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© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2020
N. Hoshino et al. (eds.), Pioneering Works on Distribution Theory, SpringerBriefs in
Statistics
https://doi.org/10.1007/978-981-15-9663-6_1
1. Gibbs Base Random Partitions
Masaaki Sibuya
1
Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama-
shi Kanagawa, 223-8522, Japan
Masaaki Sibuya
Email:
[email protected]
Abstract
As a typical family of random partitions on , the set of partitions of
n into k parts, the conditional distribution of Pitman’s random partition,
termed as the Gibbs base random partition, GBRP , is investigated.
The set is a lattice with respect to majorization partial order with
unique minimum and maximum, and GBRP has TP2 with respect to
this order. The main purpose of this paper is to study such a family of
random partitions and the inference on its parameter.
KeywordsA-hypergeometric distributions – Distribution functions on
a majorization order poset – Ewens-Pitman sampling formula – Part-
block representation of partitions – Random partitions of n into k parts
– Total order using TP2
1.1 Introduction
The Ewens-Pitman sampling formula, EPSF , recalled in §1.2.1, is
now the representative of parametric families of random partitions,