Generalized (P, w)-partitions and generating functions for trees

Generalized (P, w)-partitions and generating functions for trees
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树的广义 (P, w) 划分和生成函数

DOI:
10.1016/s0097-3165(03)00091-8
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发表时间:
2003
期刊:
J. Comb. Theory A
影响因子:
--
通讯作者:
H. Tagawa
H. Tagawa
中科院分区:
--
文献类型:
--
作者:
Isao Arima;H. Tagawa

文献摘要

被引文献

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我们引入(P,R)-划分作为Stanley的(P,ω)-划分的推广.当P是一个高斯偏序集时,对于某些整数g(x),最大部分至多为n个因子的P-分拆的生成函数为<$x∈P1− qg(x)+n1−qg(x)。虽然树不是一般的高斯偏序集,我们表明,如果P是一棵树,那么R可以选择,使(P,R)-分区的生成函数有一个类似的分解。
We introduce (P,R)-partitions as a generalization of the (P,ω)-partitions of Stanley. When P is a Gaussian poset the generating function for P-partitions with largest part at most n factors as ∏x∈P1−qg(x)+n1−qg(x)for certain integers g(x). Although trees are not in general Gaussian posets, we show that if P is a tree then R can be chosen so that the generating function for (P,R)-partitions has a similar factorization.