Coherent random allocations, and the Ewens-Pitman formula
Coherent random allocations, and the Ewens-Pitman formula
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相干随机分配和 Ewens-Pitman 公式
DOI:
10.1007/s10958-006-0338-9
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发表时间:
2006
影响因子:
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通讯作者:
S. Kerov
中科院分区:
文献类型:
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作者:
S. Kerov
Assume that there is a random number K of positive integer random variables S1, …, SKthat are conditionally independent given K and all have identical distributions. A random integer partition N = S1+ S2+ … + SKarises, and we denote by PNthe conditional distribution of this partition for a fixed value of N. We prove that the distributions {PN}N=1∞form a partition structure in the sense of Kingman if and only if they are governed by the Ewens-Pitman Formula. The latter generalizes the celebrated Ewens sampling formula, which has numerous applications in pure and applied mathematics. The distributions of the random variables K and Sjbelong to a family of integer distributions with two real parameters, which we call quasi-binomial. Hence every Ewens-Pitman distribution arises as a result of a two-stage random procedure based on this simple class of integer distributions. Bibliography: 25 titles.
DOI:
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发表时间:
2008
期刊:
影响因子:
--
作者:
佐藤由紀子;金子文也;奥田晴宏;長野正展;出水庸介;土井光暢;田中正一;末宗洋;栗原正明;M. Nagano;M. Tanaka;石川奈保子;高崎紘臣
通讯作者:
高崎紘臣