Fixed points of the evacuation of maximal chains on Fuss shapes

淡江大學機構典藏 > 理學院 > 數學學系暨研究所 > 期刊論文 > Item 987654321/115407

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题名:	Fixed points of the evacuation of maximal chains on Fuss shapes
作者:	Sen-Peng Eu;Tung-Shan Fu;Hsiang-Chun Hsu;Yu-Pei Huang
关键词:	Evacuation;Stembridge's q=-1 phenomenon;Fixed point;Partition
日期:	2018-02-28
上传时间:	2018-10-25 12:11:01 (UTC+8)
摘要:	For a partition λ of an integer, we associate λ with a slender poset P the Hasse diagram of which resembles the Ferrers diagram of λ. Let X be the set of maximal chains of P. We consider Stanley's involution ϵ:X→X, which is extended from Schützenberger's evacuation on linear extensions of a finite poset. We present an explicit characterization of the fixed points of the map ϵ:X→X when λ is a stretched staircase or a rectangular shape. Unexpectedly, the fixed points have a nice structure, i.e., a fixed point can be decomposed in half into two chains such that the first half and the second half are the evacuation of each other. As a consequence, we prove anew Stembridge's q=−1phenomenon for the maximal chains of P under the involution ϵ for the restricted shapes.
關聯:	The Electronic Journal of Combinatorics 25(1), p1-33
显示于类别:	[數學學系暨研究所] 期刊論文

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