Standard Young tableaux in a (2,1)-hook and Motzkin paths
Standard Young tableaux in a (2,1)-hook and Motzkin paths
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(2,1) 钩形路径和 Motzkin 路径中的标准 Young 画面
DOI:
10.1016/j.disc.2021.112395
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发表时间:
2021
影响因子:
0.8
通讯作者:
Yu Jingni
中科院分区:
文献类型:
--
作者:
Du Rosena R. X.;Yu Jingni
The enumeration of standard Young tableaux (SYTs) is a fundamental problem in combinatorics and representation theory. While counting SYTs of bounded height k is known for k at most 5 with combinatorial proofs, much less is known for counting SYTs in a (k, l)-hook. In 2009 Regev enumerated standard Young tableaux of order n that are contained in a (2, 1)-hook. By a recurrence relation and the WZ method he proved that this number is 1 2 (∑ j≥ 1 n j n− j j)+ 1. In this paper we give a combinatorial proof of Regev’s result by constructing a bijection between these tableaux and free Motzkin paths.