Two refined major-balance identities on 321-avoiding involutions

Sen Peng Eu; Tung Shan Fu; Yeh Jong Pan; Chien Tai Ting

doi:10.1016/j.ejc.2015.04.002

Two refined major-balance identities on 321-avoiding involutions

Sen Peng Eu
, Tung Shan Fu
, Yeh Jong Pan
, Chien Tai Ting

數學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

4 引文斯高帕斯（Scopus）

摘要

Making use of a combinatorial approach, we prove two refined major-balance identities on the 321-avoiding involutions in Sn, respecting the number of fixed points and the number of descents, respectively. The former one is proved in terms of ordered trees whose non-root nodes have exactly two children, and the latter one is proved in terms of lattice paths within a ⌊n2⌋×⌈n2⌉ rectangle.

原文	英語
頁（從 - 到）	250-264
頁數	15
期刊	European Journal of Combinatorics
卷	49
DOIs	https://doi.org/10.1016/j.ejc.2015.04.002
出版狀態	已發佈 - 2015 10月 1

ASJC Scopus subject areas

離散數學和組合

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10.1016/j.ejc.2015.04.002

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abstract = "Making use of a combinatorial approach, we prove two refined major-balance identities on the 321-avoiding involutions in Sn, respecting the number of fixed points and the number of descents, respectively. The former one is proved in terms of ordered trees whose non-root nodes have exactly two children, and the latter one is proved in terms of lattice paths within a ⌊n2⌋×⌈n2⌉ rectangle.",

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AB - Making use of a combinatorial approach, we prove two refined major-balance identities on the 321-avoiding involutions in Sn, respecting the number of fixed points and the number of descents, respectively. The former one is proved in terms of ordered trees whose non-root nodes have exactly two children, and the latter one is proved in terms of lattice paths within a ⌊n2⌋×⌈n2⌉ rectangle.

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Two refined major-balance identities on 321-avoiding involutions

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