视觉方法,并完全图示描述了$L(3, n)$的对称链分解。
摘要:
有限Young格$L(m, n)$是秩对称、秩单峰的,且具有强Sperner性质。R. Stanley进一步猜想$L(m, n)$允许对称链序。我们证明$L(m, n)$上的序结构等价于膨胀$n$-单纯形格点上的自然序,这又对应于类型$A_n$根系统的权图。Lindström对$L(3, n)$的对称链分解通过图片被完全描述。
英文摘要:
The finite Young lattice $L(m, n)$ is rank-symmetric, rank-unimodal, and has the strong Sperner property. R. Stanley further conjectured that $L(m, n)$ admits a symmetric chain order. We show that the order structure on $L(m, n)$ is equivalent to a natural ordering on the lattice points of a dilated $n$-simplex, which in turn corresponds to a weight diagram for the root system of type $A_n$. Lindstr{\" o}m's symmetric chain decompositions for $L(3, n)$ are described completely through pictures.
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。