On Pattern Avoiding Flattened Set Partitions

Let Π = B1/B2/… /Bk be any set partition of[n]= {1,2,...,n} satisfying that entries are increasing in each block and blocks are arranged in increasing order of their first entries.Then Callan defined the flattened Π to be the permutation of[n]obtained by erasing the divers between its blocks,and Cal...

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Veröffentlicht in:	Acta mathematica Sinica. English series 2015-12, Vol.31 (12), p.1923-1928
Hauptverfasser:	Liu, Thomas Y. H., Zhang, Andy Q.
Format:	Artikel
Sprache:	eng
Schlagworte:	extended Mathematical models Mathematics Mathematics and Statistics Studies Theorems 分区 平坦 扁平化 潜水员 设置 集合划分 青少年
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